avoids double-semicolon problem leading to empty messages in pre-master releases

2026-06-19 22:26:38 +03:00 · 2019-12-03 15:44:15 +01:00
93 changed files with 4128 additions and 6254 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -36,6 +36,12 @@ jobs:
    executor: default
    steps:
      - checkout
+      - run:
+          name: Update submodules
+          command: git submodule update --init --recursive
+      - run:
+          name: Calculate dependencies
+          command: cargo generate-lockfile
      - restore_cache:
          keys:
            - cargo-v3-{{ checksum "rust-toolchain" }}-{{ checksum "Cargo.toml" }}-{{ checksum "Cargo.lock" }}-{{ arch }}
@@ -43,6 +49,7 @@ jobs:
      - run: rustup default $(cat rust-toolchain)
      - run: rustup component add --toolchain $(cat rust-toolchain) rustfmt
      - run: rustup component add --toolchain $(cat rust-toolchain) clippy-preview
+      - run: cargo update
      - run: cargo fetch
      - run: rustc +stable --version
      - run: rustc +$(cat rust-toolchain) --version
@@ -84,6 +91,7 @@ jobs:
            curl https://sh.rustup.rs -sSf | sh -s -- -y
      - run: rustup install $(cat rust-toolchain)
      - run: rustup default $(cat rust-toolchain)
+      - run: cargo update
      - run: cargo fetch
      - run:
          name: Test
@@ -179,7 +187,7 @@ jobs:
      - *restore-cache
      - run:
          name: Run cargo clippy
-          command: cargo clippy 
+          command: cargo clippy --all


 workflows:
@@ -187,7 +195,7 @@ workflows:

  test:
    jobs:
-      # - cargo_fetch
+      - cargo_fetch

      - remote_tests_rust

@@ -197,12 +205,12 @@ workflows:
      #     requires:
      #       - build_test_docs_wheel
      #       - build_doxygen
-      # - rustfmt:
-      #     requires:
-      #       - cargo_fetch
-      # - clippy:
-      #     requires:
-      #      - cargo_fetch
+      - rustfmt:
+          requires:
+            - cargo_fetch
+      - clippy:
+          requires:
+           - cargo_fetch

      - build_doxygen

--- a/.github/workflows/code-quality.yml
+++ b/.github/workflows/code-quality.yml
@@ -1,47 +0,0 @@
-on: push
-name: Code Quality
-jobs:
-
-  check:
-    name: Check
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v1
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2019-11-06
-          override: true
-      - uses: actions-rs/cargo@v1
-        with:
-          command: check
-
-  fmt:
-    name: Rustfmt
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v1
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2019-11-06
-          override: true
-      - run: rustup component add rustfmt
-      - uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: --all -- --check
-
-  run_clippy:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v1
-      - uses: actions-rs/toolchain@v1
-        with:
-            toolchain: nightly-2019-11-06
-            components: clippy
-            override: true
-      - uses: actions-rs/clippy-check@v1
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          args: --all-features
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,170 +1,5 @@
 # Changelog 

-## 1.0.0-beta.22
-
- #1095 normalize email lineends to CRLF
-
- #1095 enable link-time-optimization, saves eg. on android 11 mb
-
- #1099 fix import regarding devicechats
-
- #1092 improve logging
-
- #1096 #1097 #1094 #1090 #1091 internal cleanups
-
-## 1.0.0-beta.21
-
- #1078 #1082 ensure RFC compliance by producing 78 column lines for
-  encoded attachments. 
-
- #1080 don't recreate and thus break group membership if an unknown 
-  sender (or mailer-daemon) sends a message referencing the group chat 
-
- #1081 #1079 some internal cleanups 
-
- update imap-proto dependency, to fix yandex/oauth 
-
-## 1.0.0-beta.20
-
- #1074 fix OAUTH2/gmail
- #1072 fix group members not appearing in contact list
- #1071 never block interrupt_idle (thus hopefully also not on maybe_network())
- #1069 reduce smtp-timeout to 30 seconds
- #1066 #1065 avoid unwrap in dehtml, make literals more readable
-
-## 1.0.0-beta.19
-
- #1058 timeout smtp-send if it doesn't complete in 15 minutes 
-
- #1059 trim down logging
-
-## 1.0.0-beta.18
-
- #1056 avoid panicking when we couldn't read imap-server's greeting
-  message 
-
- #1055 avoid panicking when we don't have a selected folder
-
- #1052 #1049 #1051 improve logging to add thread-id/name and
-  file/lineno to each info/warn message.
-
- #1050 allow python bindings to initialize Account with "os_name".
-
-
-## 1.0.0-beta.17
-
- #1044 implement avatar recoding to 192x192 in core to keep file sizes small. 
-
- #1024 fix #1021 SQL/injection malformed Chat-Group-Name breakage
-
- #1036 fix smtp crash by pulling in a fixed async-smtp 
-
- #1039 fix read-receipts appearing as normal messages when you change
-  MDN settings 
-
- #1040 do not panic on SystemTimeDifference
-
- #1043 avoid potential crashes in malformed From/Chat-Disposition... headers  
-
- #1045 #1041 #1038 #1035 #1034 #1029 #1025 various cleanups and doc
-  improvments 
-
-## 1.0.0-beta.16
-
- alleviate login problems with providers which only
-  support RSA1024 keys by switching back from Rustls 
-  to native-tls, by using the new async-email/async-native-tls 
-  crate from @dignifiedquire. thanks @link2xt. 
-
- introduce per-contact profile images to send out 
-  own profile image heuristically, and fix sending
-  out of profile images in "in-prepare" groups. 
-  this also extends the Chat-spec that is maintained
-  in core to specify Chat-Group-Image and Chat-Group-Avatar
-  headers. thanks @r10s and @hpk42.
-
- fix merging of protected headers from the encrypted
-  to the unencrypted parts, now not happening recursively
-  anymore.  thanks @hpk and @r10s
-
- fix/optimize autocrypt gossip headers to only get 
-  sent when there are more than 2 people in a chat. 
-  thanks @link2xt
-
- fix displayname to use the authenticated name 
-  when available (displayname as coming from contacts 
-  themselves). thanks @simon-laux
-
- introduce preliminary support for offline autoconfig 
-  for nauta provider. thanks @hpk42 @r10s
-
-## 1.0.0-beta.15
-
- fix #994 attachment appeared doubled in chats (and where actually
-  downloaded after smtp-send). @hpk42
-
-## 1.0.0-beta.14
-
- fix packaging issue with our rust-email fork, now we are tracking
-  master again there. hpk42
-
-## 1.0.0-beta.13
-
- fix #976 -- unicode-issues in display-name of email addresses. @hpk42
-
- fix #985 group add/remove member bugs resulting in broken groups.  @hpk42
-
- fix hanging IMAP connections -- we now detect with a 15second timeout
-  if we cannot terminate the IDLE IMAP protocol. @hpk42 @link2xt
-
- fix incoming multipart/mixed containing html, to show up as
-  attachments again.  Fixes usage for simplebot which sends html
-  files for users to interact with the bot. @adbenitez @hpk42 
-
- refinements to internal autocrypt-handling code, do not send
-  prefer-encrypt=nopreference as it is the default if no attribute
-  is present.  @linkxt 
-
- simplify, modularize and rustify several parts 
-  of dc-core (general WIP). @link2xt @flub @hpk42 @r10s
-
- use async-email/async-smtp to handle SMTP connections, might
-  fix connection/reconnection issues. @link2xt 
-
- more tests and refinements for dealing with blobstorage @flub @hpk42 
-
- use a dedicated build-server for CI testing of core PRs
-
-
-## 1.0.0-beta.12
-
- fix python bindings to use core for copying attachments to blobdir
-  and fix core to actually do it. @hpk42
-
-## 1.0.0-beta.11
-
- trigger reconnect more often on imap error states.  Should fix an 
-  issue observed when trying to empty a folder.  @hpk42
-
- un-split qr tests: we fixed qr-securejoin protocol flakyness 
-  last weeks. @hpk42
-
-## 1.0.0-beta.10
-
- fix grpid-determination from in-reply-to and references headers. @hpk42
-
- only send Autocrypt-gossip headers on encrypted messages. @dignifiedquire
-
- fix reply-to-encrypted message to also be encrypted. @hpk42
-
- remove last unsafe code from dc_receive_imf :) @hpk42
-
- add experimental new dc_chat_get_info_json FFI/API so that desktop devs
-  can play with using it. @jikstra
-
- fix encoding of subjects and attachment-filenames @hpk42
-  @dignifiedquire . 
-
 ## 1.0.0-beta.9

 - historic: we now use the mailparse crate and lettre-email to generate mime
@@ -187,9 +22,7 @@
 - fix flakyness/sometimes-failing verified/join-protocols, 
  thanks @flub, @r10s, @hpk42

- fix reply-to-encrypted message to keep encryption 
-
- new DC_EVENT_SECUREJOIN_MEMBER_ADDED event 
+- new DC_EVENT_SECUREJOIN_SUCCEEDED event 

 - many little fixes and rustifications (@link2xt, @flub, @hpk42)

--- a/Cargo.lock
+++ b/Cargo.lock
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,33 +1,26 @@
 [package]
 name = "deltachat"
-version = "1.0.0-beta.22"
+version = "1.0.0-beta.8"
 authors = ["Delta Chat Developers (ML) <delta@codespeak.net>"]
 edition = "2018"
 license = "MPL"

-[profile.release]
-lto = true
-
 [dependencies]
 deltachat_derive = { path = "./deltachat_derive" }

 libc = "0.2.51"
-pgp = { version = "0.4.0", default-features = false }
+pgp = { git = "https://github.com/rpgp/rpgp", branch = "master", default-features = false }
 hex = "0.4.0"
 sha2 = "0.8.0"
-rand = "0.7.0"
-smallvec = "1.0.0"
-reqwest = "0.10.0"
-num-derive = "0.3.0"
+rand = "0.6.5"
+smallvec = "0.6.9"
+reqwest = { version = "0.9.15", default-features = false, features = ["rustls-tls"] }
+num-derive = "0.2.5"
 num-traits = "0.2.6"
-async-smtp = { git = "https://github.com/async-email/async-smtp" }
-email = { git = "https://github.com/deltachat/rust-email", branch = "master" }
-lettre_email = { git = "https://github.com/deltachat/lettre", branch = "master" }
-
-# XXX newer commits of async-imap lead to import-export tests hanging
-async-imap = { git = "https://github.com/async-email/async-imap", branch = "dcc-stable" }
-
-async-native-tls = "0.1.1"
+lettre = { git = "https://github.com/deltachat/lettre", branch = "feat/mail" }
+lettre_email = { git = "https://github.com/deltachat/lettre", branch = "feat/mail" }
+async-imap = { git = "https://github.com/async-email/async-imap", branch="master" }
+async-tls = "0.6"
 async-std = { version = "1.0", features = ["unstable"] }
 base64 = "0.11"
 charset = "0.1"
@@ -37,7 +30,6 @@ serde_json = "1.0"
 chrono = "0.4.6"
 failure = "0.1.5"
 failure_derive = "0.1.5"
-indexmap = "1.3.0"
 # TODO: make optional
 rustyline = "4.1.0"
 lazy_static = "1.4.0"
@@ -52,16 +44,16 @@ backtrace = "0.3.33"
 byteorder = "1.3.1"
 itertools = "0.8.0"
 image-meta = "0.1.0"
-quick-xml = "0.17.1"
+quick-xml = "0.15.0"
 escaper = "0.1.0"
 bitflags = "1.1.0"
 debug_stub_derive = "0.3.0"
 sanitize-filename = "0.2.1"
 stop-token = { version = "0.1.1", features = ["unstable"] }
-mailparse = "0.10.2"
-encoded-words = { git = "https://github.com/async-email/encoded-words", branch="master" }
-native-tls = "0.2.3"
-image = "0.22.3"
+rustls = "0.16.0"
+webpki-roots = "0.18.0"
+webpki = "0.21.0"
+mailparse = "0.10.1"

 [dev-dependencies]
 tempfile = "3.0"
@@ -85,7 +77,7 @@ path = "examples/repl/main.rs"


 [features]
-default = ["nightly", "ringbuf", "reqwest/blocking", "reqwest/json"]
-vendored = ["native-tls/vendored", "reqwest/native-tls-vendored"]
+default = ["nightly", "ringbuf"]
+vendored = []
 nightly = ["pgp/nightly"]
 ringbuf = ["pgp/ringbuf"]
--- a/README.md
+++ b/README.md
@@ -87,15 +87,6 @@ $ cargo test --all
 $ cargo build -p deltachat_ffi --release
 ```

-## Debugging environment variables 
-
- `DCC_IMAP_DEBUG`: if set IMAP protocol commands and responses will be
-  printed
-
- `DCC_MIME_DEBUG`: if set outgoing and incoming message will be printed 
-
-
-
 ### Expensive tests

 Some tests are expensive and marked with `#[ignore]`, to run these
@@ -114,22 +105,3 @@ $ cargo test -- --ignored
 [circle]: https://circleci.com/gh/deltachat/deltachat-core-rust/
 [appveyor-shield]: https://ci.appveyor.com/api/projects/status/lqpegel3ld4ipxj8/branch/master?style=flat-square
 [appveyor]: https://ci.appveyor.com/project/dignifiedquire/deltachat-core-rust/branch/master
-
-## Language bindings and frontend projects
-
-Language bindings are available for:
-
- [C](https://c.delta.chat)
- [Node.js](https://www.npmjs.com/package/deltachat-node)
- [Python](https://py.delta.chat)
- [Go](https://github.com/hugot/go-deltachat/)
- **Java** and **Swift** (contained in the Android/iOS repos)
-
-The following "frontend" projects make use of the Rust-library
-or its language bindings:
-
- [Android](https://github.com/deltachat/deltachat-android)
- [iOS](https://github.com/deltachat/deltachat-ios)
- [Desktop](https://github.com/deltachat/deltachat-desktop)
- [Pidgin](https://code.ur.gs/lupine/purple-plugin-delta/)
- several **Bots**
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -8,6 +8,7 @@ install:
  - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
  - rustc -vV
  - cargo -vV
+  - cargo update

 build: false

--- a/assets/icon-device.png
+++ b/assets/icon-device.png
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+   preserveAspectRatio="xMidYMid meet"
+   viewBox="0 0 45 45"
+   height="60"
+   width="60"
+   version="1.0"
+   inkscape:export-filename="/home/kerle/test-icon.png"
+   inkscape:export-xdpi="409.60001"
+   inkscape:export-ydpi="409.60001">
  <defs
     id="defs4348" />
  <sodipodi:namedview
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     inkscape:document-rotation="0"
-     borderopacity="1"
-     objecttolerance="10"
-     gridtolerance="10"
-     guidetolerance="10"
-     inkscape:pageopacity="0"
-     inkscape:pageshadow="2"
-     inkscape:window-width="1395"
-     inkscape:window-height="855"
-     id="namedview4346"
-     showgrid="false"
-     units="px"
-     inkscape:zoom="4"
-     inkscape:cx="29.308676"
-     inkscape:cy="49.03624"
-     inkscape:window-x="89"
-     inkscape:window-y="108"
-     inkscape:window-maximized="0"
+     inkscape:lockguides="false"
     inkscape:current-layer="svg4344"
-     inkscape:lockguides="false" />
+     inkscape:window-maximized="0"
+     inkscape:window-y="130"
+     inkscape:window-x="89"
+     inkscape:cy="43.28624"
+     inkscape:cx="-21.066324"
+     inkscape:zoom="4"
+     units="px"
+     showgrid="false"
+     id="namedview4346"
+     inkscape:window-height="855"
+     inkscape:window-width="1395"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0"
+     guidetolerance="10"
+     gridtolerance="10"
+     objecttolerance="10"
+     borderopacity="1"
+     inkscape:document-rotation="0"
+     bordercolor="#666666"
+     pagecolor="#ffffff" />
  <metadata
     id="metadata4336">
 Created by potrace 1.15, written by Peter Selinger 2001-2017
@@ -56,16 +56,21 @@ Created by potrace 1.15, written by Peter Selinger 2001-2017
  </cc:Work>
 </rdf:RDF>
 </metadata>
-  <rect
-     y="0"
-     x="0"
-     height="45"
-     width="45"
-     id="rect1420"
-     style="fill:#87aade;fill-opacity:1;stroke:none;stroke-width:0.968078" />
+  <circle
+     style="opacity:1;fill:#ffffff;fill-opacity:1;stroke-width:0.731071"
+     id="path859"
+     cx="22.5"
+     cy="22.5"
+     r="22.5" />
+  <circle
+     r="22.5"
+     cy="22.50293"
+     cx="22.5"
+     id="path4917"
+     style="fill:#87aade;fill-opacity:1;stroke-width:0.58855402" />
  <path
-     id="rect846"
-     style="fill:#ffffff;stroke-width:0.58409804"
+     inkscape:connector-curvature="0"
     d="M 13.5,7.5 V 39 h 0.08654 L 22.533801,29.370239 31.482419,39 h 0.01758 V 7.5 Z m 9.004056,4.108698 1.879508,4.876388 5.039514,0.359779 -3.879358,3.363728 1.227764,5.095749 -4.276893,-2.796643 -4.280949,2.788618 1.237229,-5.093073 -3.873949,-3.371754 5.040866,-0.350417 z"
-     inkscape:connector-curvature="0" />
+     style="fill:#ffffff;stroke-width:0.58409804"
+     id="rect846" />
 </svg>
--- a/assets/welcome-image.jpg
+++ b/assets/welcome-image.jpg
--- a/ci_scripts/remote_tests_python.sh
+++ b/ci_scripts/remote_tests_python.sh
@@ -2,7 +2,7 @@

 export BRANCH=${CIRCLE_BRANCH:?branch to build}
 export REPONAME=${CIRCLE_PROJECT_REPONAME:?repository name}
-export SSHTARGET=${SSHTARGET-ci@b1.delta.chat}
+export SSHTARGET=ci@b1.delta.chat

 # we construct the BUILDDIR such that we can easily share the
 # CARGO_TARGET_DIR between runs ("..")
--- a/ci_scripts/remote_tests_rust.sh
+++ b/ci_scripts/remote_tests_rust.sh
@@ -2,7 +2,7 @@

 export BRANCH=${CIRCLE_BRANCH:?branch to build}
 export REPONAME=${CIRCLE_PROJECT_REPONAME:?repository name}
-export SSHTARGET=${SSHTARGET-ci@b1.delta.chat}
+export SSHTARGET=ci@b1.delta.chat

 # we construct the BUILDDIR such that we can easily share the
 # CARGO_TARGET_DIR between runs ("..")
--- a/deltachat-ffi/Cargo.toml
+++ b/deltachat-ffi/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "deltachat_ffi"
-version = "1.0.0-beta.22"
+version = "1.0.0-beta.8"
 description = "Deltachat FFI"
 authors = ["Delta Chat Developers (ML) <delta@codespeak.net>"]
 edition = "2018"
@@ -21,7 +21,6 @@ libc = "0.2"
 human-panic = "1.0.1"
 num-traits = "0.2.6"
 failure = "0.1.6"
-serde_json = "1.0"

 [features]
 default = ["vendored", "nightly", "ringbuf"]
--- a/deltachat-ffi/deltachat.h
+++ b/deltachat-ffi/deltachat.h
@@ -404,14 +404,14 @@ int             dc_set_config                (dc_context_t* context, const char*
 char*           dc_get_config                (dc_context_t* context, const char* key);

 /**
- * Set stock string translation.
+ * Set stock string translation. 
 *
- * The function will emit warnings if it returns an error state.
+ * The function will emit warnings if it returns an error state. 
 *
 * @memberof dc_context_t
 * @param context The context object
 * @param stock_id   the integer id of the stock message (DC_STR_*)
- * @param stock_msg  the message to be used
+ * @param stock_msg  the message to be used 
 * @return int (==0 on error, 1 on success)
 */
 int             dc_set_stock_translation(dc_context_t* context, uint32_t stock_id, const char* stock_msg);
@@ -994,20 +994,11 @@ uint32_t        dc_get_chat_id_by_contact_id (dc_context_t* context, uint32_t co
 *
 * Example:
 * ~~~
- * char* blobdir = dc_get_blobdir(context);
- * char* file_to_send = mprintf("%s/%s", blobdir, "send.mp4")
- *
 * dc_msg_t* msg = dc_msg_new(context, DC_MSG_VIDEO);
- * dc_msg_set_file(msg, file_to_send, NULL);
+ * dc_msg_set_file(msg, "/file/to/send.mp4", NULL);
 * dc_prepare_msg(context, chat_id, msg);
- *
- * // ... create the file ...
- *
+ * // ... after /file/to/send.mp4 is ready:
 * dc_send_msg(context, chat_id, msg);
- *
- * dc_msg_unref(msg);
- * free(file_to_send);
- * dc_str_unref(file_to_send);
 * ~~~
 *
 * @memberof dc_context_t
@@ -1033,11 +1024,8 @@ uint32_t        dc_prepare_msg               (dc_context_t* context, uint32_t ch
 * Example:
 * ~~~
 * dc_msg_t* msg = dc_msg_new(context, DC_MSG_IMAGE);
- *
 * dc_msg_set_file(msg, "/file/to/send.jpg", NULL);
 * dc_send_msg(context, chat_id, msg);
- *
- * dc_msg_unref(msg);
 * ~~~
 *
 * @memberof dc_context_t
@@ -1146,9 +1134,6 @@ void            dc_set_draft                 (dc_context_t* context, uint32_t ch
 *     // add a changelog
 *     dc_add_device_msg(context, "update-123", changelog_msg);
 * }
- *
- * dc_msg_unref(changelog_msg);
- * dc_msg_unref(welome_msg);
 * ~~~
 */
 uint32_t        dc_add_device_msg            (dc_context_t* context, const char* label, dc_msg_t* msg);
@@ -1603,7 +1588,7 @@ char*           dc_get_mime_headers          (dc_context_t* context, uint32_t ms
 void            dc_delete_msgs               (dc_context_t* context, const uint32_t* msg_ids, int msg_cnt);

 /**
- * Empty IMAP server folder: delete all messages.
+ * Empty IMAP server folder: delete all messages. 
 *
 * @memberof dc_context_t
 * @param context The context object as created by dc_context_new()
@@ -1962,7 +1947,7 @@ void            dc_imex                      (dc_context_t* context, int what, c
 *         }
 *         while (!configure_succeeded())
 *     }
- *     dc_str_unref(file);
+ *     free(file);
 * }
 * ~~~
 *
@@ -2617,25 +2602,6 @@ dc_lot_t*        dc_chatlist_get_summary     (const dc_chatlist_t* chatlist, siz
 dc_context_t*    dc_chatlist_get_context     (dc_chatlist_t* chatlist);


-/**
- * Get info summary for a chat, in json format.
- *
- * The returned json string has the following key/values:
- *
- * id: chat id
- * name: chat/group name
- * color: color of this chat
- * last-message-from: who sent the last message
- * last-message-text: message (truncated)
- * last-message-state: DC_STATE* constant
- * last-message-date:
- * avatar-path: path-to-blobfile
- * is_verified: yes/no
-
- * @return a utf8-encoded json string containing all requested info. Must be freed using dc_str_unref().  NULL is never returned.
- */
-char*            dc_chat_get_info_json       (dc_context_t* context, size_t chat_id);
-
 /**
 * @class dc_chat_t
 *
@@ -3645,15 +3611,11 @@ int             dc_contact_is_blocked        (const dc_contact_t* contact);


 /**
- * Check if a contact was verified. E.g. by a secure-join QR code scan
- * and if the key has not changed since this verification.
+ * Same as dc_contact_is_verified() but allows speeding up things
+ * by adding the peerstate belonging to the contact.
+ * If you do not have the peerstate available, it is loaded automatically.
 *
- * The UI may draw a checkbox or something like that beside verified contacts.
- *
- * @memberof dc_contact_t
- * @param contact The contact object.
- * @return 0: contact is not verified.
- *    2: SELF and contact have verified their fingerprints in both directions; in the UI typically checkmarks are shown.
+ * @private @memberof dc_context_t
 */
 int             dc_contact_is_verified       (dc_contact_t* contact);

@@ -4054,6 +4016,11 @@ int64_t          dc_lot_get_timestamp     (const dc_lot_t* lot);
 */
 #define DC_CERTCK_STRICT 1

+/**
+ * Accept invalid hostnames, but not invalid certificates.
+ */
+#define DC_CERTCK_ACCEPT_INVALID_HOSTNAMES 2
+
 /**
 * Accept invalid certificates, including self-signed ones
 * or having incorrect hostname.
@@ -4167,30 +4134,30 @@ int64_t          dc_lot_get_timestamp     (const dc_lot_t* lot);
 #define DC_EVENT_IMAP_MESSAGE_MOVED   105

 /**
- * Emitted when an IMAP folder was emptied.
+ * Emitted when an IMAP folder was emptied. 
 *
 * @param data1 0
- * @param data2 (const char*) folder name.
+ * @param data2 (const char*) folder name. 
 *     Must not be unref'd or modified and is valid only until the callback returns.
 * @return 0
 */
 #define DC_EVENT_IMAP_FOLDER_EMPTIED  106

 /**
- * Emitted when a new blob file was successfully written
+ * Emitted when a new blob file was successfully written 
 *
 * @param data1 0
- * @param data2 (const char*) path name
+ * @param data2 (const char*) path name 
 *     Must not be unref'd or modified and is valid only until the callback returns.
 * @return 0
 */
 #define DC_EVENT_NEW_BLOB_FILE 150

 /**
- * Emitted when a blob file was successfully deleted
+ * Emitted when a blob file was successfully deleted 
 *
 * @param data1 0
- * @param data2 (const char*) path name
+ * @param data2 (const char*) path name 
 *     Must not be unref'd or modified and is valid only until the callback returns.
 * @return 0
 */
--- a/deltachat-ffi/src/lib.rs
+++ b/deltachat-ffi/src/lib.rs
@@ -4,14 +4,12 @@
    non_upper_case_globals,
    non_upper_case_globals,
    non_camel_case_types,
-    clippy::missing_safety_doc,
-    clippy::expect_fun_call
+    non_snake_case
 )]

 #[macro_use]
 extern crate human_panic;
 extern crate num_traits;
-extern crate serde_json;

 use std::collections::HashMap;
 use std::convert::TryInto;
@@ -31,8 +29,6 @@ use deltachat::message::MsgId;
 use deltachat::stock::StockMessage;
 use deltachat::*;

-mod dc_array;
-
 mod string;
 use self::string::*;

@@ -123,79 +119,74 @@ impl ContextWrapper {
    }

    /// Translates the callback from the rust style to the C-style version.
-    unsafe fn translate_cb(&self, event: Event) {
-        if let Some(ffi_cb) = self.cb {
-            let event_id = event.as_id();
-            match event {
-                Event::Info(msg)
-                | Event::SmtpConnected(msg)
-                | Event::ImapConnected(msg)
-                | Event::SmtpMessageSent(msg)
-                | Event::ImapMessageDeleted(msg)
-                | Event::ImapMessageMoved(msg)
-                | Event::ImapFolderEmptied(msg)
-                | Event::NewBlobFile(msg)
-                | Event::DeletedBlobFile(msg)
-                | Event::Warning(msg)
-                | Event::Error(msg)
-                | Event::ErrorNetwork(msg)
-                | Event::ErrorSelfNotInGroup(msg) => {
-                    let data2 = CString::new(msg).unwrap_or_default();
-                    ffi_cb(self, event_id, 0, data2.as_ptr() as uintptr_t);
-                }
-                Event::MsgsChanged { chat_id, msg_id }
-                | Event::IncomingMsg { chat_id, msg_id }
-                | Event::MsgDelivered { chat_id, msg_id }
-                | Event::MsgFailed { chat_id, msg_id }
-                | Event::MsgRead { chat_id, msg_id } => {
-                    ffi_cb(
+    unsafe fn translate_cb(&self, event: Event) -> uintptr_t {
+        match self.cb {
+            Some(ffi_cb) => {
+                let event_id = event.as_id();
+                match event {
+                    Event::Info(msg)
+                    | Event::SmtpConnected(msg)
+                    | Event::ImapConnected(msg)
+                    | Event::SmtpMessageSent(msg)
+                    | Event::ImapMessageDeleted(msg)
+                    | Event::ImapMessageMoved(msg)
+                    | Event::ImapFolderEmptied(msg)
+                    | Event::NewBlobFile(msg)
+                    | Event::DeletedBlobFile(msg)
+                    | Event::Warning(msg)
+                    | Event::Error(msg)
+                    | Event::ErrorNetwork(msg)
+                    | Event::ErrorSelfNotInGroup(msg) => {
+                        let data2 = CString::new(msg).unwrap_or_default();
+                        ffi_cb(self, event_id, 0, data2.as_ptr() as uintptr_t)
+                    }
+                    Event::MsgsChanged { chat_id, msg_id }
+                    | Event::IncomingMsg { chat_id, msg_id }
+                    | Event::MsgDelivered { chat_id, msg_id }
+                    | Event::MsgFailed { chat_id, msg_id }
+                    | Event::MsgRead { chat_id, msg_id } => ffi_cb(
                        self,
                        event_id,
                        chat_id as uintptr_t,
                        msg_id.to_u32() as uintptr_t,
-                    );
-                }
-                Event::ChatModified(chat_id) => {
-                    ffi_cb(self, event_id, chat_id as uintptr_t, 0);
-                }
-                Event::ContactsChanged(id) | Event::LocationChanged(id) => {
-                    let id = id.unwrap_or_default();
-                    ffi_cb(self, event_id, id as uintptr_t, 0);
-                }
-                Event::ConfigureProgress(progress) | Event::ImexProgress(progress) => {
-                    ffi_cb(self, event_id, progress as uintptr_t, 0);
-                }
-                Event::ImexFileWritten(file) => {
-                    let data1 = file.to_c_string().unwrap_or_default();
-                    ffi_cb(self, event_id, data1.as_ptr() as uintptr_t, 0);
-                }
-                Event::SecurejoinInviterProgress {
-                    contact_id,
-                    progress,
-                }
-                | Event::SecurejoinJoinerProgress {
-                    contact_id,
-                    progress,
-                } => {
-                    ffi_cb(
+                    ),
+                    Event::ChatModified(chat_id) => ffi_cb(self, event_id, chat_id as uintptr_t, 0),
+                    Event::ContactsChanged(id) | Event::LocationChanged(id) => {
+                        let id = id.unwrap_or_default();
+                        ffi_cb(self, event_id, id as uintptr_t, 0)
+                    }
+                    Event::ConfigureProgress(progress) | Event::ImexProgress(progress) => {
+                        ffi_cb(self, event_id, progress as uintptr_t, 0)
+                    }
+                    Event::ImexFileWritten(file) => {
+                        let data1 = file.to_c_string().unwrap_or_default();
+                        ffi_cb(self, event_id, data1.as_ptr() as uintptr_t, 0)
+                    }
+                    Event::SecurejoinInviterProgress {
+                        contact_id,
+                        progress,
+                    }
+                    | Event::SecurejoinJoinerProgress {
+                        contact_id,
+                        progress,
+                    } => ffi_cb(
                        self,
                        event_id,
                        contact_id as uintptr_t,
                        progress as uintptr_t,
-                    );
-                }
-                Event::SecurejoinMemberAdded {
-                    chat_id,
-                    contact_id,
-                } => {
-                    ffi_cb(
+                    ),
+                    Event::SecurejoinMemberAdded {
+                        chat_id,
+                        contact_id,
+                    } => ffi_cb(
                        self,
                        event_id,
                        chat_id as uintptr_t,
                        contact_id as uintptr_t,
-                    );
+                    ),
                }
            }
+            None => 0,
        }
    }
 }
@@ -415,7 +406,7 @@ fn render_info(
 ) -> std::result::Result<String, std::fmt::Error> {
    let mut res = String::new();
    for (key, value) in &info {
-        writeln!(&mut res, "{}={}", key, value)?;
+        write!(&mut res, "{}={}\n", key, value)?;
    }

    Ok(res)
@@ -516,7 +507,7 @@ pub unsafe extern "C" fn dc_interrupt_imap_idle(context: *mut dc_context_t) {
    }
    let ffi_context = &*context;
    ffi_context
-        .with_inner(|ctx| job::interrupt_inbox_idle(ctx))
+        .with_inner(|ctx| job::interrupt_inbox_idle(ctx, true))
        .unwrap_or(())
 }

@@ -1346,7 +1337,7 @@ pub unsafe extern "C" fn dc_get_mime_headers(
        .with_inner(|ctx| {
            message::get_mime_headers(ctx, MsgId::new(msg_id))
                .map(|s| s.strdup())
-                .unwrap_or_else(ptr::null_mut)
+                .unwrap_or_else(|| ptr::null_mut())
        })
        .unwrap_or_else(|_| ptr::null_mut())
 }
@@ -1813,7 +1804,7 @@ pub unsafe extern "C" fn dc_get_securejoin_qr(
    ffi_context
        .with_inner(|ctx| {
            securejoin::dc_get_securejoin_qr(ctx, chat_id)
-                .unwrap_or_else(|| "".to_string())
+                .unwrap_or("".to_string())
                .strdup()
        })
        .unwrap_or_else(|_| "".strdup())
@@ -2386,42 +2377,6 @@ pub unsafe extern "C" fn dc_chat_is_sending_locations(chat: *mut dc_chat_t) -> l
    ffi_chat.chat.is_sending_locations() as libc::c_int
 }

-#[no_mangle]
-pub unsafe extern "C" fn dc_chat_get_info_json(
-    context: *mut dc_context_t,
-    chat_id: u32,
-) -> *mut libc::c_char {
-    if context.is_null() {
-        eprintln!("ignoring careless call to dc_chat_get_info_json()");
-        return "".strdup();
-    }
-    let ffi_context = &*context;
-    ffi_context
-        .with_inner(|ctx| {
-            let chat = match chat::Chat::load_from_db(ctx, chat_id) {
-                Ok(chat) => chat,
-                Err(err) => {
-                    error!(ctx, "dc_get_chat_info_json() failed to load chat: {}", err);
-                    return "".strdup();
-                }
-            };
-            let info = match chat.get_info(ctx) {
-                Ok(info) => info,
-                Err(err) => {
-                    error!(
-                        ctx,
-                        "dc_get_chat_info_json() failed to get chat info: {}", err
-                    );
-                    return "".strdup();
-                }
-            };
-            serde_json::to_string(&info)
-                .unwrap_or_log_default(ctx, "dc_get_chat_info_json() failed to serialise to json")
-                .strdup()
-        })
-        .unwrap_or_else(|_| "".strdup())
-}
-
 // dc_msg_t

 /// FFI struct for [dc_msg_t]
@@ -2601,7 +2556,7 @@ pub unsafe extern "C" fn dc_msg_get_filemime(msg: *mut dc_msg_t) -> *mut libc::c
    if let Some(x) = ffi_msg.message.get_filemime() {
        x.strdup()
    } else {
-        dc_strdup(ptr::null())
+        return dc_strdup(ptr::null());
    }
 }

@@ -2993,7 +2948,7 @@ pub unsafe extern "C" fn dc_contact_get_profile_image(
                .contact
                .get_profile_image(ctx)
                .map(|p| p.to_string_lossy().strdup())
-                .unwrap_or_else(std::ptr::null_mut)
+                .unwrap_or_else(|| std::ptr::null_mut())
        })
        .unwrap_or_else(|_| ptr::null_mut())
 }
--- a/deltachat-ffi/src/providers.rs
+++ b/deltachat-ffi/src/providers.rs
@@ -86,6 +86,8 @@ pub unsafe extern "C" fn dc_provider_get_status(provider: *const dc_provider_t)
 }

 #[no_mangle]
-pub unsafe extern "C" fn dc_provider_unref(_provider: *const dc_provider_t) {}
+pub unsafe extern "C" fn dc_provider_unref(_provider: *const dc_provider_t) {
+    ()
+}

 // TODO expose general provider overview url?
--- a/examples/repl/cmdline.rs
+++ b/examples/repl/cmdline.rs
@@ -20,14 +20,14 @@ use deltachat::qr::*;
 use deltachat::sql;
 use deltachat::Event;

-/// Reset database tables.
+/// Reset database tables. This function is called from Core cmdline.
 /// Argument is a bitmask, executing single or multiple actions in one call.
 /// e.g. bitmask 7 triggers actions definded with bits 1, 2 and 4.
-fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
-    println!("Resetting tables ({})...", bits);
+pub fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
+    info!(context, "Resetting tables ({})...", bits);
    if 0 != bits & 1 {
        sql::execute(context, &context.sql, "DELETE FROM jobs;", params![]).unwrap();
-        println!("(1) Jobs reset.");
+        info!(context, "(1) Jobs reset.");
    }
    if 0 != bits & 2 {
        sql::execute(
@@ -37,11 +37,11 @@ fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
            params![],
        )
        .unwrap();
-        println!("(2) Peerstates reset.");
+        info!(context, "(2) Peerstates reset.");
    }
    if 0 != bits & 4 {
        sql::execute(context, &context.sql, "DELETE FROM keypairs;", params![]).unwrap();
-        println!("(4) Private keypairs reset.");
+        info!(context, "(4) Private keypairs reset.");
    }
    if 0 != bits & 8 {
        sql::execute(
@@ -80,7 +80,7 @@ fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
        )
        .unwrap();
        sql::execute(context, &context.sql, "DELETE FROM leftgrps;", params![]).unwrap();
-        println!("(8) Rest but server config reset.");
+        info!(context, "(8) Rest but server config reset.");
    }

    context.call_cb(Event::MsgsChanged {
@@ -94,9 +94,7 @@ fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
 fn dc_poke_eml_file(context: &Context, filename: impl AsRef<Path>) -> Result<(), Error> {
    let data = dc_read_file(context, filename)?;

-    if let Err(err) = dc_receive_imf(context, &data, "import", 0, 0) {
-        println!("dc_receive_imf errored: {:?}", err);
-    }
+    dc_receive_imf(context, &data, "import", 0, 0);
    Ok(())
 }

@@ -155,7 +153,7 @@ fn poke_spec(context: &Context, spec: Option<&str>) -> libc::c_int {
                let name = name_f.to_string_lossy();
                if name.ends_with(".eml") {
                    let path_plus_name = format!("{}/{}", &real_spec, name);
-                    println!("Import: {}", path_plus_name);
+                    info!(context, "Import: {}", path_plus_name);
                    if dc_poke_eml_file(context, path_plus_name).is_ok() {
                        read_cnt += 1
                    }
@@ -163,7 +161,10 @@ fn poke_spec(context: &Context, spec: Option<&str>) -> libc::c_int {
            }
        }
    }
-    println!("Import: {} items read from \"{}\".", read_cnt, &real_spec);
+    info!(
+        context,
+        "Import: {} items read from \"{}\".", read_cnt, &real_spec
+    );
    if read_cnt > 0 {
        context.call_cb(Event::MsgsChanged {
            chat_id: 0,
@@ -187,7 +188,8 @@ fn log_msg(context: &Context, prefix: impl AsRef<str>, msg: &Message) {
    };
    let temp2 = dc_timestamp_to_str(msg.get_timestamp());
    let msgtext = msg.get_text();
-    println!(
+    info!(
+        context,
        "{}{}{}{}: {} (Contact#{}): {} {}{}{}{}{} [{}]",
        prefix.as_ref(),
        msg.get_id(),
@@ -221,14 +223,16 @@ fn log_msglist(context: &Context, msglist: &Vec<MsgId>) -> Result<(), Error> {
    let mut lines_out = 0;
    for &msg_id in msglist {
        if msg_id.is_daymarker() {
-            println!(
+            info!(
+                context,
                "--------------------------------------------------------------------------------"
            );

            lines_out += 1
        } else if !msg_id.is_special() {
            if lines_out == 0 {
-                println!(
+                info!(
+                    context,
                    "--------------------------------------------------------------------------------",
                );
                lines_out += 1
@@ -238,7 +242,8 @@ fn log_msglist(context: &Context, msglist: &Vec<MsgId>) -> Result<(), Error> {
        }
    }
    if lines_out > 0 {
-        println!(
+        info!(
+            context,
            "--------------------------------------------------------------------------------"
        );
    }
@@ -288,7 +293,7 @@ fn log_contactlist(context: &Context, contacts: &Vec<u32>) {
                );
            }

-            println!("Contact#{}: {}{}", contact_id, line, line2);
+            info!(context, "Contact#{}: {}{}", contact_id, line, line2);
        }
    }
 }
@@ -484,7 +489,7 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
            println!("{:#?}", context.get_info());
        }
        "interrupt" => {
-            interrupt_inbox_idle(context);
+            interrupt_inbox_idle(context, true);
        }
        "maybenetwork" => {
            maybe_network(context);
@@ -503,13 +508,15 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {

            let cnt = chatlist.len();
            if cnt > 0 {
-                println!(
+                info!(
+                    context,
                    "================================================================================"
                );

                for i in (0..cnt).rev() {
                    let chat = Chat::load_from_db(context, chatlist.get_chat_id(i))?;
-                    println!(
+                    info!(
+                        context,
                        "{}#{}: {} [{} fresh]",
                        chat_prefix(&chat),
                        chat.get_id(),
@@ -531,7 +538,8 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
                    let timestr = dc_timestamp_to_str(lot.get_timestamp());
                    let text1 = lot.get_text1();
                    let text2 = lot.get_text2();
-                    println!(
+                    info!(
+                        context,
                        "{}{}{}{} [{}]{}",
                        text1.unwrap_or(""),
                        if text1.is_some() { ": " } else { "" },
@@ -544,13 +552,14 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
                            ""
                        },
                    );
-                    println!(
+                    info!(
+                        context,
                        "================================================================================"
                    );
                }
            }
            if location::is_sending_locations_to_chat(context, 0) {
-                println!("Location streaming enabled.");
+                info!(context, "Location streaming enabled.");
            }
            println!("{} chats", cnt);
        }
@@ -578,7 +587,8 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
            } else {
                format!("{} member(s)", members.len())
            };
-            println!(
+            info!(
+                context,
                "{}#{}: {} [{}]{}{}",
                chat_prefix(sel_chat),
                sel_chat.get_id(),
@@ -681,7 +691,7 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
            ensure!(sel_chat.is_some(), "No chat selected.");

            let contacts = chat::get_chat_contacts(context, sel_chat.as_ref().unwrap().get_id());
-            println!("Memberlist:");
+            info!(context, "Memberlist:");

            log_contactlist(context, &contacts);
            println!(
@@ -707,7 +717,8 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
            let default_marker = "-".to_string();
            for location in &locations {
                let marker = location.marker.as_ref().unwrap_or(&default_marker);
-                println!(
+                info!(
+                    context,
                    "Loc#{}: {}: lat={} lng={} acc={} Chat#{} Contact#{} {} {}",
                    location.location_id,
                    dc_timestamp_to_str(location.timestamp),
@@ -721,7 +732,7 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
                );
            }
            if locations.is_empty() {
-                println!("No locations.");
+                info!(context, "No locations.");
            }
        }
        "sendlocations" => {
@@ -868,7 +879,7 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
        }
        "forward" => {
            ensure!(
-                !arg1.is_empty() && !arg2.is_empty(),
+                !arg1.is_empty() && arg2.is_empty(),
                "Arguments <msg-id> <chat-id> expected"
            );

@@ -925,14 +936,7 @@ pub fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::Error> {
            let contact = Contact::get_by_id(context, contact_id)?;
            let name_n_addr = contact.get_name_n_addr();

-            let mut res = format!(
-                "Contact info for: {}:\nIcon: {}\n",
-                name_n_addr,
-                match contact.get_profile_image(context) {
-                    Some(image) => image.to_str().unwrap().to_string(),
-                    None => "NoIcon".to_string(),
-                }
-            );
+            let mut res = format!("Contact info for: {}:\n\n", name_n_addr);

            res += &Contact::get_encrinfo(context, contact_id)?;

--- a/examples/repl/main.rs
+++ b/examples/repl/main.rs
@@ -41,7 +41,7 @@ use self::cmdline::*;

 // Event Handler

-fn receive_event(_context: &Context, event: Event) {
+fn receive_event(_context: &Context, event: Event) -> libc::uintptr_t {
    match event {
        Event::Info(msg) => {
            /* do not show the event as this would fill the screen */
@@ -111,6 +111,8 @@ fn receive_event(_context: &Context, event: Event) {
            print!("\x1b[33m{{Received {:?}}}\n\x1b[0m", event);
        }
    }
+
+    0
 }

 // Threads for waiting for messages and for jobs
@@ -200,7 +202,7 @@ fn stop_threads(context: &Context) {
        println!("Stopping threads");
        IS_RUNNING.store(false, Ordering::Relaxed);

-        interrupt_inbox_idle(context);
+        interrupt_inbox_idle(context, true);
        interrupt_mvbox_idle(context);
        interrupt_sentbox_idle(context);
        interrupt_smtp_idle(context);
--- a/examples/simple.rs
+++ b/examples/simple.rs
@@ -16,18 +16,21 @@ use deltachat::job::{
 };
 use deltachat::Event;

-fn cb(_ctx: &Context, event: Event) {
+fn cb(_ctx: &Context, event: Event) -> usize {
    print!("[{:?}]", event);

    match event {
        Event::ConfigureProgress(progress) => {
            print!("  progress: {}\n", progress);
+            0
        }
        Event::Info(msg) | Event::Warning(msg) | Event::Error(msg) | Event::ErrorNetwork(msg) => {
            print!("  {}\n", msg);
+            0
        }
        _ => {
            print!("\n");
+            0
        }
    }
 }
@@ -101,7 +104,7 @@ fn main() {
    println!("stopping threads");

    *running.write().unwrap() = false;
-    deltachat::job::interrupt_inbox_idle(&ctx);
+    deltachat::job::interrupt_inbox_idle(&ctx, true);
    deltachat::job::interrupt_smtp_idle(&ctx);

    println!("joining");
--- a/python/README.rst
+++ b/python/README.rst
@@ -6,81 +6,8 @@ This package provides bindings to the deltachat-core_ Rust -library
 which provides imap/smtp/crypto handling as well as chat/group/messages
 handling to Android, Desktop and IO user interfaces.

-
-Installing bindings from source (Updated: 21-Dec-2019)
-=========================================================
-
-Install Rust and Cargo first.  Deltachat needs a specific nightly
-version, the easiest is probably to first install Rust stable from
-rustup and then use this to install the correct nightly version.
-
-Install rustup using::
-
-   curl https://sh.rustup.rs -sSf | sh
-
-GIT clone the repo and use rustup to check the correct nightly version
-is available, if you do not have the right nightly version rustup will
-download and install it::
-
-   git clone https://github.com/deltachat/deltachat-core-rust
-   cd deltachat-core-rust
-   rustup show
-
-To install the python bindings make sure you have python installed, a
-recent 3.x version will also come with the required venv module.
-E.g. on Debian-based systems `apt install python3 python3-pip
-python3-venv` should give you a usable python installation.  If you
-prefer you can also
-`Install virtualenv <https://virtualenv.pypa.io/en/stable/installation/>`_
-as an alternative to `venv`.
-
-Ensure you are in the deltachat-core-rust/python directory, create the
-vivrtual environment and activate it in your shell::
-
-   cd python
-   python3 -m venv venv  # or: virtualenv venv
-   source venv/bin/activate
-
-You should now be able to build the python bindings using the supplied
-script::
-
-   ./install_python_bindings.py
-
-The installation might take a while, depending on your machine.
-The bindings will be installed in release mode but with debug symbols.
-The release mode is necessary because some tests generate RSA keys
-which is prohibitively slow in debug mode.
-
-After successful binding installation you can install a few more
-python packages before finally running the tests::
-
-    python -m pip install pytest pytest-timeout pytest-rerunfailures requests
-    pytest -v tests
-
-
-running "live" tests (experimental)
-----------------------------------
-
-If you want to run "liveconfig" functional tests you can set
-``DCC_PY_LIVECONFIG`` to:
-
- a particular https-url that you can ask for from the delta
-  chat devs.
-
- or the path of a file that contains two lines, each describing
-  via "addr=... mail_pw=..." a test account login that will
-  be used for the live tests.
-
-With ``DCC_PY_LIVECONFIG`` set pytest invocations will use real
-e-mail accounts and run through all functional "liveconfig" tests.
-
-
-============================================================================================================================
-(21-Dec-2019) THE BELOW WHEELS ARE CURRENTLY NOT WORKING/BROKEN, COMPILE FROM SOURCE USING ABOVE INSTRUCTIONS INSTEAD 
-============================================================================================================================
-
-Installing pre-built packages (linux-only)  (OUTDATED)
-========================================================
+Installing pre-built packages (linux-only)
+==========================================

 If you have a linux system you may install the ``deltachat`` binary "wheel" package
 without any "build-from-source" steps.
@@ -104,8 +31,8 @@ without any "build-from-source" steps.
        python -c "import deltachat"


-Installing a wheel from a PR/branch    (OUTDATED)
-------------------------------------------------
+Installing a wheel from a PR/branch
+---------------------------------------

 For Linux, we automatically build wheels for all github PR branches
 and push them to a python package index. To install the latest github ``master`` branch::
@@ -119,7 +46,62 @@ and push them to a python package index. To install the latest github ``master``
    `in contact with us <https://delta.chat/en/contribute>`_.


+Installing bindings from source
+===============================

+If you can't use "binary" method above then you need to compile
+to core deltachat library::
+
+    git clone https://github.com/deltachat/deltachat-core-rust
+    cd deltachat-core-rust
+    cd python
+
+If you don't have one active, create and activate a python "virtualenv":
+
+    python virtualenv venv  # or python -m venv
+    source venv/bin/activate
+
+Afterwards ``which python`` tells you that it comes out of the "venv"
+directory that contains all python install artifacts. Let's first
+install test tools::
+
+    pip install pytest pytest-timeout pytest-rerunfailures requests
+
+then cargo-build and install the deltachat bindings::
+
+    python install_python_bindings.py
+
+The bindings will be installed in release mode but with debug symbols.
+The release mode is necessary because some tests generate RSA keys
+which is prohibitively slow in debug mode.
+
+After successful binding installation you can finally run the tests::
+
+    pytest -v tests
+
+.. note::
+
+    Some tests are sometimes failing/hanging because of
+    https://github.com/deltachat/deltachat-core-rust/issues/331
+    and
+    https://github.com/deltachat/deltachat-core-rust/issues/326
+
+
+running "live" tests (experimental)
+-----------------------------------
+
+If you want to run "liveconfig" functional tests you can set
+``DCC_PY_LIVECONFIG`` to:
+
+- a particular https-url that you can ask for from the delta
+  chat devs.
+
+- or the path of a file that contains two lines, each describing
+  via "addr=... mail_pw=..." a test account login that will
+  be used for the live tests.
+
+With ``DCC_PY_LIVECONFIG`` set pytest invocations will use real
+e-mail accounts and run through all functional "liveconfig" tests.



--- a/python/src/deltachat/account.py
+++ b/python/src/deltachat/account.py
@@ -3,7 +3,6 @@
 from __future__ import print_function
 import atexit
 import threading
-import os
 import re
 import time
 from array import array
@@ -26,7 +25,7 @@ class Account(object):
    by the underlying deltachat core library.  All public Account methods are
    meant to be memory-safe and return memory-safe objects.
    """
-    def __init__(self, db_path, logid=None, eventlogging=True, os_name=None, debug=True):
+    def __init__(self, db_path, logid=None, eventlogging=True, debug=True):
        """ initialize account object.

        :param db_path: a path to the account database. The database
@@ -34,11 +33,10 @@ class Account(object):
        :param logid: an optional logging prefix that should be used with
                      the default internal logging.
        :param eventlogging: if False no eventlogging and no context callback will be configured
-        :param os_name: this will be put to the X-Mailer header in outgoing messages
        :param debug: turn on debug logging for events.
        """
        self._dc_context = ffi.gc(
-            lib.dc_context_new(lib.py_dc_callback, ffi.NULL, as_dc_charpointer(os_name)),
+            lib.dc_context_new(lib.py_dc_callback, ffi.NULL, ffi.NULL),
            _destroy_dc_context,
        )
        if eventlogging:
@@ -96,12 +94,9 @@ class Account(object):
        """
        self._check_config_key(name)
        name = name.encode("utf8")
+        value = value.encode("utf8")
        if name == b"addr" and self.is_configured():
            raise ValueError("can not change 'addr' after account is configured.")
-        if value is not None:
-            value = value.encode("utf8")
-        else:
-            value = ffi.NULL
        lib.dc_set_config(self._dc_context, name, value)

    def get_config(self, name):
@@ -137,18 +132,6 @@ class Account(object):
        """
        return lib.dc_is_configured(self._dc_context)

-    def set_avatar(self, img_path):
-        """Set self avatar.
-
-        :raises ValueError: if profile image could not be set
-        :returns: None
-        """
-        if img_path is None:
-            self.set_config("selfavatar", None)
-        else:
-            assert os.path.exists(img_path), img_path
-            self.set_config("selfavatar", img_path)
-
    def check_is_configured(self):
        """ Raise ValueError if this account is not configured. """
        if not self.is_configured():
--- a/python/src/deltachat/chat.py
+++ b/python/src/deltachat/chat.py
@@ -2,7 +2,6 @@

 import mimetypes
 import calendar
-import json
 from datetime import datetime
 import os
 from .cutil import as_dc_charpointer, from_dc_charpointer, iter_array
@@ -109,30 +108,6 @@ class Chat(object):

    # ------  chat messaging API ------------------------------

-    def send_msg(self, msg):
-        """send a message by using a ready Message object.
-
-        :param msg: a :class:`deltachat.message.Message` instance
-           previously returned by
-           e.g. :meth:`deltachat.message.Message.new_empty` or
-           :meth:`prepare_file`.
-        :raises ValueError: if message can not be sent.
-
-        :returns: a :class:`deltachat.message.Message` instance as
-           sent out.  This is the same object as was passed in, which
-           has been modified with the new state of the core.
-        """
-        if msg.is_out_preparing():
-            assert msg.id != 0
-            # get a fresh copy of dc_msg, the core needs it
-            msg = Message.from_db(self.account, msg.id)
-        sent_id = lib.dc_send_msg(self._dc_context, self.id, msg._dc_msg)
-        if sent_id == 0:
-            raise ValueError("message could not be sent")
-        # modify message in place to avoid bad state for the caller
-        msg._dc_msg = Message.from_db(self.account, sent_id)._dc_msg
-        return msg
-
    def send_text(self, text):
        """ send a text message and return the resulting Message instance.

@@ -154,12 +129,9 @@ class Chat(object):
        :raises ValueError: if message can not be send/chat does not exist.
        :returns: the resulting :class:`deltachat.message.Message` instance
        """
-        msg = Message.new_empty(self.account, view_type="file")
-        msg.set_file(path, mime_type)
-        sent_id = lib.dc_send_msg(self._dc_context, self.id, msg._dc_msg)
-        if sent_id == 0:
-            raise ValueError("message could not be sent")
-        return Message.from_db(self.account, sent_id)
+        msg = self.prepare_message_file(path=path, mime_type=mime_type)
+        self.send_prepared(msg)
+        return msg

    def send_image(self, path):
        """ send an image message and return the resulting Message instance.
@@ -169,12 +141,9 @@ class Chat(object):
        :returns: the resulting :class:`deltachat.message.Message` instance
        """
        mime_type = mimetypes.guess_type(path)[0]
-        msg = Message.new_empty(self.account, view_type="image")
-        msg.set_file(path, mime_type)
-        sent_id = lib.dc_send_msg(self._dc_context, self.id, msg._dc_msg)
-        if sent_id == 0:
-            raise ValueError("message could not be sent")
-        return Message.from_db(self.account, sent_id)
+        msg = self.prepare_message_file(path=path, mime_type=mime_type, view_type="image")
+        self.send_prepared(msg)
+        return msg

    def prepare_message(self, msg):
        """ create a new prepared message.
@@ -273,12 +242,6 @@ class Chat(object):
        """
        return lib.dc_marknoticed_chat(self._dc_context, self.id)

-    def get_summary(self):
-        """ return dictionary with summary information. """
-        dc_res = lib.dc_chat_get_info_json(self._dc_context, self.id)
-        s = from_dc_charpointer(dc_res)
-        return json.loads(s)
-
    # ------  group management API ------------------------------

    def add_contact(self, contact):
@@ -361,18 +324,6 @@ class Chat(object):
            return None
        return from_dc_charpointer(dc_res)

-    def get_color(self):
-        """return the color of the chat.
-        :returns: color as 0x00rrggbb
-        """
-        return lib.dc_chat_get_color(self._dc_chat)
-
-    def get_subtitle(self):
-        """return the subtitle of the chat
-        :returns: the subtitle
-        """
-        return from_dc_charpointer(lib.dc_chat_get_subtitle(self._dc_chat))
-
    # ------  location streaming API ------------------------------

    def is_sending_locations(self):
@@ -381,12 +332,6 @@ class Chat(object):
        """
        return lib.dc_is_sending_locations_to_chat(self._dc_context, self.id)

-    def is_archived(self):
-        """return True if this chat is archived.
-        :returns: True if archived.
-        """
-        return lib.dc_chat_get_archived(self._dc_chat)
-
    def enable_sending_locations(self, seconds):
        """enable sending locations for this chat.

--- a/python/src/deltachat/const.py
+++ b/python/src/deltachat/const.py
@@ -68,6 +68,7 @@ DC_LP_SMTP_SOCKET_SSL = 0x20000
 DC_LP_SMTP_SOCKET_PLAIN = 0x40000
 DC_CERTCK_AUTO = 0
 DC_CERTCK_STRICT = 1
+DC_CERTCK_ACCEPT_INVALID_HOSTNAMES = 2
 DC_CERTCK_ACCEPT_INVALID_CERTIFICATES = 3
 DC_EMPTY_MVBOX = 0x01
 DC_EMPTY_INBOX = 0x02
--- a/python/src/deltachat/contact.py
+++ b/python/src/deltachat/contact.py
@@ -47,13 +47,3 @@ class Contact(object):
    def is_verified(self):
        """ Return True if the contact is verified. """
        return lib.dc_contact_is_verified(self._dc_contact)
-
-    def get_profile_image(self):
-        """Get contact profile image.
-
-        :returns: path to profile image, None if no profile image exists.
-        """
-        dc_res = lib.dc_contact_get_profile_image(self._dc_contact)
-        if dc_res == ffi.NULL:
-            return None
-        return from_dc_charpointer(dc_res)
--- a/python/src/deltachat/message.py
+++ b/python/src/deltachat/message.py
@@ -1,6 +1,7 @@
 """ The Message object. """

 import os
+import shutil
 from . import props
 from .cutil import from_dc_charpointer, as_dc_charpointer
 from .capi import lib, ffi
@@ -57,6 +58,8 @@ class Message(object):

    def set_text(self, text):
        """set text of this message. """
+        assert self.id > 0, "message not prepared"
+        assert self.is_out_preparing()
        lib.dc_msg_set_text(self._dc_msg, as_dc_charpointer(text))

    @props.with_doc
@@ -69,6 +72,19 @@ class Message(object):
        mtype = ffi.NULL if mime_type is None else as_dc_charpointer(mime_type)
        if not os.path.exists(path):
            raise ValueError("path does not exist: {!r}".format(path))
+        blobdir = self.account.get_blobdir()
+        if not path.startswith(blobdir):
+            for i in range(50):
+                ext = "" if i == 0 else "-" + str(i)
+                dest = os.path.join(blobdir, os.path.basename(path) + ext)
+                if os.path.exists(dest):
+                    continue
+                shutil.copyfile(path, dest)
+                break
+            else:
+                raise ValueError("could not create blobdir-path for {}".format(path))
+            path = dest
+        assert path.startswith(blobdir), path
        lib.dc_msg_set_file(self._dc_msg, as_dc_charpointer(path), mtype)

    @props.with_doc
@@ -174,7 +190,7 @@ class Message(object):
    @property
    def _msgstate(self):
        if self.id == 0:
-            dc_msg = self._dc_msg
+            dc_msg = self.message._dc_msg
        else:
            # load message from db to get a fresh/current state
            dc_msg = ffi.gc(
--- a/python/tests/conftest.py
+++ b/python/tests/conftest.py
@@ -85,21 +85,16 @@ class SessionLiveConfigFromFile:
 class SessionLiveConfigFromURL:
    def __init__(self, url, create_token):
        self.configlist = []
-        self.url = url
-        self.create_token = create_token
-
-    def get(self, index):
-        try:
-            return self.configlist[index]
-        except IndexError:
-            assert index == len(self.configlist), index
-            res = requests.post(self.url, json={"token_create_user": int(self.create_token)})
+        for i in range(2):
+            res = requests.post(url, json={"token_create_user": int(create_token)})
            if res.status_code != 200:
                pytest.skip("creating newtmpuser failed {!r}".format(res))
            d = res.json()
            config = dict(addr=d["email"], mail_pw=d["password"])
            self.configlist.append(config)
-            return config
+
+    def get(self, index):
+        return self.configlist[index]

    def exists(self):
        return bool(self.configlist)
--- a/python/tests/data/d.png
+++ b/python/tests/data/d.png
--- a/python/tests/test_account.py
+++ b/python/tests/test_account.py
@@ -16,14 +16,6 @@ class TestOfflineAccountBasic:
        with pytest.raises(ValueError):
            Account(p.strpath)

-    def test_os_name(self, tmpdir):
-        p = tmpdir.join("hello.db")
-        # we can't easily test if os_name is used in X-Mailer
-        # outgoing messages without a full Online test
-        # but we at least check Account accepts the arg
-        ac1 = Account(p.strpath, os_name="solarpunk")
-        ac1.get_info()
-
    def test_getinfo(self, acfactory):
        ac1 = acfactory.get_unconfigured_account()
        d = ac1.get_info()
@@ -163,18 +155,6 @@ class TestOfflineChat:
        chat.set_name("title2")
        assert chat.get_name() == "title2"

-        d = chat.get_summary()
-        print(d)
-        assert d["id"] == chat.id
-        assert d["type"] == chat.get_type()
-        assert d["name"] == chat.get_name()
-        assert d["archived"] == chat.is_archived()
-        # assert d["param"] == chat.param
-        assert d["color"] == chat.get_color()
-        assert d["profile_image"] == "" if chat.get_profile_image() is None else chat.get_profile_image()
-        assert d["subtitle"] == chat.get_subtitle()
-        assert d["draft"] == "" if chat.get_draft() is None else chat.get_draft()
-
    def test_group_chat_creation_with_translation(self, ac1):
        ac1.set_stock_translation(const.DC_STR_NEWGROUPDRAFT, "xyz %1$s")
        ac1._evlogger.consume_events()
@@ -390,23 +370,6 @@ class TestOfflineChat:
        assert not res.is_ask_verifygroup()
        assert res.contact_id == 10

-    def test_group_chat_many_members_add_remove(self, ac1, lp):
-        lp.sec("ac1: creating group chat with 10 other members")
-        chat = ac1.create_group_chat(name="title1")
-        contacts = []
-        for i in range(10):
-            contact = ac1.create_contact("some{}@example.org".format(i))
-            contacts.append(contact)
-            chat.add_contact(contact)
-
-        num_contacts = len(chat.get_contacts())
-        assert num_contacts == 11
-
-        lp.sec("ac1: removing two contacts and checking things are right")
-        chat.remove_contact(contacts[9])
-        chat.remove_contact(contacts[3])
-        assert len(chat.get_contacts()) == 9
-

 class TestOnlineAccount:
    def get_chat(self, ac1, ac2, both_created=False):
@@ -467,62 +430,6 @@ class TestOnlineAccount:
        assert self_addr not in ev[2]
        ev = ac1._evlogger.get_matching("DC_EVENT_DELETED_BLOB_FILE")

-    def test_send_file_twice_unicode_filename_mangling(self, tmpdir, acfactory, lp):
-        ac1, ac2 = acfactory.get_two_online_accounts()
-        chat = self.get_chat(ac1, ac2)
-
-        basename = "somedäüta.html.zip"
-        p = os.path.join(tmpdir.strpath, basename)
-        with open(p, "w") as f:
-            f.write("some data")
-
-        def send_and_receive_message():
-            lp.sec("ac1: prepare and send attachment + text to ac2")
-            msg1 = Message.new_empty(ac1, "file")
-            msg1.set_text("withfile")
-            msg1.set_file(p)
-            chat.send_msg(msg1)
-
-            lp.sec("ac2: receive message")
-            ev = ac2._evlogger.get_matching("DC_EVENT_INCOMING_MSG|DC_EVENT_MSGS_CHANGED")
-            assert ev[2] > const.DC_CHAT_ID_LAST_SPECIAL
-            return ac2.get_message_by_id(ev[2])
-
-        msg = send_and_receive_message()
-        assert msg.text == "withfile"
-        assert open(msg.filename).read() == "some data"
-        assert msg.filename.endswith(basename)
-
-        msg2 = send_and_receive_message()
-        assert msg2.text == "withfile"
-        assert open(msg2.filename).read() == "some data"
-        assert msg2.filename.endswith("html.zip")
-        assert msg.filename != msg2.filename
-
-    def test_send_file_html_attachment(self, tmpdir, acfactory, lp):
-        ac1, ac2 = acfactory.get_two_online_accounts()
-        chat = self.get_chat(ac1, ac2)
-
-        basename = "test.html"
-        content = "<html><body>text</body>data"
-
-        p = os.path.join(tmpdir.strpath, basename)
-        with open(p, "w") as f:
-            # write wrong html to see if core tries to parse it
-            # (it shouldn't as it's a file attachment)
-            f.write(content)
-
-        lp.sec("ac1: prepare and send attachment + text to ac2")
-        chat.send_file(p, mime_type="text/html")
-
-        lp.sec("ac2: receive message")
-        ev = ac2._evlogger.get_matching("DC_EVENT_INCOMING_MSG|DC_EVENT_MSGS_CHANGED")
-        assert ev[2] > const.DC_CHAT_ID_LAST_SPECIAL
-        msg = ac2.get_message_by_id(ev[2])
-
-        assert open(msg.filename).read() == content
-        assert msg.filename.endswith(basename)
-
    def test_mvbox_sentbox_threads(self, acfactory, lp):
        lp.sec("ac1: start with mvbox thread")
        ac1 = acfactory.get_online_configuring_account(mvbox=True, sentbox=True)
@@ -568,32 +475,27 @@ class TestOnlineAccount:
        ac1._evlogger.get_matching("DC_EVENT_IMAP_MESSAGE_MOVED")
        ac1._evlogger.get_matching("DC_EVENT_IMAP_MESSAGE_MOVED")

-    def test_forward_messages(self, acfactory, lp):
+    def test_forward_messages(self, acfactory):
        ac1, ac2 = acfactory.get_two_online_accounts()
        chat = self.get_chat(ac1, ac2)

-        lp.sec("ac1: send message to ac2")
        msg_out = chat.send_text("message2")

-        lp.sec("ac2: wait for receive")
+        # wait for other account to receive
        ev = ac2._evlogger.get_matching("DC_EVENT_INCOMING_MSG|DC_EVENT_MSGS_CHANGED")
        assert ev[2] == msg_out.id
        msg_in = ac2.get_message_by_id(msg_out.id)
        assert msg_in.text == "message2"

-        lp.sec("ac2: check that the message arrive in deaddrop")
+        # check the message arrived in contact-requests/deaddrop
        chat2 = msg_in.chat
        assert msg_in in chat2.get_messages()
        assert not msg_in.is_forwarded()
        assert chat2.is_deaddrop()
        assert chat2 == ac2.get_deaddrop_chat()
-
-        lp.sec("ac2: create new chat and forward message to it")
        chat3 = ac2.create_group_chat("newgroup")
        assert not chat3.is_promoted()
        ac2.forward_messages([msg_in], chat3)
-
-        lp.sec("ac2: check new chat has a forwarded message")
        assert chat3.is_promoted()
        messages = chat3.get_messages()
        msg = messages[-1]
@@ -640,9 +542,6 @@ class TestOnlineAccount:
    def test_send_and_receive_message_markseen(self, acfactory, lp):
        ac1, ac2 = acfactory.get_two_online_accounts()

-        # make DC's life harder wrt to encodings
-        ac1.set_config("displayname", "ä name")
-
        lp.sec("ac1: create chat with ac2")
        chat = self.get_chat(ac1, ac2)

@@ -660,7 +559,6 @@ class TestOnlineAccount:
        msg_in = ac2.get_message_by_id(msg_out.id)
        assert msg_in.text == "message1"
        assert not msg_in.is_forwarded()
-        assert msg_in.get_sender_contact().display_name == ac1.get_config("displayname")

        lp.sec("check the message arrived in contact-requets/deaddrop")
        chat2 = msg_in.chat
@@ -695,41 +593,6 @@ class TestOnlineAccount:
        except queue.Empty:
            pass  # mark_seen_messages() has generated events before it returns

-    def test_mdn_asymetric(self, acfactory, lp):
-        ac1, ac2 = acfactory.get_two_online_accounts()
-
-        lp.sec("ac1: create chat with ac2")
-        chat = self.get_chat(ac1, ac2, both_created=True)
-
-        # make sure mdns are enabled (usually enabled by default already)
-        ac1.set_config("mdns_enabled", "1")
-        ac2.set_config("mdns_enabled", "1")
-
-        lp.sec("sending text message from ac1 to ac2")
-        msg_out = chat.send_text("message1")
-
-        assert len(chat.get_messages()) == 1
-
-        lp.sec("disable ac1 MDNs")
-        ac1.set_config("mdns_enabled", "0")
-
-        lp.sec("wait for ac2 to receive message")
-        msg = ac2.wait_next_incoming_message()
-
-        assert len(msg.chat.get_messages()) == 1
-
-        lp.sec("ac2: mark incoming message as seen")
-        ac2.mark_seen_messages([msg])
-
-        lp.sec("ac1: waiting for incoming activity")
-        # MDN should be moved even though MDNs are already disabled
-        ac1._evlogger.get_matching("DC_EVENT_IMAP_MESSAGE_MOVED")
-
-        assert len(chat.get_messages()) == 1
-
-        # MDN is received even though MDNs are already disabled
-        assert msg_out.is_out_mdn_received()
-
    def test_send_and_receive_will_encrypt_decrypt(self, acfactory, lp):
        ac1, ac2 = acfactory.get_two_online_accounts()

@@ -758,12 +621,6 @@ class TestOnlineAccount:
        assert msg_back.text == "message-back"
        assert msg_back.is_encrypted()

-        # Test that we do not gossip peer keys in 1-to-1 chat,
-        # as it makes no sense to gossip to peers their own keys.
-        # Gossip is only sent in encrypted messages,
-        # and we sent encrypted msg_back right above.
-        assert chat2b.get_summary()["gossiped_timestamp"] == 0
-
        lp.sec("create group chat with two members, one of which has no encrypt state")
        chat = ac1.create_group_chat("encryption test")
        chat.add_contact(ac1.create_contact(ac2.get_config("addr")))
@@ -772,71 +629,6 @@ class TestOnlineAccount:
        ev = ac1._evlogger.get_matching("DC_EVENT_SMTP_MESSAGE_SENT")
        assert not msg.is_encrypted()

-    def test_send_first_message_as_long_unicode_with_cr(self, acfactory, lp):
-        ac1, ac2 = acfactory.get_two_online_accounts()
-        ac2.set_config("save_mime_headers", "1")
-
-        lp.sec("ac1: create chat with ac2")
-        chat = self.get_chat(ac1, ac2, both_created=True)
-
-        lp.sec("sending multi-line non-unicode message from ac1 to ac2")
-        text1 = "hello\nworld"
-        msg_out = chat.send_text(text1)
-        assert not msg_out.is_encrypted()
-
-        lp.sec("sending multi-line unicode text message from ac1 to ac2")
-        text2 = "äalis\nthis is ßßÄ"
-        msg_out = chat.send_text(text2)
-        assert not msg_out.is_encrypted()
-
-        lp.sec("wait for ac2 to receive multi-line non-unicode message")
-        msg_in = ac2.wait_next_incoming_message()
-        assert msg_in.text == text1
-
-        lp.sec("wait for ac2 to receive multi-line unicode message")
-        msg_in = ac2.wait_next_incoming_message()
-        assert msg_in.text == text2
-        assert ac1.get_config("addr") in msg_in.chat.get_name()
-
-    def test_reply_encrypted(self, acfactory, lp):
-        ac1, ac2 = acfactory.get_two_online_accounts()
-
-        lp.sec("ac1: create chat with ac2")
-        chat = self.get_chat(ac1, ac2)
-
-        lp.sec("sending text message from ac1 to ac2")
-        msg_out = chat.send_text("message1")
-        assert not msg_out.is_encrypted()
-
-        lp.sec("wait for ac2 to receive message")
-        ev = ac2._evlogger.get_matching("DC_EVENT_MSGS_CHANGED")
-        msg_in = ac2.get_message_by_id(msg_out.id)
-        assert msg_in.text == "message1"
-        assert not msg_in.is_encrypted()
-
-        lp.sec("create new chat with contact and send back (encrypted) message")
-        chat2b = ac2.create_chat_by_message(msg_in)
-        chat2b.send_text("message-back")
-
-        lp.sec("wait for ac1 to receive message")
-        ev = ac1._evlogger.get_matching("DC_EVENT_INCOMING_MSG")
-        assert ev[1] == chat.id
-        msg_back = ac1.get_message_by_id(ev[2])
-        assert msg_back.text == "message-back"
-        assert msg_back.is_encrypted()
-
-        lp.sec("ac1: e2ee_enabled=0 and see if reply is encrypted")
-        print("ac1: e2ee_enabled={}".format(ac1.get_config("e2ee_enabled")))
-        print("ac2: e2ee_enabled={}".format(ac2.get_config("e2ee_enabled")))
-        ac1.set_config("e2ee_enabled", "0")
-        chat.send_text("message2 -- should be encrypted")
-
-        lp.sec("wait for ac2 to receive message")
-        ev = ac2._evlogger.get_matching("DC_EVENT_INCOMING_MSG")
-        msg_in = ac2.get_message_by_id(ev[2])
-        assert msg_in.text == "message2 -- should be encrypted"
-        assert msg_in.is_encrypted()
-
    def test_saved_mime_on_received_message(self, acfactory, lp):
        ac1, ac2 = acfactory.get_two_online_accounts()

@@ -1025,54 +817,7 @@ class TestOnlineAccount:
        assert msg.text == "world"
        assert msg.is_encrypted()

-    def test_set_get_contact_avatar(self, acfactory, data, lp):
-        lp.sec("configuring ac1 and ac2")
-        ac1, ac2 = acfactory.get_two_online_accounts()
-
-        lp.sec("ac1: set own profile image")
-        p = data.get_path("d.png")
-        ac1.set_avatar(p)
-
-        lp.sec("ac1: create 1:1 chat with ac2")
-        chat = self.get_chat(ac1, ac2, both_created=True)
-
-        msg = chat.send_text("hi -- do you see my brand new avatar?")
-        assert not msg.is_encrypted()
-
-        lp.sec("ac2: wait for receiving message and avatar from ac1")
-        msg1 = ac2.wait_next_incoming_message()
-        assert not msg1.chat.is_deaddrop()
-        received_path = msg1.get_sender_contact().get_profile_image()
-        assert open(received_path, "rb").read() == open(p, "rb").read()
-
-        lp.sec("ac2: set own profile image")
-        p = data.get_path("d.png")
-        ac2.set_avatar(p)
-
-        lp.sec("ac2: send back message")
-        m = msg1.chat.send_text("yes, i received your avatar -- how do you like mine?")
-        assert m.is_encrypted()
-
-        lp.sec("ac1: wait for receiving message and avatar from ac2")
-        msg2 = ac1.wait_next_incoming_message()
-        received_path = msg2.get_sender_contact().get_profile_image()
-        assert received_path is not None, "did not get avatar through encrypted message"
-        assert open(received_path, "rb").read() == open(p, "rb").read()
-
-        ac2._evlogger.consume_events()
-        ac1._evlogger.consume_events()
-
-        # XXX not sure if the following is correct / possible. you may remove it
-        lp.sec("ac1: delete profile image from chat, and send message to ac2")
-        ac1.set_avatar(None)
-        m = msg2.chat.send_text("i don't like my avatar anymore and removed it")
-        assert m.is_encrypted()
-
-        lp.sec("ac2: wait for message along with avatar deletion of ac1")
-        msg3 = ac2.wait_next_incoming_message()
-        assert msg3.get_sender_contact().get_profile_image() is None
-
-    def test_set_get_group_image(self, acfactory, data, lp):
+    def test_set_get_profile_image(self, acfactory, data, lp):
        ac1, ac2 = acfactory.get_two_online_accounts()

        lp.sec("create unpromoted group chat")
@@ -1174,104 +919,6 @@ class TestOnlineAccount:
        assert not locations3


-class TestGroupStressTests:
-    def test_group_many_members_add_leave_remove(self, acfactory, lp):
-        lp.sec("creating and configuring five accounts")
-        accounts = [acfactory.get_online_configuring_account() for i in range(5)]
-        for acc in accounts:
-            wait_configuration_progress(acc, 1000)
-        ac1 = accounts.pop()
-
-        lp.sec("ac1: setting up contacts with 4 other members")
-        contacts = []
-        for acc, name in zip(accounts, list("äöüsr")):
-            contact = ac1.create_contact(acc.get_config("addr"), name=name)
-            contacts.append(contact)
-
-            # make sure we accept the "hi" message
-            ac1.create_chat_by_contact(contact)
-
-            # make sure the other side accepts our messages
-            c1 = acc.create_contact(ac1.get_config("addr"), "ä member")
-            chat1 = acc.create_chat_by_contact(c1)
-
-            # send a message to get the contact key via autocrypt header
-            chat1.send_text("hi")
-            msg = ac1.wait_next_incoming_message()
-            assert msg.text == "hi"
-
-        # Save fifth account for later
-        ac5 = accounts.pop()
-        contact5 = contacts.pop()
-
-        lp.sec("ac1: creating group chat with 3 other members")
-        chat = ac1.create_group_chat("title1")
-        for contact in contacts:
-            chat.add_contact(contact)
-        assert not chat.is_promoted()
-
-        lp.sec("ac1: send mesage to new group chat")
-        msg = chat.send_text("hello")
-        assert chat.is_promoted()
-        assert msg.is_encrypted()
-
-        gossiped_timestamp = chat.get_summary()["gossiped_timestamp"]
-        assert gossiped_timestamp > 0
-
-        num_contacts = len(chat.get_contacts())
-        assert num_contacts == 3 + 1
-
-        lp.sec("ac2: checking that the chat arrived correctly")
-        ac2 = accounts[0]
-        msg = ac2.wait_next_incoming_message()
-        assert msg.text == "hello"
-        print("chat is", msg.chat)
-        assert len(msg.chat.get_contacts()) == 4
-
-        lp.sec("ac3: checking that 'ac4' is a known contact")
-        ac3 = accounts[1]
-        msg3 = ac3.wait_next_incoming_message()
-        assert msg3.text == "hello"
-        ac3_contacts = ac3.get_contacts()
-        assert len(ac3_contacts) == 3
-        ac4_contacts = ac3.get_contacts(query=accounts[2].get_config("addr"))
-        assert len(ac4_contacts) == 1
-
-        lp.sec("ac2: removing one contact")
-        to_remove = contacts[-1]
-        msg.chat.remove_contact(to_remove)
-
-        lp.sec("ac1: receiving system message about contact removal")
-        sysmsg = ac1.wait_next_incoming_message()
-        assert to_remove.addr in sysmsg.text
-        assert len(sysmsg.chat.get_contacts()) == 3
-
-        # Receiving message about removed contact does not reset gossip
-        assert chat.get_summary()["gossiped_timestamp"] == gossiped_timestamp
-
-        lp.sec("ac1: sending another message to the chat")
-        chat.send_text("hello2")
-        msg = ac2.wait_next_incoming_message()
-        assert msg.text == "hello2"
-        assert chat.get_summary()["gossiped_timestamp"] == gossiped_timestamp
-
-        lp.sec("ac1: adding fifth member to the chat")
-        chat.add_contact(contact5)
-        # Additng contact to chat resets gossiped_timestamp
-        assert chat.get_summary()["gossiped_timestamp"] >= gossiped_timestamp
-
-        lp.sec("ac2: receiving system message about contact addition")
-        sysmsg = ac2.wait_next_incoming_message()
-        assert contact5.addr in sysmsg.text
-        assert len(sysmsg.chat.get_contacts()) == 4
-
-        lp.sec("ac5: waiting for message about addition to the chat")
-        sysmsg = ac5.wait_next_incoming_message()
-        msg = sysmsg.chat.send_text("hello!")
-        # Message should be encrypted because keys of other members are gossiped
-        assert msg.is_encrypted()
-
-
 class TestOnlineConfigureFails:
    def test_invalid_password(self, acfactory):
        ac1, configdict = acfactory.get_online_config()
--- a/python/tests/test_increation.py
+++ b/python/tests/test_increation.py
@@ -1,49 +1,10 @@
 from __future__ import print_function
-
-import os.path
-import shutil
-
-import pytest
 from filecmp import cmp
-
-from conftest import wait_configuration_progress, wait_msgs_changed
 from deltachat import const
+from conftest import wait_configuration_progress, wait_msgs_changed


 class TestOnlineInCreation:
-    def test_increation_not_blobdir(self, tmpdir, acfactory, lp):
-        ac1 = acfactory.get_online_configuring_account()
-        ac2 = acfactory.get_online_configuring_account()
-        wait_configuration_progress(ac1, 1000)
-        wait_configuration_progress(ac2, 1000)
-
-        c2 = ac1.create_contact(email=ac2.get_config("addr"))
-        chat = ac1.create_chat_by_contact(c2)
-
-        lp.sec("Creating in-creation file outside of blobdir")
-        assert tmpdir.strpath != ac1.get_blobdir()
-        src = tmpdir.join('file.txt').ensure(file=1)
-        with pytest.raises(Exception):
-            chat.prepare_message_file(src.strpath)
-
-    def test_no_increation_copies_to_blobdir(self, tmpdir, acfactory, lp):
-        ac1 = acfactory.get_online_configuring_account()
-        ac2 = acfactory.get_online_configuring_account()
-        wait_configuration_progress(ac1, 1000)
-        wait_configuration_progress(ac2, 1000)
-
-        c2 = ac1.create_contact(email=ac2.get_config("addr"))
-        chat = ac1.create_chat_by_contact(c2)
-
-        lp.sec("Creating file outside of blobdir")
-        assert tmpdir.strpath != ac1.get_blobdir()
-        src = tmpdir.join('file.txt')
-        src.write("hello there\n")
-        chat.send_file(src.strpath)
-
-        blob_src = os.path.join(ac1.get_blobdir(), 'file.txt')
-        assert os.path.exists(blob_src), "file.txt not copied to blobdir"
-
    def test_forward_increation(self, acfactory, data, lp):
        ac1 = acfactory.get_online_configuring_account()
        ac2 = acfactory.get_online_configuring_account()
@@ -56,10 +17,7 @@ class TestOnlineInCreation:
        wait_msgs_changed(ac1, 0, 0)  # why no chat id?

        lp.sec("create a message with a file in creation")
-        orig = data.get_path("d.png")
-        path = os.path.join(ac1.get_blobdir(), 'd.png')
-        with open(path, "x") as fp:
-            fp.write("preparing")
+        path = data.get_path("d.png")
        prepared_original = chat.prepare_message_file(path)
        assert prepared_original.is_out_preparing()
        wait_msgs_changed(ac1, chat.id, prepared_original.id)
@@ -80,7 +38,6 @@ class TestOnlineInCreation:

        lp.sec("finish creating the file and send it")
        assert prepared_original.is_out_preparing()
-        shutil.copyfile(orig, path)
        chat.send_prepared(prepared_original)
        assert prepared_original.is_out_pending() or prepared_original.is_out_delivered()
        wait_msgs_changed(ac1, chat.id, prepared_original.id)
@@ -100,13 +57,13 @@ class TestOnlineInCreation:

        lp.sec("wait1 for original or forwarded messages to arrive")
        ev1 = ac2._evlogger.get_matching("DC_EVENT_MSGS_CHANGED")
-        assert ev1[1] > const.DC_CHAT_ID_LAST_SPECIAL
+        assert ev1[1] >= const.DC_CHAT_ID_LAST_SPECIAL
        received_original = ac2.get_message_by_id(ev1[2])
-        assert cmp(received_original.filename, orig, shallow=False)
+        assert cmp(received_original.filename, path, False)

        lp.sec("wait2 for original or forwarded messages to arrive")
        ev2 = ac2._evlogger.get_matching("DC_EVENT_MSGS_CHANGED")
-        assert ev2[1] > const.DC_CHAT_ID_LAST_SPECIAL
+        assert ev2[1] >= const.DC_CHAT_ID_LAST_SPECIAL
        assert ev2[1] != ev1[1]
        received_copy = ac2.get_message_by_id(ev2[2])
-        assert cmp(received_copy.filename, orig, shallow=False)
+        assert cmp(received_copy.filename, path, False)
--- a/python/tox.ini
+++ b/python/tox.ini
@@ -7,7 +7,11 @@ envlist =

 [testenv]
 commands = 
-    pytest -n6 --reruns 2 --reruns-delay 5 -v -rsXx {posargs:tests} 
+    # (some qr tests are pretty heavy in terms of send/received
+    # messages and async-imap's likely has concurrency problems, 
+    # eg https://github.com/async-email/async-imap/issues/4 )
+    pytest -n6 --reruns 3 --reruns-delay 5 -v -rsXx -k "not qr" {posargs:tests} 
+    pytest -n6 --reruns 5 --reruns-delay 5 -v -rsXx -k "qr" {posargs:tests} 
    # python tests/package_wheels.py {toxworkdir}/wheelhouse
 passenv = 
    TRAVIS 
@@ -32,7 +36,7 @@ commands =

 [testenv:lint]
 skipsdist = True
-skip_install = True
+usedevelop = True
 deps =
    flake8
    # pygments required by rst-lint
@@ -65,8 +69,8 @@ commands =


 [pytest]
-addopts = -v -ra
-python_files = tests/test_*.py
+addopts = -v -rs 
+python_files = tests/test_*.py 
 norecursedirs = .tox 
 xfail_strict=true
 timeout = 60 
--- a/set_core_version.py
+++ b/set_core_version.py
@@ -33,8 +33,6 @@ def replace_toml_version(relpath, newversion):
 if __name__ == "__main__":

    if len(sys.argv) < 2:
-        for x in ("Cargo.toml", "deltachat-ffi/Cargo.toml"):
-            print("{}: {}".format(x, read_toml_version(x)))
        raise SystemExit("need argument: new version, example 1.0.0-beta.27")
    newversion = sys.argv[1]
    if newversion.count(".") < 2:
@@ -55,9 +53,7 @@ if __name__ == "__main__":
    replace_toml_version("Cargo.toml", newversion)
    replace_toml_version("deltachat-ffi/Cargo.toml", newversion)

-    subprocess.call(["cargo", "check"])
-    subprocess.call(["git", "add", "-u"])
-    # subprocess.call(["cargo", "update", "-p", "deltachat"])
+    subprocess.call(["cargo", "update", "-p", "deltachat"])

    print("after commit make sure to: ")
    print("")
--- a/spec.md
+++ b/spec.md
@@ -1,6 +1,6 @@
 # Chat-over-Email specification

-Version 0.20.0
+Version 0.19.0

 This document describes how emails can be used
 to implement typical messenger functions
@@ -248,11 +248,11 @@ and the message SHOULD appear as a message or action from the sender.
 A group MAY have a group-image.
 To change or set the group-image,
 the messenger MUST attach an image file to a message
-and MUST add the header `Chat-Group-Avatar`
+and MUST add the header `Chat-Group-Image`
 with the value set to the image name.

 To remove the group-image,
-the messenger MUST add the header `Chat-Group-Avatar: 0`.
+the messenger MUST add the header `Chat-Group-Image: 0`.

 The messenger SHOULD send an explicit mail for each group image change.
 The body of the message SHOULD contain
@@ -265,7 +265,7 @@ and the message SHOULD appear as a message or action from the sender.
    Chat-Version: 1.0
    Chat-Group-ID: 12345uvwxyZ
    Chat-Group-Name: Our Group
-    Chat-Group-Avatar: image.jpg
+    Chat-Group-Image: image.jpg
    Message-ID: Gr.12345uvwxyZ.0005@domain
    Subject: Chat: Our Group: Hello, ...
    Content-Type: multipart/mixed; boundary="==break=="
@@ -283,25 +283,25 @@ and the message SHOULD appear as a message or action from the sender.

 The image format SHOULD be image/jpeg or image/png.
 To save data, it is RECOMMENDED
-to add a `Chat-Group-Avatar` only on image changes.
+to add a `Chat-Group-Image` only on image changes.


 # Set profile image

-A user MAY have a profile-image that MAY be spread to their contacts.
+A user MAY have a profile-image that MAY be spread to his contacts.
 To change or set the profile-image,
 the messenger MUST attach an image file to a message
-and MUST add the header `Chat-User-Avatar`
+and MUST add the header `Chat-Profile-Image`
 with the value set to the image name.

 To remove the profile-image,
-the messenger MUST add the header `Chat-User-Avatar: 0`.
+the messenger MUST add the header `Chat-Profile-Image: 0`.

 To spread the image,
 the messenger MAY send the profile image
 together with the next mail to a given contact
 (to do this only once,
-the messenger has to keep a `user_avatar_update_state` somewhere).
+the messenger has to keep a `profile_image_update_state` somewhere).
 Alternatively, the messenger MAY send an explicit mail
 for each profile-image change to all contacts using a compatible messenger.
 The messenger SHOULD NOT send an explicit mail to normal MUAs.
@@ -309,7 +309,7 @@ The messenger SHOULD NOT send an explicit mail to normal MUAs.
    From: sender@domain
    To: rcpt@domain
    Chat-Version: 1.0
-    Chat-User-Avatar: photo.jpg
+    Chat-Profile-Image: photo.jpg
    Subject: Chat: Hello, ...
    Content-Type: multipart/mixed; boundary="==break=="

@@ -325,10 +325,10 @@ The messenger SHOULD NOT send an explicit mail to normal MUAs.
    --==break==--

 The image format SHOULD be image/jpeg or image/png.
-Note that `Chat-User-Avatar` may appear together with all other headers,
-eg. there may be a `Chat-User-Avatar` and a `Chat-Group-Avatar` header
+Note that `Chat-Profile-Image` may appear together with all other headers,
+eg. there may be a `Chat-Profile-Image` and a `Chat-Group-Image` header
 in the same message.
-To save data, it is RECOMMENDED to add a `Chat-User-Avatar` header
+To save data, it is RECOMMENDED to add a `Chat-Profile-Image` header
 only on image changes.


--- a/src/aheader.rs
+++ b/src/aheader.rs
@@ -76,6 +76,7 @@ impl Aheader {
        if let Ok(Some(value)) = headers.get_first_value("Autocrypt") {
            match Self::from_str(&value) {
                Ok(header) => {
+                    info!(context, "comparing {} - {}", header.addr, wanted_from);
                    if addr_cmp(&header.addr, wanted_from) {
                        return Some(header);
                    }
@@ -95,25 +96,16 @@ impl Aheader {

 impl fmt::Display for Aheader {
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        write!(fmt, "addr={};", self.addr)?;
-        if self.prefer_encrypt == EncryptPreference::Mutual {
-            write!(fmt, " prefer-encrypt=mutual;")?;
-        }
-
-        // adds a whitespace every 78 characters, this allows
-        // email crate to wrap the lines according to RFC 5322
+        // TODO replace 78 with enum /rtn
+        // adds a whitespace every 78 characters, this allows libEtPan to
+        // wrap the lines according to RFC 5322
        // (which may insert a linebreak before every whitespace)
-        let keydata = self.public_key.to_base64().chars().enumerate().fold(
-            String::new(),
-            |mut res, (i, c)| {
-                if i % 78 == 78 - "keydata=".len() {
-                    res.push(' ')
-                }
-                res.push(c);
-                res
-            },
-        );
-        write!(fmt, " keydata={}", keydata)
+        let keydata = self.public_key.to_base64(78);
+        write!(
+            fmt,
+            "addr={}; prefer-encrypt={}; keydata={}",
+            self.addr, self.prefer_encrypt, keydata
+        )
    }
 }

@@ -159,10 +151,13 @@ impl str::FromStr for Aheader {
            }
        };

-        let prefer_encrypt = attributes
+        let prefer_encrypt = match attributes
            .remove("prefer-encrypt")
            .and_then(|raw| raw.parse().ok())
-            .unwrap_or_default();
+        {
+            Some(pref) => pref,
+            None => EncryptPreference::NoPreference,
+        };

        // Autocrypt-Level0: unknown attributes starting with an underscore can be safely ignored
        // Autocrypt-Level0: unknown attribute, treat the header as invalid
@@ -182,13 +177,15 @@ impl str::FromStr for Aheader {
 mod tests {
    use super::*;

-    const RAWKEY: &str = "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";
+    fn rawkey() -> String {
+        "xsBNBFzG3j0BCAC6iNhT8zydvCXi8LI/gFnkadMbfmSE/rTJskRRra/utGbLyDta/yTrJgWL7O3y/g4HdDW/dN2z26Y6W13IMzx9gLInn1KQZChtqWAcr/ReUucXcymwcfg1mdkBGk3TSLeLihN6CJx8Wsv8ig+kgAzte4f5rqEEAJVQ9WZHuti7UiYs6oRzqTo06CRe9owVXxzdMf0VDQtf7ZFm9dpzKKbhH7Lu8880iiotQ9/yRCkDGp9fNThsrLdZiK6OIAcIBAqi2rI89aS1dAmnRbktQieCx5izzyYkR1KvVL3gTTllHOzfKVEC2asmtWu2e4se/+O4WMIS1eGrn7GeWVb0Vwc5ABEBAAHNETxhQEBiLmV4YW1wbGUuZGU+wsCJBBABCAAzAhkBBQJcxt5FAhsDBAsJCAcGFQgJCgsCAxYCARYhBI4xxYKBgH3ANh5cufaKrc9mtiMLAAoJEPaKrc9mtiML938H/18F+3Wf9/JaAy/8hCO1v4S2PVBhxaKCokaNFtkfaMRne2l087LscCFPiFNyb4mv6Z3YeK8Xpxlp2sI0ecvdiqLUOGfnxS6tQrj+83EjtIrZ/hXOk1h121QFWH9Zg2VNHtODXjAgdLDC0NWUrclR0ZOqEDQHeo0ibTILdokVfXFN25wakPmGaYJP2y729cb1ve7RzvIvwn+Dddfxo3ao72rBfLi7l4NQ4S0KsY4cw+/6l5bRCKYCP77wZtvCwUvfVVosLdT43agtSiBI49+ayqvZ8OCvSJa61i+v81brTiEy9GBod4eAp45Ibsuemkw+gon4ZOvUXHTjwFB+h63MrozOwE0EXMbePQEIAL/vauf1zK8JgCu3V+G+SOX0iWw5xUlCPX+ERpBbWfwu3uAqn4wYXD3JDE/fVAF668xiV4eTPtlSUd5h0mn+G7uXMMOtkb+20SoEt50f8zw8TrL9t+ZsV11GKZWJpCar5AhXWsn6EEi8I2hLL5vn55ZZmHuGgN4jjmkRl3ToKCLhaXwTBjCJem7N5EH7F75wErEITa55v4Lb4Nfca7vnvtYrI1OA446xa8gHra0SINelTD09/JM/Fw4sWVPBaRZmJK/Tnu79N23No9XBUubmFPv1pNexZsQclicnTpt/BEWhiun7d6lfGB63K1aoHRTR1pcrWvBuALuuz0gqar2zlI0AEQEAAcLAdgQYAQgAIAUCXMbeRQIbDBYhBI4xxYKBgH3ANh5cufaKrc9mtiMLAAoJEPaKrc9mtiMLKSEIAIyLCRO2OyZ0IYRvRPpMn4p7E+7Pfcz/0mSkOy+1hshgJnqivXurm8zwGrwdMqeV4eslKR9H1RUdWGUQJNbtwmmjrt5DHpIhYHl5t3FpCBaGbV20Omo00Q38lBl9MtrmZkZw+ktEk6X+0xCKssMF+2MADkSOIufbR5HrDVB89VZOHCO9DeXvCUUAw2hyJiL/LHmLzJ40zYoTmb+F//f0k0j+tRdbkefyRoCmwG7YGiT+2hnCdgcezswnzah5J3ZKlrg7jOGo1LxtbvNUzxNBbC6S/aNgwm6qxo7xegRhmEl5uZ16zwyj4qz+xkjGy25Of5mWfUDoNw7OT7sjUbHOOMc=".into()
+    }

    #[test]
    fn test_from_str() {
        let h: Aheader = format!(
            "addr=me@mail.com; prefer-encrypt=mutual; keydata={}",
-            RAWKEY
+            rawkey()
        )
        .parse()
        .expect("failed to parse");
@@ -197,22 +194,9 @@ mod tests {
        assert_eq!(h.prefer_encrypt, EncryptPreference::Mutual);
    }

-    // EncryptPreference::Reset is an internal value, parser should never return it
-    #[test]
-    fn test_from_str_reset() {
-        let raw = format!(
-            "addr=reset@example.com; prefer-encrypt=reset; keydata={}",
-            RAWKEY
-        );
-        let h: Aheader = raw.parse().expect("failed to parse");
-
-        assert_eq!(h.addr, "reset@example.com");
-        assert_eq!(h.prefer_encrypt, EncryptPreference::NoPreference);
-    }
-
    #[test]
    fn test_from_str_non_critical() {
-        let raw = format!("addr=me@mail.com; _foo=one; _bar=two; keydata={}", RAWKEY);
+        let raw = format!("addr=me@mail.com; _foo=one; _bar=two; keydata={}", rawkey());
        let h: Aheader = raw.parse().expect("failed to parse");

        assert_eq!(h.addr, "me@mail.com");
@@ -223,57 +207,33 @@ mod tests {
    fn test_from_str_superflous_critical() {
        let raw = format!(
            "addr=me@mail.com; _foo=one; _bar=two; other=me; keydata={}",
-            RAWKEY
+            rawkey()
        );
        assert!(raw.parse::<Aheader>().is_err());
    }

    #[test]
    fn test_good_headers() {
-        let fixed_header = concat!(
-            "addr=a@b.example.org; prefer-encrypt=mutual; ",
-            "keydata=xsBNBFzG3j0BCAC6iNhT8zydvCXi8LI/gFnkadMbfmSE/rTJskRRra/utGbLyDta/yTrJg",
-            " WL7O3y/g4HdDW/dN2z26Y6W13IMzx9gLInn1KQZChtqWAcr/ReUucXcymwcfg1mdkBGk3TSLeLihN6",
-            " CJx8Wsv8ig+kgAzte4f5rqEEAJVQ9WZHuti7UiYs6oRzqTo06CRe9owVXxzdMf0VDQtf7ZFm9dpzKK",
-            " bhH7Lu8880iiotQ9/yRCkDGp9fNThsrLdZiK6OIAcIBAqi2rI89aS1dAmnRbktQieCx5izzyYkR1Kv",
-            " VL3gTTllHOzfKVEC2asmtWu2e4se/+O4WMIS1eGrn7GeWVb0Vwc5ABEBAAHNETxhQEBiLmV4YW1wbG",
-            " UuZGU+wsCJBBABCAAzAhkBBQJcxt5FAhsDBAsJCAcGFQgJCgsCAxYCARYhBI4xxYKBgH3ANh5cufaK",
-            " rc9mtiMLAAoJEPaKrc9mtiML938H/18F+3Wf9/JaAy/8hCO1v4S2PVBhxaKCokaNFtkfaMRne2l087",
-            " LscCFPiFNyb4mv6Z3YeK8Xpxlp2sI0ecvdiqLUOGfnxS6tQrj+83EjtIrZ/hXOk1h121QFWH9Zg2VN",
-            " HtODXjAgdLDC0NWUrclR0ZOqEDQHeo0ibTILdokVfXFN25wakPmGaYJP2y729cb1ve7RzvIvwn+Ddd",
-            " fxo3ao72rBfLi7l4NQ4S0KsY4cw+/6l5bRCKYCP77wZtvCwUvfVVosLdT43agtSiBI49+ayqvZ8OCv",
-            " SJa61i+v81brTiEy9GBod4eAp45Ibsuemkw+gon4ZOvUXHTjwFB+h63MrozOwE0EXMbePQEIAL/vau",
-            " f1zK8JgCu3V+G+SOX0iWw5xUlCPX+ERpBbWfwu3uAqn4wYXD3JDE/fVAF668xiV4eTPtlSUd5h0mn+",
-            " G7uXMMOtkb+20SoEt50f8zw8TrL9t+ZsV11GKZWJpCar5AhXWsn6EEi8I2hLL5vn55ZZmHuGgN4jjm",
-            " kRl3ToKCLhaXwTBjCJem7N5EH7F75wErEITa55v4Lb4Nfca7vnvtYrI1OA446xa8gHra0SINelTD09",
-            " /JM/Fw4sWVPBaRZmJK/Tnu79N23No9XBUubmFPv1pNexZsQclicnTpt/BEWhiun7d6lfGB63K1aoHR",
-            " TR1pcrWvBuALuuz0gqar2zlI0AEQEAAcLAdgQYAQgAIAUCXMbeRQIbDBYhBI4xxYKBgH3ANh5cufaK",
-            " rc9mtiMLAAoJEPaKrc9mtiMLKSEIAIyLCRO2OyZ0IYRvRPpMn4p7E+7Pfcz/0mSkOy+1hshgJnqivX",
-            " urm8zwGrwdMqeV4eslKR9H1RUdWGUQJNbtwmmjrt5DHpIhYHl5t3FpCBaGbV20Omo00Q38lBl9Mtrm",
-            " ZkZw+ktEk6X+0xCKssMF+2MADkSOIufbR5HrDVB89VZOHCO9DeXvCUUAw2hyJiL/LHmLzJ40zYoTmb",
-            " +F//f0k0j+tRdbkefyRoCmwG7YGiT+2hnCdgcezswnzah5J3ZKlrg7jOGo1LxtbvNUzxNBbC6S/aNg",
-            " wm6qxo7xegRhmEl5uZ16zwyj4qz+xkjGy25Of5mWfUDoNw7OT7sjUbHOOMc="
-        );
+        let fixed_header = "addr=a@b.example.org; prefer-encrypt=mutual; keydata=xsBNBFzG3j0BCAC6iNhT8zydvCXi8LI/gFnkadMbfmSE/rTJskRRra/utGbLyDta/yTrJgWL7O3y/g 4HdDW/dN2z26Y6W13IMzx9gLInn1KQZChtqWAcr/ReUucXcymwcfg1mdkBGk3TSLeLihN6CJx8Wsv8 ig+kgAzte4f5rqEEAJVQ9WZHuti7UiYs6oRzqTo06CRe9owVXxzdMf0VDQtf7ZFm9dpzKKbhH7Lu88 80iiotQ9/yRCkDGp9fNThsrLdZiK6OIAcIBAqi2rI89aS1dAmnRbktQieCx5izzyYkR1KvVL3gTTll HOzfKVEC2asmtWu2e4se/+O4WMIS1eGrn7GeWVb0Vwc5ABEBAAHNETxhQEBiLmV4YW1wbGUuZGU+ws CJBBABCAAzAhkBBQJcxt5FAhsDBAsJCAcGFQgJCgsCAxYCARYhBI4xxYKBgH3ANh5cufaKrc9mtiML AAoJEPaKrc9mtiML938H/18F+3Wf9/JaAy/8hCO1v4S2PVBhxaKCokaNFtkfaMRne2l087LscCFPiF Nyb4mv6Z3YeK8Xpxlp2sI0ecvdiqLUOGfnxS6tQrj+83EjtIrZ/hXOk1h121QFWH9Zg2VNHtODXjAg dLDC0NWUrclR0ZOqEDQHeo0ibTILdokVfXFN25wakPmGaYJP2y729cb1ve7RzvIvwn+Dddfxo3ao72 rBfLi7l4NQ4S0KsY4cw+/6l5bRCKYCP77wZtvCwUvfVVosLdT43agtSiBI49+ayqvZ8OCvSJa61i+v 81brTiEy9GBod4eAp45Ibsuemkw+gon4ZOvUXHTjwFB+h63MrozOwE0EXMbePQEIAL/vauf1zK8JgC u3V+G+SOX0iWw5xUlCPX+ERpBbWfwu3uAqn4wYXD3JDE/fVAF668xiV4eTPtlSUd5h0mn+G7uXMMOt kb+20SoEt50f8zw8TrL9t+ZsV11GKZWJpCar5AhXWsn6EEi8I2hLL5vn55ZZmHuGgN4jjmkRl3ToKC LhaXwTBjCJem7N5EH7F75wErEITa55v4Lb4Nfca7vnvtYrI1OA446xa8gHra0SINelTD09/JM/Fw4s WVPBaRZmJK/Tnu79N23No9XBUubmFPv1pNexZsQclicnTpt/BEWhiun7d6lfGB63K1aoHRTR1pcrWv BuALuuz0gqar2zlI0AEQEAAcLAdgQYAQgAIAUCXMbeRQIbDBYhBI4xxYKBgH3ANh5cufaKrc9mtiML AAoJEPaKrc9mtiMLKSEIAIyLCRO2OyZ0IYRvRPpMn4p7E+7Pfcz/0mSkOy+1hshgJnqivXurm8zwGr wdMqeV4eslKR9H1RUdWGUQJNbtwmmjrt5DHpIhYHl5t3FpCBaGbV20Omo00Q38lBl9MtrmZkZw+ktE k6X+0xCKssMF+2MADkSOIufbR5HrDVB89VZOHCO9DeXvCUUAw2hyJiL/LHmLzJ40zYoTmb+F//f0k0 j+tRdbkefyRoCmwG7YGiT+2hnCdgcezswnzah5J3ZKlrg7jOGo1LxtbvNUzxNBbC6S/aNgwm6qxo7x egRhmEl5uZ16zwyj4qz+xkjGy25Of5mWfUDoNw7OT7sjUbHOOMc=";

        let ah = Aheader::from_str(fixed_header).expect("failed to parse");
        assert_eq!(ah.addr, "a@b.example.org");
        assert_eq!(ah.prefer_encrypt, EncryptPreference::Mutual);
-        assert_eq!(format!("{}", ah), fixed_header);

        let rendered = ah.to_string();
        assert_eq!(rendered, fixed_header);

-        let ah = Aheader::from_str(&format!(" _foo; __FOO=BAR ;;; addr = a@b.example.org ;\r\n   prefer-encrypt = mutual ; keydata = {}", RAWKEY)).expect("failed to parse");
+        let ah = Aheader::from_str(&format!(" _foo; __FOO=BAR ;;; addr = a@b.example.org ;\r\n   prefer-encrypt = mutual ; keydata = {}", rawkey())).expect("failed to parse");
        assert_eq!(ah.addr, "a@b.example.org");
        assert_eq!(ah.prefer_encrypt, EncryptPreference::Mutual);

        Aheader::from_str(&format!(
            "addr=a@b.example.org; prefer-encrypt=ignoreUnknownValues; keydata={}",
-            RAWKEY
+            rawkey()
        ))
        .expect("failed to parse");

-        Aheader::from_str(&format!("addr=a@b.example.org; keydata={}", RAWKEY))
+        Aheader::from_str(&format!("addr=a@b.example.org; keydata={}", rawkey()))
            .expect("failed to parse");
    }

@@ -285,30 +245,4 @@ mod tests {
        assert!(Aheader::from_str(" ;;").is_err());
        assert!(Aheader::from_str("addr=a@t.de; unknwon=1; keydata=jau").is_err());
    }
-
-    #[test]
-    fn test_display_aheader() {
-        assert!(format!(
-            "{}",
-            Aheader::new(
-                "test@example.com".to_string(),
-                Key::from_base64(RAWKEY, KeyType::Public).unwrap(),
-                EncryptPreference::Mutual
-            )
-        )
-        .contains("prefer-encrypt=mutual;"));
-
-        // According to Autocrypt Level 1 specification,
-        // only "prefer-encrypt=mutual;" can be used.
-        // If the setting is nopreference, the whole attribute is omitted.
-        assert!(!format!(
-            "{}",
-            Aheader::new(
-                "test@example.com".to_string(),
-                Key::from_base64(RAWKEY, KeyType::Public).unwrap(),
-                EncryptPreference::NoPreference
-            )
-        )
-        .contains("prefer-encrypt"));
-    }
 }
--- a/src/blob.rs
+++ b/src/blob.rs
@@ -6,13 +6,9 @@ use std::fs;
 use std::io::Write;
 use std::path::{Path, PathBuf};

-use self::image::GenericImageView;
-use crate::constants::AVATAR_SIZE;
 use crate::context::Context;
 use crate::events::Event;

-extern crate image;
-
 /// Represents a file in the blob directory.
 ///
 /// The object has a name, which will always be valid UTF-8.  Having a
@@ -163,7 +159,7 @@ impl<'a> BlobObject<'a> {
    /// This merely delegates to the [BlobObject::create_and_copy] and
    /// the [BlobObject::from_path] methods.  See those for possible
    /// errors.
-    pub fn new_from_path(
+    pub fn create_from_path(
        context: &Context,
        src: impl AsRef<Path>,
    ) -> std::result::Result<BlobObject, BlobError> {
@@ -353,31 +349,6 @@ impl<'a> BlobObject<'a> {
        }
        true
    }
-
-    pub fn recode_to_avatar_size(&self, context: &Context) -> Result<(), BlobError> {
-        let blob_abs = self.to_abs_path();
-        let img = image::open(&blob_abs).map_err(|err| BlobError::RecodeFailure {
-            blobdir: context.get_blobdir().to_path_buf(),
-            blobname: blob_abs.to_str().unwrap_or_default().to_string(),
-            cause: err,
-            backtrace: failure::Backtrace::new(),
-        })?;
-
-        if img.width() <= AVATAR_SIZE && img.height() <= AVATAR_SIZE {
-            return Ok(());
-        }
-
-        let img = img.thumbnail(AVATAR_SIZE, AVATAR_SIZE);
-
-        img.save(&blob_abs).map_err(|err| BlobError::WriteFailure {
-            blobdir: context.get_blobdir().to_path_buf(),
-            blobname: blob_abs.to_str().unwrap_or_default().to_string(),
-            cause: err,
-            backtrace: failure::Backtrace::new(),
-        })?;
-
-        Ok(())
-    }
 }

 impl<'a> fmt::Display for BlobObject<'a> {
@@ -411,13 +382,6 @@ pub enum BlobError {
        cause: std::io::Error,
        backtrace: failure::Backtrace,
    },
-    RecodeFailure {
-        blobdir: PathBuf,
-        blobname: String,
-        #[cause]
-        cause: image::ImageError,
-        backtrace: failure::Backtrace,
-    },
    WrongBlobdir {
        blobdir: PathBuf,
        src: PathBuf,
@@ -465,9 +429,6 @@ impl fmt::Display for BlobError {
                blobname,
                blobdir.display(),
            ),
-            BlobError::RecodeFailure {
-                blobdir, blobname, ..
-            } => write!(f, "Failed to recode {} in {}", blobname, blobdir.display(),),
            BlobError::WrongBlobdir { blobdir, src, .. } => write!(
                f,
                "File path {} is not in blobdir {}",
@@ -522,23 +483,23 @@ mod tests {
    #[test]
    fn test_suffix() {
        let t = dummy_context();
-        let blob = BlobObject::create(&t.ctx, "foo.txt", b"hello").unwrap();
-        assert_eq!(blob.suffix(), Some("txt"));
-        let blob = BlobObject::create(&t.ctx, "bar", b"world").unwrap();
-        assert_eq!(blob.suffix(), None);
+        let foo = BlobObject::create(&t.ctx, "foo.txt", b"hello").unwrap();
+        assert_eq!(foo.suffix(), Some("txt"));
+        let bar = BlobObject::create(&t.ctx, "bar", b"world").unwrap();
+        assert_eq!(bar.suffix(), None);
    }

    #[test]
    fn test_create_dup() {
        let t = dummy_context();
        BlobObject::create(&t.ctx, "foo.txt", b"hello").unwrap();
-        let foo_path = t.ctx.get_blobdir().join("foo.txt");
-        assert!(foo_path.exists());
+        let foo = t.ctx.get_blobdir().join("foo.txt");
+        assert!(foo.exists());
        BlobObject::create(&t.ctx, "foo.txt", b"world").unwrap();
        for dirent in fs::read_dir(t.ctx.get_blobdir()).unwrap() {
            let fname = dirent.unwrap().file_name();
-            if fname == foo_path.file_name().unwrap() {
-                assert_eq!(fs::read(&foo_path).unwrap(), b"hello");
+            if fname == foo.file_name().unwrap() {
+                assert_eq!(fs::read(&foo).unwrap(), b"hello");
            } else {
                let name = fname.to_str().unwrap();
                assert!(name.starts_with("foo"));
@@ -551,13 +512,13 @@ mod tests {
    fn test_double_ext_preserved() {
        let t = dummy_context();
        BlobObject::create(&t.ctx, "foo.tar.gz", b"hello").unwrap();
-        let foo_path = t.ctx.get_blobdir().join("foo.tar.gz");
-        assert!(foo_path.exists());
+        let foo = t.ctx.get_blobdir().join("foo.tar.gz");
+        assert!(foo.exists());
        BlobObject::create(&t.ctx, "foo.tar.gz", b"world").unwrap();
        for dirent in fs::read_dir(t.ctx.get_blobdir()).unwrap() {
            let fname = dirent.unwrap().file_name();
-            if fname == foo_path.file_name().unwrap() {
-                assert_eq!(fs::read(&foo_path).unwrap(), b"hello");
+            if fname == foo.file_name().unwrap() {
+                assert_eq!(fs::read(&foo).unwrap(), b"hello");
            } else {
                let name = fname.to_str().unwrap();
                println!("{}", name);
@@ -598,14 +559,14 @@ mod tests {

        let src_ext = t.dir.path().join("external");
        fs::write(&src_ext, b"boo").unwrap();
-        let blob = BlobObject::new_from_path(&t.ctx, &src_ext).unwrap();
+        let blob = BlobObject::create_from_path(&t.ctx, &src_ext).unwrap();
        assert_eq!(blob.as_name(), "$BLOBDIR/external");
        let data = fs::read(blob.to_abs_path()).unwrap();
        assert_eq!(data, b"boo");

        let src_int = t.ctx.get_blobdir().join("internal");
        fs::write(&src_int, b"boo").unwrap();
-        let blob = BlobObject::new_from_path(&t.ctx, &src_int).unwrap();
+        let blob = BlobObject::create_from_path(&t.ctx, &src_int).unwrap();
        assert_eq!(blob.as_name(), "$BLOBDIR/internal");
        let data = fs::read(blob.to_abs_path()).unwrap();
        assert_eq!(data, b"boo");
@@ -615,7 +576,7 @@ mod tests {
        let t = dummy_context();
        let src_ext = t.dir.path().join("autocrypt-setup-message-4137848473.html");
        fs::write(&src_ext, b"boo").unwrap();
-        let blob = BlobObject::new_from_path(&t.ctx, &src_ext).unwrap();
+        let blob = BlobObject::create_from_path(&t.ctx, &src_ext).unwrap();
        assert_eq!(
            blob.as_name(),
            "$BLOBDIR/autocrypt-setup-message-4137848473.html"
--- a/src/chat.rs
+++ b/src/chat.rs
--- a/src/chatlist.rs
+++ b/src/chatlist.rs
@@ -60,7 +60,7 @@ impl Chatlist {
    ///   or "Not now".
    ///   The UI can also offer a "Close" button that calls dc_marknoticed_contact() then.
    /// - DC_CHAT_ID_ARCHIVED_LINK (6) - this special chat is present if the user has
-    ///   archived *any* chat using dc_archive_chat(). The UI should show a link as
+    ///   archived _any_ chat using dc_archive_chat(). The UI should show a link as
    ///   "Show archived chats", if the user clicks this item, the UI should show a
    ///   list of all archived chats that can be created by this function hen using
    ///   the DC_GCL_ARCHIVED_ONLY flag.
@@ -71,7 +71,7 @@ impl Chatlist {
    /// The `listflags` is a combination of flags:
    /// - if the flag DC_GCL_ARCHIVED_ONLY is set, only archived chats are returned.
    ///   if DC_GCL_ARCHIVED_ONLY is not set, only unarchived chats are returned and
-    ///   the pseudo-chat DC_CHAT_ID_ARCHIVED_LINK is added if there are *any* archived
+    ///   the pseudo-chat DC_CHAT_ID_ARCHIVED_LINK is added if there are _any_ archived
    ///   chats
    /// - if the flag DC_GCL_NO_SPECIALS is set, deaddrop and archive link are not added
    ///   to the list (may be used eg. for selecting chats on forwarding, the flag is
@@ -162,12 +162,6 @@ impl Chatlist {
            let query = query.trim().to_string();
            ensure!(!query.is_empty(), "missing query");

-            // allow searching over special names that may change at any time
-            // when the ui calls set_stock_translation()
-            if let Err(err) = update_special_chat_names(context) {
-                warn!(context, "cannot update special chat names: {:?}", err)
-            }
-
            let str_like_cmd = format!("%{}%", query);
            context.sql.query_map(
                "SELECT c.id, m.id
@@ -320,7 +314,7 @@ impl Chatlist {
    }
 }

-/// Returns the number of archived chats
+/// Get the number of archived chats
 pub fn dc_get_archived_cnt(context: &Context) -> u32 {
    context
        .sql
@@ -390,27 +384,4 @@ mod tests {
        let chats = Chatlist::try_load(&t.ctx, DC_GCL_ARCHIVED_ONLY, None, None).unwrap();
        assert_eq!(chats.len(), 1);
    }
-
-    #[test]
-    fn test_search_special_chat_names() {
-        let t = dummy_context();
-        t.ctx.update_device_chats().unwrap();
-
-        let chats = Chatlist::try_load(&t.ctx, 0, Some("t-1234-s"), None).unwrap();
-        assert_eq!(chats.len(), 0);
-        let chats = Chatlist::try_load(&t.ctx, 0, Some("t-5678-b"), None).unwrap();
-        assert_eq!(chats.len(), 0);
-
-        t.ctx
-            .set_stock_translation(StockMessage::SavedMessages, "test-1234-save".to_string())
-            .unwrap();
-        let chats = Chatlist::try_load(&t.ctx, 0, Some("t-1234-s"), None).unwrap();
-        assert_eq!(chats.len(), 1);
-
-        t.ctx
-            .set_stock_translation(StockMessage::DeviceMessages, "test-5678-babbel".to_string())
-            .unwrap();
-        let chats = Chatlist::try_load(&t.ctx, 0, Some("t-5678-b"), None).unwrap();
-        assert_eq!(chats.len(), 1);
-    }
 }
--- a/src/config.rs
+++ b/src/config.rs
@@ -9,7 +9,6 @@ use crate::context::Context;
 use crate::dc_tools::*;
 use crate::job::*;
 use crate::stock::StockMessage;
-use rusqlite::NO_PARAMS;

 /// The available configuration keys.
 #[derive(
@@ -128,23 +127,13 @@ impl Context {
    /// If `None` is passed as a value the value is cleared and set to the default if there is one.
    pub fn set_config(&self, key: Config, value: Option<&str>) -> crate::sql::Result<()> {
        match key {
-            Config::Selfavatar => {
-                self.sql
-                    .execute("UPDATE contacts SET selfavatar_sent=0;", NO_PARAMS)?;
-                self.sql
-                    .set_raw_config_bool(self, "attach_selfavatar", true)?;
-                match value {
-                    Some(value) => {
-                        let blob = BlobObject::new_from_path(&self, value)?;
-                        blob.recode_to_avatar_size(self)?;
-                        self.sql.set_raw_config(self, key, Some(blob.as_name()))
-                    }
-                    None => self.sql.set_raw_config(self, key, None),
-                }
+            Config::Selfavatar if value.is_some() => {
+                let blob = BlobObject::create_from_path(&self, value.unwrap())?;
+                self.sql.set_raw_config(self, key, Some(blob.as_name()))
            }
            Config::InboxWatch => {
                let ret = self.sql.set_raw_config(self, key, value);
-                interrupt_inbox_idle(self);
+                interrupt_inbox_idle(self, true);
                ret
            }
            Config::SentboxWatch => {
@@ -191,8 +180,6 @@ mod tests {
    use std::string::ToString;

    use crate::test_utils::*;
-    use std::fs::File;
-    use std::io::Write;

    #[test]
    fn test_to_string() {
@@ -212,17 +199,16 @@ mod tests {
    }

    #[test]
-    fn test_selfavatar_outside_blobdir() -> failure::Fallible<()> {
+    fn test_selfavatar() -> failure::Fallible<()> {
        let t = dummy_context();
        let avatar_src = t.dir.path().join("avatar.jpg");
-        let avatar_bytes = include_bytes!("../test-data/image/avatar1000x1000.jpg");
-        File::create(&avatar_src)?.write_all(avatar_bytes)?;
+        std::fs::write(&avatar_src, b"avatar")?;
        let avatar_blob = t.ctx.get_blobdir().join("avatar.jpg");
        assert!(!avatar_blob.exists());
        t.ctx
            .set_config(Config::Selfavatar, Some(&avatar_src.to_str().unwrap()))?;
        assert!(avatar_blob.exists());
-        assert!(std::fs::metadata(&avatar_blob).unwrap().len() < avatar_bytes.len() as u64);
+        assert_eq!(std::fs::read(&avatar_blob)?, b"avatar");
        let avatar_cfg = t.ctx.get_config(Config::Selfavatar);
        assert_eq!(avatar_cfg, avatar_blob.to_str().map(|s| s.to_string()));
        Ok(())
@@ -232,8 +218,7 @@ mod tests {
    fn test_selfavatar_in_blobdir() -> failure::Fallible<()> {
        let t = dummy_context();
        let avatar_src = t.ctx.get_blobdir().join("avatar.jpg");
-        let avatar_bytes = include_bytes!("../test-data/image/avatar1000x1000.jpg");
-        File::create(&avatar_src)?.write_all(avatar_bytes)?;
+        std::fs::write(&avatar_src, b"avatar")?;
        t.ctx
            .set_config(Config::Selfavatar, Some(&avatar_src.to_str().unwrap()))?;
        let avatar_cfg = t.ctx.get_config(Config::Selfavatar);
--- a/src/configure/auto_mozilla.rs
+++ b/src/configure/auto_mozilla.rs
@@ -1,6 +1,8 @@
 //! # Thunderbird's Autoconfiguration implementation
 //!
 //! Documentation: https://developer.mozilla.org/en-US/docs/Mozilla/Thunderbird/Autoconfiguration */
+use failure::Fail;
+
 use quick_xml;
 use quick_xml::events::{BytesEnd, BytesStart, BytesText};

@@ -72,7 +74,7 @@ fn parse_xml(in_emailaddr: &str, xml_raw: &str) -> Result<LoginParam> {
    // Split address into local part and domain part.
    let p = in_emailaddr
        .find('@')
-        .ok_or_else(|| Error::InvalidEmailAddress(in_emailaddr.to_string()))?;
+        .ok_or(Error::InvalidEmailAddress(in_emailaddr.to_string()))?;
    let (in_emaillocalpart, in_emaildomain) = in_emailaddr.split_at(p);
    let in_emaildomain = &in_emaildomain[1..];

@@ -128,14 +130,13 @@ pub fn moz_autoconfigure(
 ) -> Result<LoginParam> {
    let xml_raw = read_url(context, url)?;

-    let res = parse_xml(&param_in.addr, &xml_raw);
-    if let Err(err) = &res {
+    parse_xml(&param_in.addr, &xml_raw).map_err(|err| {
        warn!(
            context,
            "Failed to parse Thunderbird autoconfiguration XML: {}", err
        );
-    }
-    res
+        err.into()
+    })
 }

 fn moz_autoconfigure_text_cb<B: std::io::BufRead>(
--- a/src/configure/auto_outlook.rs
+++ b/src/configure/auto_outlook.rs
@@ -1,5 +1,7 @@
 //! Outlook's Autodiscover

+use failure::Fail;
+
 use quick_xml;
 use quick_xml::events::BytesEnd;

--- a/src/configure/mod.rs
+++ b/src/configure/mod.rs
@@ -6,15 +6,13 @@ mod read_url;

 use percent_encoding::{utf8_percent_encode, NON_ALPHANUMERIC};

-use async_std::task;
-
 use crate::config::Config;
 use crate::constants::*;
 use crate::context::Context;
 use crate::dc_tools::*;
 use crate::e2ee;
-use crate::job::{self, job_add, job_kill_action};
-use crate::login_param::{CertificateChecks, LoginParam};
+use crate::job::*;
+use crate::login_param::LoginParam;
 use crate::oauth2::*;
 use crate::param::Params;

@@ -37,8 +35,8 @@ pub fn configure(context: &Context) {
        warn!(context, "There is already another ongoing process running.",);
        return;
    }
-    job_kill_action(context, job::Action::ConfigureImap);
-    job_add(context, job::Action::ConfigureImap, 0, Params::new(), 0);
+    job_kill_action(context, Action::ConfigureImap);
+    job_add(context, Action::ConfigureImap, 0, Params::new(), 0);
 }

 /// Check if the context is already configured.
@@ -50,15 +48,15 @@ pub fn dc_is_configured(context: &Context) -> bool {
 * Configure JOB
 ******************************************************************************/
 #[allow(non_snake_case, unused_must_use)]
-pub fn JobConfigureImap(context: &Context) -> job::Status {
+pub fn JobConfigureImap(context: &Context) {
    if !context.sql.is_open() {
        error!(context, "Cannot configure, database not opened.",);
        progress!(context, 0);
-        return job::Status::Finished(Err(format_err!("Database not opened")));
+        return;
    }
    if !context.alloc_ongoing() {
        progress!(context, 0);
-        return job::Status::Finished(Err(format_err!("Cannot allocated ongoing process")));
+        return;
    }
    let mut success = false;
    let mut imap_connected_here = false;
@@ -94,11 +92,9 @@ pub fn JobConfigureImap(context: &Context) -> job::Status {
    let mut param_domain = "undefined.undefined".to_owned();
    let mut param_addr_urlencoded: String =
        "Internal Error: this value should never be used".to_owned();
-    let mut keep_flags = 0;
-
-    const STEP_12_USE_AUTOCONFIG: u8 = 12;
-    const STEP_13_AFTER_AUTOCONFIG: u8 = 13;
+    let mut keep_flags = std::i32::MAX;

+    const STEP_3_INDEX: u8 = 13;
    let mut step_counter: u8 = 0;
    while !context.shall_stop_ongoing() {
        step_counter += 1;
@@ -114,7 +110,7 @@ pub fn JobConfigureImap(context: &Context) -> job::Status {
            }
            // Step 1: Load the parameters and check email-address and password
            2 => {
-                if 0 != param.server_flags & DC_LP_AUTH_OAUTH2 {
+                if 0 != param.server_flags & 0x2 {
                    // the used oauth2 addr may differ, check this.
                    // if dc_get_oauth2_addr() is not available in the oauth2 implementation,
                    // just use the given one.
@@ -149,7 +145,6 @@ pub fn JobConfigureImap(context: &Context) -> job::Status {
            // Step 2: Autoconfig
            4 => {
                progress!(context, 200);
-
                if param.mail_server.is_empty()
                            && param.mail_port == 0
                            /*&&param.mail_user.is_empty() -- the user can enter a loginname which is used by autoconfig then */
@@ -157,18 +152,12 @@ pub fn JobConfigureImap(context: &Context) -> job::Status {
                            && param.send_port == 0
                            && param.send_user.is_empty()
                            /*&&param.send_pw.is_empty() -- the password cannot be auto-configured and is no criterion for autoconfig or not */
-                            && (param.server_flags & !DC_LP_AUTH_OAUTH2) == 0
+                            && param.server_flags & !0x2 == 0
                {
-                    // no advanced parameters entered by the user: query provider-database or do Autoconfig
-                    keep_flags = param.server_flags & DC_LP_AUTH_OAUTH2;
-                    if let Some(new_param) = get_offline_autoconfig(context, &param) {
-                        // got parameters from our provider-database, skip Autoconfig, preserve the OAuth2 setting
-                        param_autoconfig = Some(new_param);
-                        step_counter = STEP_12_USE_AUTOCONFIG - 1; // minus one as step_counter is increased on next loop
-                    }
+                    keep_flags = param.server_flags & 0x2;
                } else {
-                    // advanced parameters entered by the user: skip Autoconfig
-                    step_counter = STEP_13_AFTER_AUTOCONFIG - 1; // minus one as step_counter is increased on next loop
+                    // Autoconfig is not needed so skip it.
+                    step_counter = STEP_3_INDEX - 1;
                }
                true
            }
@@ -253,10 +242,8 @@ pub fn JobConfigureImap(context: &Context) -> job::Status {
                }
                true
            }
-            /* C.  Do we have any autoconfig result?
-               If you change the match-number here, also update STEP_12_COPY_AUTOCONFIG above
-            */
-            STEP_12_USE_AUTOCONFIG => {
+            /* C.  Do we have any result? */
+            12 => {
                progress!(context, 500);
                if let Some(ref cfg) = param_autoconfig {
                    info!(context, "Got autoconfig: {}", &cfg);
@@ -269,15 +256,15 @@ pub fn JobConfigureImap(context: &Context) -> job::Status {
                    param.send_port = cfg.send_port;
                    param.send_user = cfg.send_user.clone();
                    param.server_flags = cfg.server_flags;
-                    /* although param_autoconfig's data are no longer needed from,
-                    it is used to later to prevent trying variations of port/server/logins */
+                    /* although param_autoconfig's data are no longer needed from, it is important to keep the object as
+                    we may enter "deep guessing" if we could not read a configuration */
                }
                param.server_flags |= keep_flags;
                true
            }
            // Step 3: Fill missing fields with defaults
-            // If you change the match-number here, also update STEP_13_AFTER_AUTOCONFIG above
-            STEP_13_AFTER_AUTOCONFIG => {
+            13 => {
+                // if you move this, don't forget to update STEP_3_INDEX, too
                if param.mail_server.is_empty() {
                    param.mail_server = format!("imap.{}", param_domain,)
                }
@@ -441,43 +428,6 @@ pub fn JobConfigureImap(context: &Context) -> job::Status {

    context.free_ongoing();
    progress!(context, if success { 1000 } else { 0 });
-    job::Status::Finished(Ok(()))
-}
-
-fn get_offline_autoconfig(context: &Context, param: &LoginParam) -> Option<LoginParam> {
-    // XXX we don't have https://github.com/deltachat/provider-db  APIs
-    // integrated yet but we'll already add nauta as a first use case, also
-    // showing what we need from provider-db in the future.
-    info!(
-        context,
-        "checking internal provider-info for offline autoconfig"
-    );
-
-    if param.addr.ends_with("@nauta.cu") {
-        let mut p = LoginParam::new();
-
-        p.addr = param.addr.clone();
-        p.mail_server = "imap.nauta.cu".to_string();
-        p.mail_user = param.addr.clone();
-        p.mail_pw = param.mail_pw.clone();
-        p.mail_port = 143;
-        p.imap_certificate_checks = CertificateChecks::AcceptInvalidCertificates;
-
-        p.send_server = "smtp.nauta.cu".to_string();
-        p.send_user = param.addr.clone();
-        p.send_pw = param.mail_pw.clone();
-        p.send_port = 25;
-        p.smtp_certificate_checks = CertificateChecks::AcceptInvalidCertificates;
-        p.server_flags = DC_LP_AUTH_NORMAL as i32
-            | DC_LP_IMAP_SOCKET_STARTTLS as i32
-            | DC_LP_SMTP_SOCKET_STARTTLS as i32;
-
-        info!(context, "found offline autoconfig: {}", p);
-        Some(p)
-    } else {
-        info!(context, "no offline autoconfig found");
-        None
-    }
 }

 fn try_imap_connections(
@@ -535,22 +485,17 @@ fn try_imap_connection(

 fn try_imap_one_param(context: &Context, param: &LoginParam) -> Option<bool> {
    let inf = format!(
-        "imap: {}@{}:{} flags=0x{:x} certificate_checks={}",
-        param.mail_user,
-        param.mail_server,
-        param.mail_port,
-        param.server_flags,
-        param.imap_certificate_checks
+        "imap: {}@{}:{} flags=0x{:x}",
+        param.mail_user, param.mail_server, param.mail_port, param.server_flags
    );
    info!(context, "Trying: {}", inf);
-    if task::block_on(
-        context
-            .inbox_thread
-            .read()
-            .unwrap()
-            .imap
-            .connect(context, &param),
-    ) {
+    if context
+        .inbox_thread
+        .read()
+        .unwrap()
+        .imap
+        .connect(context, &param)
+    {
        info!(context, "success: {}", inf);
        return Some(true);
    }
@@ -622,7 +567,6 @@ fn try_smtp_one_param(context: &Context, param: &LoginParam) -> Option<bool> {
 #[cfg(test)]
 mod tests {

-    use super::*;
    use crate::config::*;
    use crate::configure::JobConfigureImap;
    use crate::test_utils::*;
@@ -636,19 +580,4 @@ mod tests {
        t.ctx.set_config(Config::MailPw, Some("123456")).unwrap();
        JobConfigureImap(&t.ctx);
    }
-
-    #[test]
-    fn test_get_offline_autoconfig() {
-        let context = dummy_context().ctx;
-
-        let mut params = LoginParam::new();
-        params.addr = "someone123@example.org".to_string();
-        assert!(get_offline_autoconfig(&context, &params).is_none());
-
-        let mut params = LoginParam::new();
-        params.addr = "someone123@nauta.cu".to_string();
-        let found_params = get_offline_autoconfig(&context, &params).unwrap();
-        assert_eq!(found_params.mail_server, "imap.nauta.cu".to_string());
-        assert_eq!(found_params.send_server, "smtp.nauta.cu".to_string());
-    }
 }
--- a/src/configure/read_url.rs
+++ b/src/configure/read_url.rs
@@ -1,4 +1,5 @@
 use crate::context::Context;
+use failure::Fail;

 #[derive(Debug, Fail)]
 pub enum Error {
@@ -11,10 +12,10 @@ pub type Result<T> = std::result::Result<T, Error>;
 pub fn read_url(context: &Context, url: &str) -> Result<String> {
    info!(context, "Requesting URL {}", url);

-    match reqwest::blocking::Client::new()
+    match reqwest::Client::new()
        .get(url)
        .send()
-        .and_then(|res| res.text())
+        .and_then(|mut res| res.text())
    {
        Ok(res) => Ok(res),
        Err(err) => {
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -1,5 +1,5 @@
 //! # Constants
-#![allow(dead_code)]
+#![allow(non_camel_case_types, dead_code)]

 use deltachat_derive::*;
 use lazy_static::lazy_static;
@@ -58,8 +58,9 @@ pub const DC_GCM_ADDDAYMARKER: u32 = 0x01;
 pub const DC_GCL_VERIFIED_ONLY: usize = 0x01;
 pub const DC_GCL_ADD_SELF: usize = 0x02;

-// unchanged user avatars are resent to the recipients every some days
-pub const DC_RESEND_USER_AVATAR_DAYS: i64 = 14;
+// values for DC_PARAM_FORCE_PLAINTEXT
+pub(crate) const DC_FP_NO_AUTOCRYPT_HEADER: i32 = 2;
+pub(crate) const DC_FP_ADD_AUTOCRYPT_HEADER: i32 = 1;

 /// virtual chat showing all messages belonging to chats flagged with chats.blocked=2
 pub(crate) const DC_CHAT_ID_DEADDROP: u32 = 1;
@@ -110,7 +111,7 @@ pub const DC_MSG_ID_LAST_SPECIAL: u32 = 9;
 /// approx. max. length returned by dc_msg_get_text()
 const DC_MAX_GET_TEXT_LEN: usize = 30000;
 /// approx. max. length returned by dc_get_msg_info()
-const DC_MAX_GET_INFO_LEN: usize = 100_000;
+const DC_MAX_GET_INFO_LEN: usize = 100000;

 pub const DC_CONTACT_ID_UNDEFINED: u32 = 0;
 pub const DC_CONTACT_ID_SELF: u32 = 1;
@@ -118,10 +119,6 @@ pub const DC_CONTACT_ID_INFO: u32 = 2;
 pub const DC_CONTACT_ID_DEVICE: u32 = 5;
 pub const DC_CONTACT_ID_LAST_SPECIAL: u32 = 9;

-// decorative address that is used for DC_CONTACT_ID_DEVICE
-// when an api that returns an email is called.
-pub const DC_CONTACT_ID_DEVICE_ADDR: &str = "device@localhost";
-
 // Flags for empty server job

 pub const DC_EMPTY_MVBOX: u32 = 0x01;
@@ -180,14 +177,10 @@ pub const DC_VC_CONTACT_CONFIRM: i32 = 6;
 pub const DC_BOB_ERROR: i32 = 0;
 pub const DC_BOB_SUCCESS: i32 = 1;

-// max. width/height of an avatar
-pub const AVATAR_SIZE: u32 = 192;
-
 #[derive(Debug, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive, FromSql, ToSql)]
 #[repr(i32)]
 pub enum Viewtype {
    Unknown = 0,
-
    /// Text message.
    /// The text of the message is set using dc_msg_set_text()
    /// and retrieved with dc_msg_get_text().
--- a/src/contact.rs
+++ b/src/contact.rs
@@ -1,5 +1,3 @@
-//! Contacts module
-
 use std::path::PathBuf;

 use deltachat_derive::*;
@@ -12,13 +10,11 @@ use crate::constants::*;
 use crate::context::Context;
 use crate::dc_tools::*;
 use crate::e2ee;
-use crate::error::{Error, Result};
+use crate::error::Result;
 use crate::events::Event;
 use crate::key::*;
 use crate::login_param::LoginParam;
 use crate::message::{MessageState, MsgId};
-use crate::mimeparser::AvatarAction;
-use crate::param::*;
 use crate::peerstate::*;
 use crate::sql;
 use crate::stock::StockMessage;
@@ -27,17 +23,15 @@ use crate::stock::StockMessage;
 const DC_ORIGIN_MIN_CONTACT_LIST: i32 = 0x100;

 /// An object representing a single contact in memory.
-///
 /// The contact object is not updated.
 /// If you want an update, you have to recreate the object.
 ///
 /// The library makes sure
 /// only to use names _authorized_ by the contact in `To:` or `Cc:`.
-/// *Given-names* as "Daddy" or "Honey" are not used there.
+/// _Given-names _as "Daddy" or "Honey" are not used there.
 /// For this purpose, internally, two names are tracked -
-/// authorized name and given name.
+/// authorized-name and given-name.
 /// By default, these names are equal, but functions working with contact names
-/// only affect the given name.
 #[derive(Debug)]
 pub struct Contact {
    /// The contact ID.
@@ -48,28 +42,20 @@ pub struct Contact {
    ///
    /// Normal contact IDs are larger than these special ones (larger than DC_CONTACT_ID_LAST_SPECIAL).
    pub id: u32,
-
    /// Contact name. It is recommended to use `Contact::get_name`,
    /// `Contact::get_display_name` or `Contact::get_name_n_addr` to access this field.
    /// May be empty, initially set to `authname`.
    name: String,
-
    /// Name authorized by the contact himself. Only this name may be spread to others,
    /// e.g. in To:-lists. May be empty. It is recommended to use `Contact::get_authname`,
    /// to access this field.
    authname: String,
-
    /// E-Mail-Address of the contact. It is recommended to use `Contact::get_addr`` to access this field.
    addr: String,
-
    /// Blocked state. Use dc_contact_is_blocked to access this field.
-    pub blocked: bool,
-
+    blocked: bool,
    /// The origin/source of the contact.
    pub origin: Origin,
-
-    /// Parameters as Param::ProfileImage
-    pub param: Params,
 }

 /// Possible origins of a contact.
@@ -79,54 +65,38 @@ pub struct Contact {
 #[repr(i32)]
 pub enum Origin {
    Unknown = 0,
-
    /// From: of incoming messages of unknown sender
    IncomingUnknownFrom = 0x10,
-
    /// Cc: of incoming messages of unknown sender
    IncomingUnknownCc = 0x20,
-
    /// To: of incoming messages of unknown sender
    IncomingUnknownTo = 0x40,
-
    /// address scanned but not verified
    UnhandledQrScan = 0x80,
-
    /// Reply-To: of incoming message of known sender
    IncomingReplyTo = 0x100,
-
    /// Cc: of incoming message of known sender
    IncomingCc = 0x200,
-
    /// additional To:'s of incoming message of known sender
    IncomingTo = 0x400,
-
    /// a chat was manually created for this user, but no message yet sent
    CreateChat = 0x800,
-
    /// message sent by us
    OutgoingBcc = 0x1000,
-
    /// message sent by us
    OutgoingCc = 0x2000,
-
    /// message sent by us
    OutgoingTo = 0x4000,
-
    /// internal use
    Internal = 0x40000,
-
    /// address is in our address book
    AdressBook = 0x80000,
-
    /// set on Alice's side for contacts like Bob that have scanned the QR code offered by her. Only means the contact has once been established using the "securejoin" procedure in the past, getting the current key verification status requires calling dc_contact_is_verified() !
-    SecurejoinInvited = 0x0100_0000,
-
+    SecurejoinInvited = 0x1000000,
    /// set on Bob's side for contacts scanned and verified from a QR code. Only means the contact has once been established using the "securejoin" procedure in the past, getting the current key verification status requires calling dc_contact_is_verified() !
-    SecurejoinJoined = 0x0200_0000,
-
-    /// contact added mannually by dc_create_contact(), this should be the largest origin as otherwise the user cannot modify the names
-    ManuallyCreated = 0x0400_0000,
+    SecurejoinJoined = 0x2000000,
+    /// contact added mannually by dc_create_contact(), this should be the largets origin as otherwise the user cannot modify the names
+    ManuallyCreated = 0x4000000,
 }

 impl Default for Origin {
@@ -136,11 +106,19 @@ impl Default for Origin {
 }

 impl Origin {
-    /// Contacts that are known, i. e. they came in via accepted contacts or
-    /// themselves an accepted contact. Known contacts are shown in the
-    /// contact list when one creates a chat and wants to add members etc.
-    pub fn is_known(self) -> bool {
-        self >= Origin::IncomingReplyTo
+    /// Contacts that start a new "normal" chat, defaults to off.
+    pub fn is_start_new_chat(self) -> bool {
+        self as i32 >= 0x7FFFFFFF
+    }
+
+    /// Contacts that are verified and known not to be spam.
+    pub fn is_verified(self) -> bool {
+        self as i32 >= 0x100
+    }
+
+    /// Contacts that are shown in the contact list.
+    pub fn include_in_contactlist(self) -> bool {
+        self as i32 >= DC_ORIGIN_MIN_CONTACT_LIST
    }
 }

@@ -164,10 +142,32 @@ pub enum VerifiedStatus {

 impl Contact {
    pub fn load_from_db(context: &Context, contact_id: u32) -> crate::sql::Result<Self> {
-        let mut res = context.sql.query_row(
-            "SELECT c.name, c.addr, c.origin, c.blocked, c.authname, c.param
-               FROM contacts c
-              WHERE c.id=?;",
+        if contact_id == DC_CONTACT_ID_SELF {
+            let contact = Contact {
+                id: contact_id,
+                name: context.stock_str(StockMessage::SelfMsg).into(),
+                authname: "".into(),
+                addr: context
+                    .get_config(Config::ConfiguredAddr)
+                    .unwrap_or_default(),
+                blocked: false,
+                origin: Origin::Unknown,
+            };
+            return Ok(contact);
+        } else if contact_id == DC_CONTACT_ID_DEVICE {
+            let contact = Contact {
+                id: contact_id,
+                name: context.stock_str(StockMessage::DeviceMessages).into(),
+                authname: "".into(),
+                addr: "device@localhost".into(),
+                blocked: false,
+                origin: Origin::Unknown,
+            };
+            return Ok(contact);
+        }
+
+        context.sql.query_row(
+            "SELECT c.name, c.addr, c.origin, c.blocked, c.authname  FROM contacts c  WHERE c.id=?;",
            params![contact_id as i32],
            |row| {
                let contact = Self {
@@ -177,21 +177,10 @@ impl Contact {
                    addr: row.get::<_, String>(1)?,
                    blocked: row.get::<_, Option<i32>>(3)?.unwrap_or_default() != 0,
                    origin: row.get(2)?,
-                    param: row.get::<_, String>(5)?.parse().unwrap_or_default(),
                };
                Ok(contact)
-            },
-        )?;
-        if contact_id == DC_CONTACT_ID_SELF {
-            res.name = context.stock_str(StockMessage::SelfMsg).to_string();
-            res.addr = context
-                .get_config(Config::ConfiguredAddr)
-                .unwrap_or_default();
-        } else if contact_id == DC_CONTACT_ID_DEVICE {
-            res.name = context.stock_str(StockMessage::DeviceMessages).to_string();
-            res.addr = DC_CONTACT_ID_DEVICE_ADDR.to_string();
-        }
-        Ok(res)
+            }
+        )
    }

    /// Returns `true` if this contact is blocked.
@@ -219,7 +208,7 @@ impl Contact {
    /// Add a single contact as a result of an _explicit_ user action.
    ///
    /// We assume, the contact name, if any, is entered by the user and is used "as is" therefore,
-    /// normalize() is *not* called for the name. If the contact is blocked, it is unblocked.
+    /// normalize() is _not_ called for the name. If the contact is blocked, it is unblocked.
    ///
    /// To add a number of contacts, see `dc_add_address_book()` which is much faster for adding
    /// a bunch of addresses.
@@ -249,7 +238,7 @@ impl Contact {
    }

    /// Mark all messages sent by the given contact
-    /// as *noticed*.  See also dc_marknoticed_chat() and dc_markseen_msgs()
+    /// as _noticed_.  See also dc_marknoticed_chat() and dc_markseen_msgs()
    ///
    /// Calling this function usually results in the event `#DC_EVENT_MSGS_CHANGED`.
    pub fn mark_noticed(context: &Context, id: u32) {
@@ -410,30 +399,18 @@ impl Contact {
                }
                sth_modified = Modifier::Modified;
            }
+        } else if sql::execute(
+            context,
+            &context.sql,
+            "INSERT INTO contacts (name, addr, origin) VALUES(?, ?, ?);",
+            params![name.as_ref(), addr, origin,],
+        )
+        .is_ok()
+        {
+            row_id = sql::get_rowid(context, &context.sql, "contacts", "addr", addr);
+            sth_modified = Modifier::Created;
        } else {
-            if origin == Origin::IncomingUnknownFrom {
-                update_authname = true;
-            }
-
-            if sql::execute(
-                context,
-                &context.sql,
-                "INSERT INTO contacts (name, addr, origin, authname) VALUES(?, ?, ?, ?);",
-                params![
-                    name.as_ref(),
-                    addr,
-                    origin,
-                    if update_authname { name.as_ref() } else { "" }
-                ],
-            )
-            .is_ok()
-            {
-                row_id = sql::get_rowid(context, &context.sql, "contacts", "addr", addr);
-                sth_modified = Modifier::Created;
-                info!(context, "added contact id={} addr={}", row_id, addr);
-            } else {
-                error!(context, "Cannot add contact.");
-            }
+            error!(context, "Cannot add contact.");
        }

        Ok((row_id, sth_modified))
@@ -451,7 +428,7 @@ impl Contact {
    /// the event `DC_EVENT_CONTACTS_CHANGED` is sent.
    ///
    /// To add a single contact entered by the user, you should prefer `Contact::create`,
-    /// however, for adding a bunch of addresses, this function is much faster.
+    /// however, for adding a bunch of addresses, this function is _much_ faster.
    ///
    /// The `addr_book` is a multiline string in the format `Name one\nAddress one\nName two\nAddress two`.
    ///
@@ -517,7 +494,7 @@ impl Contact {
                params![
                    self_addr,
                    DC_CONTACT_ID_LAST_SPECIAL as i32,
-                    Origin::IncomingReplyTo,
+                    0x100,
                    &s3str_like_cmd,
                    &s3str_like_cmd,
                    if flag_verified_only { 0 } else { 1 },
@@ -735,16 +712,6 @@ impl Contact {
        Ok(Contact::load_from_db(context, contact_id)?)
    }

-    pub fn update_param(&mut self, context: &Context) -> Result<()> {
-        sql::execute(
-            context,
-            &context.sql,
-            "UPDATE contacts SET param=? WHERE id=?",
-            params![self.param.to_string(), self.id as i32],
-        )?;
-        Ok(())
-    }
-
    /// Get the ID of the contact.
    pub fn get_id(&self) -> u32 {
        self.id
@@ -778,9 +745,6 @@ impl Contact {
        if !self.name.is_empty() {
            return &self.name;
        }
-        if !self.authname.is_empty() {
-            return &self.authname;
-        }
        &self.addr
    }

@@ -816,11 +780,8 @@ impl Contact {
            if let Some(p) = context.get_config(Config::Selfavatar) {
                return Some(PathBuf::from(p));
            }
-        } else if let Some(image_rel) = self.param.get(Param::ProfileImage) {
-            if !image_rel.is_empty() {
-                return Some(dc_get_abs_path(context, image_rel));
-            }
        }
+        // TODO: else get image_abs from contact param
        None
    }

@@ -903,6 +864,22 @@ impl Contact {
            .unwrap_or_default() as usize
    }

+    pub fn get_origin_by_id(context: &Context, contact_id: u32, ret_blocked: &mut i32) -> Origin {
+        let mut ret = Origin::Unknown;
+        *ret_blocked = 0;
+
+        if let Ok(contact) = Contact::load_from_db(context, contact_id) {
+            /* we could optimize this by loading only the needed fields */
+            if contact.blocked {
+                *ret_blocked = 1;
+            } else {
+                ret = contact.origin;
+            }
+        }
+
+        ret
+    }
+
    pub fn real_exists_by_id(context: &Context, contact_id: u32) -> bool {
        if !context.sql.is_open() || contact_id <= DC_CONTACT_ID_LAST_SPECIAL {
            return false;
@@ -929,7 +906,7 @@ impl Contact {
 }

 /// Extracts first name from full name.
-fn get_first_name(full_name: &str) -> &str {
+fn get_first_name<'a>(full_name: &'a str) -> &'a str {
    full_name.splitn(2, ' ').next().unwrap_or_default()
 }

@@ -956,21 +933,21 @@ fn set_block_contact(context: &Context, contact_id: u32, new_blocking: bool) {
    }

    if let Ok(contact) = Contact::load_from_db(context, contact_id) {
-        if contact.blocked != new_blocking
-            && sql::execute(
+        if contact.blocked != new_blocking {
+            if sql::execute(
                context,
                &context.sql,
                "UPDATE contacts SET blocked=? WHERE id=?;",
                params![new_blocking as i32, contact_id as i32],
            )
            .is_ok()
-        {
-            // also (un)block all chats with _only_ this contact - we do not delete them to allow a
-            // non-destructive blocking->unblocking.
-            // (Maybe, beside normal chats (type=100) we should also block group chats with only this user.
-            // However, I'm not sure about this point; it may be confusing if the user wants to add other people;
-            // this would result in recreating the same group...)
-            if sql::execute(
+            {
+                // also (un)block all chats with _only_ this contact - we do not delete them to allow a
+                // non-destructive blocking->unblocking.
+                // (Maybe, beside normal chats (type=100) we should also block group chats with only this user.
+                // However, I'm not sure about this point; it may be confusing if the user wants to add other people;
+                // this would result in recreating the same group...)
+                if sql::execute(
                    context,
                    &context.sql,
                    "UPDATE chats SET blocked=? WHERE type=? AND id IN (SELECT chat_id FROM chats_contacts WHERE contact_id=?);",
@@ -979,36 +956,11 @@ fn set_block_contact(context: &Context, contact_id: u32, new_blocking: bool) {
                    Contact::mark_noticed(context, contact_id);
                    context.call_cb(Event::ContactsChanged(None));
                }
+            }
        }
    }
 }

-pub fn set_profile_image(
-    context: &Context,
-    contact_id: u32,
-    profile_image: &AvatarAction,
-) -> Result<()> {
-    // the given profile image is expected to be already in the blob directory
-    // as profile images can be set only by receiving messages, this should be always the case, however.
-    let mut contact = Contact::load_from_db(context, contact_id)?;
-    let changed = match profile_image {
-        AvatarAction::Change(profile_image) => {
-            contact.param.set(Param::ProfileImage, profile_image);
-            true
-        }
-        AvatarAction::Delete => {
-            contact.param.remove(Param::ProfileImage);
-            true
-        }
-        AvatarAction::None => false,
-    };
-    if changed {
-        contact.update_param(context)?;
-        context.call_cb(Event::ContactsChanged(Some(contact_id)));
-    }
-    Ok(())
-}
-
 /// Normalize a name.
 ///
 /// - Remove quotes (come from some bad MUA implementations)
@@ -1073,18 +1025,6 @@ fn cat_fingerprint(
    }
 }

-impl Context {
-    /// determine whether the specified addr maps to the/a self addr
-    pub fn is_self_addr(&self, addr: &str) -> Result<bool> {
-        let self_addr = match self.get_config(Config::ConfiguredAddr) {
-            Some(s) => s,
-            None => return Err(Error::NotConfigured),
-        };
-
-        Ok(addr_cmp(self_addr, addr))
-    }
-}
-
 pub fn addr_cmp(addr1: impl AsRef<str>, addr2: impl AsRef<str>) -> bool {
    let norm1 = addr_normalize(addr1.as_ref()).to_lowercase();
    let norm2 = addr_normalize(addr2.as_ref()).to_lowercase();
@@ -1092,6 +1032,15 @@ pub fn addr_cmp(addr1: impl AsRef<str>, addr2: impl AsRef<str>) -> bool {
    norm1 == norm2
 }

+pub fn addr_equals_self(context: &Context, addr: impl AsRef<str>) -> bool {
+    if !addr.as_ref().is_empty() {
+        if let Some(self_addr) = context.get_config(Config::ConfiguredAddr) {
+            return addr_cmp(addr, self_addr);
+        }
+    }
+    false
+}
+
 fn split_address_book(book: &str) -> Vec<(&str, &str)> {
    book.lines()
        .chunks(2)
@@ -1175,18 +1124,6 @@ mod tests {
        assert_eq!(contacts.len(), 0);
    }

-    #[test]
-    fn test_is_self_addr() -> Result<()> {
-        let t = test_context(None);
-        assert!(t.ctx.is_self_addr("me@me.org").is_err());
-
-        let addr = configure_alice_keypair(&t.ctx);
-        assert_eq!(t.ctx.is_self_addr("me@me.org")?, false);
-        assert_eq!(t.ctx.is_self_addr(&addr)?, true);
-
-        Ok(())
-    }
-
    #[test]
    fn test_add_or_lookup() {
        // add some contacts, this also tests add_address_book()
@@ -1276,63 +1213,6 @@ mod tests {
        assert!(!contact.is_blocked());
    }

-    #[test]
-    fn test_remote_authnames() {
-        let t = dummy_context();
-
-        let (contact_id, sth_modified) = Contact::add_or_lookup(
-            &t.ctx,
-            "bob1",
-            "bob@example.org",
-            Origin::IncomingUnknownFrom,
-        )
-        .unwrap();
-        assert!(contact_id > DC_CONTACT_ID_LAST_SPECIAL);
-        assert_eq!(sth_modified, Modifier::Created);
-        let contact = Contact::load_from_db(&t.ctx, contact_id).unwrap();
-        assert_eq!(contact.get_authname(), "bob1");
-        assert_eq!(contact.get_name(), "bob1");
-        assert_eq!(contact.get_display_name(), "bob1");
-
-        let (contact_id, sth_modified) = Contact::add_or_lookup(
-            &t.ctx,
-            "bob2",
-            "bob@example.org",
-            Origin::IncomingUnknownFrom,
-        )
-        .unwrap();
-        assert!(contact_id > DC_CONTACT_ID_LAST_SPECIAL);
-        assert_eq!(sth_modified, Modifier::Modified);
-        let contact = Contact::load_from_db(&t.ctx, contact_id).unwrap();
-        assert_eq!(contact.get_authname(), "bob2");
-        assert_eq!(contact.get_name(), "bob2");
-        assert_eq!(contact.get_display_name(), "bob2");
-
-        let (contact_id, sth_modified) =
-            Contact::add_or_lookup(&t.ctx, "bob3", "bob@example.org", Origin::ManuallyCreated)
-                .unwrap();
-        assert!(contact_id > DC_CONTACT_ID_LAST_SPECIAL);
-        assert_eq!(sth_modified, Modifier::Modified);
-        let contact = Contact::load_from_db(&t.ctx, contact_id).unwrap();
-        assert_eq!(contact.get_authname(), "bob2");
-        assert_eq!(contact.get_name(), "bob3");
-        assert_eq!(contact.get_display_name(), "bob3");
-
-        let (contact_id, sth_modified) = Contact::add_or_lookup(
-            &t.ctx,
-            "bob4",
-            "bob@example.org",
-            Origin::IncomingUnknownFrom,
-        )
-        .unwrap();
-        assert!(contact_id > DC_CONTACT_ID_LAST_SPECIAL);
-        assert_eq!(sth_modified, Modifier::Modified);
-        let contact = Contact::load_from_db(&t.ctx, contact_id).unwrap();
-        assert_eq!(contact.get_authname(), "bob4");
-        assert_eq!(contact.get_name(), "bob3");
-        assert_eq!(contact.get_display_name(), "bob3");
-    }
-
    #[test]
    fn test_addr_cmp() {
        assert!(addr_cmp("AA@AA.ORG", "aa@aa.ORG"));
--- a/src/context.rs
+++ b/src/context.rs
@@ -1,10 +1,10 @@
-//! Context module
-
 use std::collections::HashMap;
 use std::ffi::OsString;
 use std::path::{Path, PathBuf};
 use std::sync::{Arc, Condvar, Mutex, RwLock};

+use libc::uintptr_t;
+
 use crate::chat::*;
 use crate::config::Config;
 use crate::constants::*;
@@ -17,7 +17,7 @@ use crate::job_thread::JobThread;
 use crate::key::*;
 use crate::login_param::LoginParam;
 use crate::lot::Lot;
-use crate::message::{self, Message, MessengerMessage, MsgId};
+use crate::message::{self, Message, MsgId};
 use crate::param::Params;
 use crate::smtp::Smtp;
 use crate::sql::Sql;
@@ -30,7 +30,12 @@ use crate::sql::Sql;
 /// * `event` - One of the [Event] items.
 /// * `data1` - Depends on the event parameter, see [Event].
 /// * `data2` - Depends on the event parameter, see [Event].
-pub type ContextCallback = dyn Fn(&Context, Event) -> () + Send + Sync;
+///
+/// # Returns
+///
+/// This callback must return 0 unless stated otherwise in the event
+/// description at [Event].
+pub type ContextCallback = dyn Fn(&Context, Event) -> uintptr_t + Send + Sync;

 #[derive(DebugStub)]
 pub struct Context {
@@ -79,7 +84,12 @@ pub fn get_info() -> HashMap<&'static str, String> {
        "sqlite_thread_safe",
        unsafe { rusqlite::ffi::sqlite3_threadsafe() }.to_string(),
    );
-    res.insert("arch", (std::mem::size_of::<usize>() * 8).to_string());
+    res.insert(
+        "arch",
+        (std::mem::size_of::<*mut libc::c_void>())
+            .wrapping_mul(8)
+            .to_string(),
+    );
    res.insert("level", "awesome".into());
    res
 }
@@ -160,8 +170,8 @@ impl Context {
        self.blobdir.as_path()
    }

-    pub fn call_cb(&self, event: Event) {
-        (*self.cb)(self, event);
+    pub fn call_cb(&self, event: Event) -> uintptr_t {
+        (*self.cb)(self, event)
    }

    /*******************************************************************************
@@ -286,11 +296,6 @@ impl Context {
        res.insert("database_version", dbversion.to_string());
        res.insert("blobdir", self.get_blobdir().display().to_string());
        res.insert("display_name", displayname.unwrap_or_else(|| unset.into()));
-        res.insert(
-            "selfavatar",
-            self.get_config(Config::Selfavatar)
-                .unwrap_or_else(|| "<unset>".to_string()),
-        );
        res.insert("is_configured", is_configured.to_string());
        res.insert("entered_account_settings", l.to_string());
        res.insert("used_account_settings", l2.to_string());
@@ -440,17 +445,15 @@ impl Context {
                return;
            }

-            match msg.is_dc_message {
-                MessengerMessage::No => {}
-                MessengerMessage::Yes | MessengerMessage::Reply => {
-                    job_add(
-                        self,
-                        Action::MoveMsg,
-                        msg.id.to_u32() as i32,
-                        Params::new(),
-                        0,
-                    );
-                }
+            // 1 = dc message, 2 = reply to dc message
+            if 0 != msg.is_dc_message {
+                job_add(
+                    self,
+                    Action::MoveMsg,
+                    msg.id.to_u32() as i32,
+                    Params::new(),
+                    0,
+                );
            }
        }
    }
@@ -523,7 +526,7 @@ mod tests {
        let tmp = tempfile::tempdir().unwrap();
        let dbfile = tmp.path().join("db.sqlite");
        std::fs::write(&dbfile, b"123").unwrap();
-        let res = Context::new(Box::new(|_, _| ()), "FakeOs".into(), dbfile);
+        let res = Context::new(Box::new(|_, _| 0), "FakeOs".into(), dbfile);
        assert!(res.is_err());
    }

@@ -538,7 +541,7 @@ mod tests {
    fn test_blobdir_exists() {
        let tmp = tempfile::tempdir().unwrap();
        let dbfile = tmp.path().join("db.sqlite");
-        Context::new(Box::new(|_, _| ()), "FakeOS".into(), dbfile).unwrap();
+        Context::new(Box::new(|_, _| 0), "FakeOS".into(), dbfile).unwrap();
        let blobdir = tmp.path().join("db.sqlite-blobs");
        assert!(blobdir.is_dir());
    }
@@ -549,7 +552,7 @@ mod tests {
        let dbfile = tmp.path().join("db.sqlite");
        let blobdir = tmp.path().join("db.sqlite-blobs");
        std::fs::write(&blobdir, b"123").unwrap();
-        let res = Context::new(Box::new(|_, _| ()), "FakeOS".into(), dbfile);
+        let res = Context::new(Box::new(|_, _| 0), "FakeOS".into(), dbfile);
        assert!(res.is_err());
    }

@@ -559,7 +562,7 @@ mod tests {
        let subdir = tmp.path().join("subdir");
        let dbfile = subdir.join("db.sqlite");
        let dbfile2 = dbfile.clone();
-        Context::new(Box::new(|_, _| ()), "FakeOS".into(), dbfile).unwrap();
+        Context::new(Box::new(|_, _| 0), "FakeOS".into(), dbfile).unwrap();
        assert!(subdir.is_dir());
        assert!(dbfile2.is_file());
    }
@@ -569,7 +572,7 @@ mod tests {
        let tmp = tempfile::tempdir().unwrap();
        let dbfile = tmp.path().join("db.sqlite");
        let blobdir = PathBuf::new();
-        let res = Context::with_blobdir(Box::new(|_, _| ()), "FakeOS".into(), dbfile, blobdir);
+        let res = Context::with_blobdir(Box::new(|_, _| 0), "FakeOS".into(), dbfile, blobdir);
        assert!(res.is_err());
    }

@@ -578,7 +581,7 @@ mod tests {
        let tmp = tempfile::tempdir().unwrap();
        let dbfile = tmp.path().join("db.sqlite");
        let blobdir = tmp.path().join("blobs");
-        let res = Context::with_blobdir(Box::new(|_, _| ()), "FakeOS".into(), dbfile, blobdir);
+        let res = Context::with_blobdir(Box::new(|_, _| 0), "FakeOS".into(), dbfile, blobdir);
        assert!(res.is_err());
    }

--- a/deltachat-ffi/src/dc_array.rs
+++ b/deltachat-ffi/src/dc_array.rs
@@ -2,6 +2,7 @@ use crate::location::Location;

 /* * the structure behind dc_array_t */
 #[derive(Debug, Clone)]
+#[allow(non_camel_case_types)]
 pub enum dc_array_t {
    Locations(Vec<Location>),
    Uint(Vec<u32>),
--- a/src/dc_receive_imf.rs
+++ b/src/dc_receive_imf.rs
--- a/src/dc_simplify.rs
+++ b/src/dc_simplify.rs
@@ -0,0 +1,273 @@
+use crate::dehtml::*;
+
+#[derive(Copy, Clone)]
+pub struct Simplify {
+    pub is_forwarded: bool,
+}
+
+/// Return index of footer line in vector of message lines, or vector length if
+/// no footer is found.
+///
+/// Also return whether not-standard (rfc3676, §4.3) footer is found.
+fn find_message_footer(lines: &[&str]) -> (usize, bool) {
+    for (ix, &line) in lines.iter().enumerate() {
+        // quoted-printable may encode `-- ` to `-- =20` which is converted
+        // back to `--  `
+        match line {
+            "-- " | "--  " => return (ix, false),
+            "--" | "---" | "----" => return (ix, true),
+            _ => (),
+        }
+    }
+    (lines.len(), false)
+}
+
+impl Simplify {
+    pub fn new() -> Self {
+        Simplify {
+            is_forwarded: false,
+        }
+    }
+
+    /// Simplify and normalise text: Remove quotes, signatures, unnecessary
+    /// lineends etc.
+    /// The data returned from simplify() must be free()'d when no longer used.
+    pub fn simplify(&mut self, input: &str, is_html: bool, is_msgrmsg: bool) -> String {
+        let mut out = if is_html {
+            dehtml(input)
+        } else {
+            input.to_string()
+        };
+
+        out.retain(|c| c != '\r');
+        out = self.simplify_plain_text(&out, is_msgrmsg);
+        out.retain(|c| c != '\r');
+
+        out
+    }
+
+    /**
+     * Simplify Plain Text
+     */
+    #[allow(non_snake_case)]
+    fn simplify_plain_text(&mut self, buf_terminated: &str, is_msgrmsg: bool) -> String {
+        /* This function ...
+        ... removes all text after the line `-- ` (footer mark)
+        ... removes full quotes at the beginning and at the end of the text -
+            these are all lines starting with the character `>`
+        ... remove a non-empty line before the removed quote (contains sth. like "On 2.9.2016, Bjoern wrote:" in different formats and lanugages) */
+        /* split the given buffer into lines */
+        let lines: Vec<_> = buf_terminated.split('\n').collect();
+        let mut l_first: usize = 0;
+        let mut is_cut_at_begin = false;
+        let (mut l_last, mut is_cut_at_end) = find_message_footer(&lines);
+
+        if l_last > l_first + 2 {
+            let line0 = lines[l_first];
+            let line1 = lines[l_first + 1];
+            let line2 = lines[l_first + 2];
+            if line0 == "---------- Forwarded message ----------"
+                && line1.starts_with("From: ")
+                && line2.is_empty()
+            {
+                self.is_forwarded = true;
+                l_first += 3
+            }
+        }
+        for l in l_first..l_last {
+            let line = lines[l];
+            if line == "-----"
+                || line == "_____"
+                || line == "====="
+                || line == "*****"
+                || line == "~~~~~"
+            {
+                l_last = l;
+                is_cut_at_end = true;
+                /* done */
+                break;
+            }
+        }
+        if !is_msgrmsg {
+            let mut l_lastQuotedLine = None;
+            for l in (l_first..l_last).rev() {
+                let line = lines[l];
+                if is_plain_quote(line) {
+                    l_lastQuotedLine = Some(l)
+                } else if !is_empty_line(line) {
+                    break;
+                }
+            }
+            if let Some(last_quoted_line) = l_lastQuotedLine {
+                l_last = last_quoted_line;
+                is_cut_at_end = true;
+                if l_last > 1 && is_empty_line(lines[l_last - 1]) {
+                    l_last -= 1
+                }
+                if l_last > 1 {
+                    let line = lines[l_last - 1];
+                    if is_quoted_headline(line) {
+                        l_last -= 1
+                    }
+                }
+            }
+        }
+        if !is_msgrmsg {
+            let mut l_lastQuotedLine_0 = None;
+            let mut hasQuotedHeadline = 0;
+            for l in l_first..l_last {
+                let line = lines[l];
+                if is_plain_quote(line) {
+                    l_lastQuotedLine_0 = Some(l)
+                } else if !is_empty_line(line) {
+                    if is_quoted_headline(line)
+                        && 0 == hasQuotedHeadline
+                        && l_lastQuotedLine_0.is_none()
+                    {
+                        hasQuotedHeadline = 1i32
+                    } else {
+                        /* non-quoting line found */
+                        break;
+                    }
+                }
+            }
+            if let Some(last_quoted_line) = l_lastQuotedLine_0 {
+                l_first = last_quoted_line + 1;
+                is_cut_at_begin = true
+            }
+        }
+        /* re-create buffer from the remaining lines */
+        let mut ret = String::new();
+        if is_cut_at_begin {
+            ret += "[...]";
+        }
+        /* we write empty lines only in case and non-empty line follows */
+        let mut pending_linebreaks = 0;
+        let mut content_lines_added = 0;
+        for l in l_first..l_last {
+            let line = lines[l];
+            if is_empty_line(line) {
+                pending_linebreaks += 1
+            } else {
+                if 0 != content_lines_added {
+                    if pending_linebreaks > 2i32 {
+                        pending_linebreaks = 2i32
+                    }
+                    while 0 != pending_linebreaks {
+                        ret += "\n";
+                        pending_linebreaks -= 1
+                    }
+                }
+                // the incoming message might contain invalid UTF8
+                ret += line;
+                content_lines_added += 1;
+                pending_linebreaks = 1i32
+            }
+        }
+        if is_cut_at_end && (!is_cut_at_begin || 0 != content_lines_added) {
+            ret += " [...]";
+        }
+
+        ret
+    }
+}
+
+/**
+ * Tools
+ */
+fn is_empty_line(buf: &str) -> bool {
+    // XXX: can it be simplified to buf.chars().all(|c| c.is_whitespace())?
+    //
+    // Strictly speaking, it is not equivalent (^A is not whitespace, but less than ' '),
+    // but having control sequences in email body?!
+    //
+    // See discussion at: https://github.com/deltachat/deltachat-core-rust/pull/402#discussion_r317062392
+    for c in buf.chars() {
+        if c > ' ' {
+            return false;
+        }
+    }
+
+    true
+}
+
+fn is_quoted_headline(buf: &str) -> bool {
+    /* This function may be called for the line _directly_ before a quote.
+    The function checks if the line contains sth. like "On 01.02.2016, xy@z wrote:" in various languages.
+    - Currently, we simply check if the last character is a ':'.
+    - Checking for the existence of an email address may fail (headlines may show the user's name instead of the address) */
+
+    buf.len() <= 80 && buf.ends_with(':')
+}
+
+fn is_plain_quote(buf: &str) -> bool {
+    buf.starts_with('>')
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use proptest::prelude::*;
+
+    proptest! {
+        #[test]
+        // proptest does not support [[:graphical:][:space:]] regex.
+        fn test_simplify_plain_text_fuzzy(input in "[!-~\t \n]+") {
+            let output = Simplify::new().simplify_plain_text(&input, true);
+            assert!(output.split('\n').all(|s| s != "-- "));
+        }
+    }
+
+    #[test]
+    fn test_simplify_trim() {
+        let mut simplify = Simplify::new();
+        let html = "\r\r\nline1<br>\r\n\r\n\r\rline2\n\r";
+        let plain = simplify.simplify(html, true, false);
+
+        assert_eq!(plain, "line1\nline2");
+    }
+
+    #[test]
+    fn test_simplify_parse_href() {
+        let mut simplify = Simplify::new();
+        let html = "<a href=url>text</a";
+        let plain = simplify.simplify(html, true, false);
+
+        assert_eq!(plain, "[text](url)");
+    }
+
+    #[test]
+    fn test_simplify_bold_text() {
+        let mut simplify = Simplify::new();
+        let html = "<!DOCTYPE name [<!DOCTYPE ...>]><!-- comment -->text <b><?php echo ... ?>bold</b><![CDATA[<>]]>";
+        let plain = simplify.simplify(html, true, false);
+
+        assert_eq!(plain, "text *bold*<>");
+    }
+
+    #[test]
+    fn test_simplify_html_encoded() {
+        let mut simplify = Simplify::new();
+        let html =
+                "&lt;&gt;&quot;&apos;&amp; &auml;&Auml;&ouml;&Ouml;&uuml;&Uuml;&szlig; foo&AElig;&ccedil;&Ccedil; &diams;&lrm;&rlm;&zwnj;&noent;&zwj;";
+
+        let plain = simplify.simplify(html, true, false);
+
+        assert_eq!(
+            plain,
+            "<>\"\'& äÄöÖüÜß fooÆçÇ \u{2666}\u{200e}\u{200f}\u{200c}&noent;\u{200d}"
+        );
+    }
+
+    #[test]
+    fn test_simplify_utilities() {
+        assert!(is_empty_line(" \t"));
+        assert!(is_empty_line(""));
+        assert!(is_empty_line(" \r"));
+        assert!(!is_empty_line(" x"));
+        assert!(is_plain_quote("> hello world"));
+        assert!(is_plain_quote(">>"));
+        assert!(!is_plain_quote("Life is pain"));
+        assert!(!is_plain_quote(""));
+    }
+}
--- a/src/dc_strencode.rs
+++ b/src/dc_strencode.rs
@@ -0,0 +1,74 @@
+use itertools::Itertools;
+
+/// Encode non-ascii-strings as `=?UTF-8?Q?Bj=c3=b6rn_Petersen?=`.
+/// Belongs to RFC 2047: https://tools.ietf.org/html/rfc2047
+///
+/// We do not fold at position 72; this would result in empty words as `=?utf-8?Q??=` which are correct,
+/// but cannot be displayed by some mail programs (eg. Android Stock Mail).
+/// however, this is not needed, as long as _one_ word is not longer than 72 characters.
+/// _if_ it is, the display may get weird.  This affects the subject only.
+/// the best solution wor all this would be if libetpan encodes the line as only libetpan knowns when a header line is full.
+///
+/// @param to_encode Null-terminated UTF-8-string to encode.
+/// @return Returns the encoded string which must be free()'d when no longed needed.
+///     On errors, NULL is returned.
+pub fn dc_encode_header_words(input: impl AsRef<str>) -> String {
+    let mut result = String::default();
+    for (_, group) in &input.as_ref().chars().group_by(|c| c.is_whitespace()) {
+        let word: String = group.collect();
+        result.push_str(&quote_word(&word.as_bytes()));
+    }
+
+    result
+}
+
+fn must_encode(byte: u8) -> bool {
+    static SPECIALS: &[u8] = b",:!\"#$@[\\]^`{|}~=?_";
+
+    SPECIALS.iter().any(|b| *b == byte)
+}
+
+fn quote_word(word: &[u8]) -> String {
+    let mut result = String::default();
+    let mut encoded = false;
+
+    for byte in word {
+        let byte = *byte;
+        if byte >= 128 || must_encode(byte) {
+            result.push_str(&format!("={:2X}", byte));
+            encoded = true;
+        } else if byte == b' ' {
+            result.push('_');
+            encoded = true;
+        } else {
+            result.push(byte as _);
+        }
+    }
+
+    if encoded {
+        result = format!("=?utf-8?Q?{}?=", &result);
+    }
+    result
+}
+
+/* ******************************************************************************
+ * Encode/decode header words, RFC 2047
+ ******************************************************************************/
+
+pub fn dc_needs_ext_header(to_check: impl AsRef<str>) -> bool {
+    let to_check = to_check.as_ref();
+
+    if to_check.is_empty() {
+        return false;
+    }
+
+    to_check.chars().any(|c| {
+        !(c.is_ascii_alphanumeric()
+            || c == '-'
+            || c == '_'
+            || c == '_'
+            || c == '.'
+            || c == '~'
+            || c == '%')
+    })
+}
--- a/src/dc_tools.rs
+++ b/src/dc_tools.rs
@@ -49,8 +49,8 @@ pub(crate) fn dc_truncate(buf: &str, approx_chars: usize, do_unwrap: bool) -> Co
 /// - harmonize together while being different enough
 /// (therefore, we cannot just use random rgb colors :)
 const COLORS: [u32; 16] = [
-    0xe5_65_55, 0xf2_8c_48, 0x8e_85_ee, 0x76_c8_4d, 0x5b_b6_cc, 0x54_9c_dd, 0xd2_5c_99, 0xb3_78_00,
-    0xf2_30_30, 0x39_b2_49, 0xbb_24_3b, 0x96_40_78, 0x66_87_4f, 0x30_8a_b9, 0x12_7e_d0, 0xbe_45_0c,
+    0xe56555, 0xf28c48, 0x8e85ee, 0x76c84d, 0x5bb6cc, 0x549cdd, 0xd25c99, 0xb37800, 0xf23030,
+    0x39b249, 0xbb243b, 0x964078, 0x66874f, 0x308ab9, 0x127ed0, 0xbe450c,
 ];

 pub(crate) fn dc_str_to_color(s: impl AsRef<str>) -> u32 {
@@ -59,7 +59,7 @@ pub(crate) fn dc_str_to_color(s: impl AsRef<str>) -> u32 {
    let bytes = str_lower.as_bytes();
    for (i, byte) in bytes.iter().enumerate() {
        checksum += (i + 1) * *byte as usize;
-        checksum %= 0x00ff_ffff;
+        checksum %= 0xffffff;
    }
    let color_index = checksum % COLORS.len();

@@ -182,6 +182,22 @@ fn encode_66bits_as_base64(v1: u32, v2: u32, fill: u32) -> String {
    String::from_utf8(wrapped_writer).unwrap()
 }

+pub(crate) fn dc_create_incoming_rfc724_mid(
+    message_timestamp: i64,
+    contact_id_from: u32,
+    contact_ids_to: &[u32],
+) -> Option<String> {
+    /* create a deterministic rfc724_mid from input such that
+    repeatedly calling it with the same input results in the same Message-id */
+
+    let largest_id_to = contact_ids_to.iter().max().copied().unwrap_or_default();
+    let result = format!(
+        "{}-{}-{}@stub",
+        message_timestamp, contact_id_from, largest_id_to
+    );
+    Some(result)
+}
+
 /// Function generates a Message-ID that can be used for a new outgoing message.
 /// - this function is called for all outgoing messages.
 /// - the message ID should be globally unique
@@ -201,11 +217,8 @@ pub(crate) fn dc_create_outgoing_rfc724_mid(grpid: Option<&str>, from_addr: &str
 ///
 /// # Arguments
 ///
-/// * `mid` - A string that holds the message id.  Leading/Trailing <>
-/// characters are automatically stripped.
+/// * `mid` - A string that holds the message id
 pub(crate) fn dc_extract_grpid_from_rfc724_mid(mid: &str) -> Option<&str> {
-    let mid = mid.trim_start_matches('<').trim_end_matches('>');
-
    if mid.len() < 9 || !mid.starts_with("Gr.") {
        return None;
    }
@@ -222,6 +235,13 @@ pub(crate) fn dc_extract_grpid_from_rfc724_mid(mid: &str) -> Option<&str> {
    None
 }

+pub(crate) fn dc_ensure_no_slash_safe(path: &str) -> &str {
+    if path.ends_with('/') || path.ends_with('\\') {
+        return &path[..path.len() - 1];
+    }
+    path
+}
+
 // Function returns a sanitized basename that does not contain
 // win/linux path separators and also not any non-ascii chars
 fn get_safe_basename(filename: &str) -> String {
@@ -260,10 +280,13 @@ pub fn dc_derive_safe_stem_ext(filename: &str) -> (String, String) {
 }

 // the returned suffix is lower-case
+#[allow(non_snake_case)]
 pub fn dc_get_filesuffix_lc(path_filename: impl AsRef<str>) -> Option<String> {
-    Path::new(path_filename.as_ref())
-        .extension()
-        .map(|p| p.to_string_lossy().to_lowercase())
+    if let Some(p) = Path::new(path_filename.as_ref()).extension() {
+        Some(p.to_string_lossy().to_lowercase())
+    } else {
+        None
+    }
 }

 /// Returns the `(width, height)` of the given image buffer.
@@ -380,14 +403,11 @@ pub(crate) fn dc_copy_file(
    }
 }

-pub(crate) fn dc_create_folder(
-    context: &Context,
-    path: impl AsRef<std::path::Path>,
-) -> Result<(), std::io::Error> {
+pub(crate) fn dc_create_folder(context: &Context, path: impl AsRef<std::path::Path>) -> bool {
    let path_abs = dc_get_abs_path(context, &path);
    if !path_abs.exists() {
        match fs::create_dir_all(path_abs) {
-            Ok(_) => Ok(()),
+            Ok(_) => true,
            Err(err) => {
                warn!(
                    context,
@@ -395,11 +415,11 @@ pub(crate) fn dc_create_folder(
                    path.as_ref().display(),
                    err
                );
-                Err(err)
+                false
            }
        }
    } else {
-        Ok(())
+        true
    }
 }

@@ -485,7 +505,7 @@ pub(crate) fn dc_get_next_backup_path(
 pub(crate) fn time() -> i64 {
    SystemTime::now()
        .duration_since(SystemTime::UNIX_EPOCH)
-        .unwrap_or_default()
+        .unwrap()
        .as_secs() as i64
 }

@@ -675,16 +695,6 @@ mod tests {
        let mid = "Gr.1234567890123456.morerandom@domain.de";
        let grpid = dc_extract_grpid_from_rfc724_mid(mid);
        assert_eq!(grpid, Some("1234567890123456"));
-
-        // Should return extracted grpid for grpid with length of 11
-        let mid = "<Gr.12345678901.morerandom@domain.de>";
-        let grpid = dc_extract_grpid_from_rfc724_mid(mid);
-        assert_eq!(grpid, Some("12345678901"));
-
-        // Should return extracted grpid for grpid with length of 11
-        let mid = "<Gr.1234567890123456.morerandom@domain.de>";
-        let grpid = dc_extract_grpid_from_rfc724_mid(mid);
-        assert_eq!(grpid, Some("1234567890123456"));
    }

    #[test]
@@ -766,6 +776,14 @@ mod tests {
        }
    }

+    #[test]
+    fn test_dc_create_incoming_rfc724_mid() {
+        let res = dc_create_incoming_rfc724_mid(123, 45, &vec![6, 7]);
+        assert_eq!(res, Some("123-45-7@stub".into()));
+        let res = dc_create_incoming_rfc724_mid(123, 45, &vec![]);
+        assert_eq!(res, Some("123-45-0@stub".into()));
+    }
+
    #[test]
    fn test_file_get_safe_basename() {
        assert_eq!(get_safe_basename("12312/hello"), "hello");
@@ -827,7 +845,7 @@ mod tests {

        assert!(dc_delete_file(context, "$BLOBDIR/foobar"));
        assert!(dc_delete_file(context, "$BLOBDIR/dada"));
-        assert!(dc_create_folder(context, "$BLOBDIR/foobar-folder").is_ok());
+        assert!(dc_create_folder(context, "$BLOBDIR/foobar-folder"));
        assert!(dc_file_exist(context, "$BLOBDIR/foobar-folder",));
        assert!(!dc_delete_file(context, "$BLOBDIR/foobar-folder"));

@@ -841,15 +859,15 @@ mod tests {
    #[test]
    fn test_listflags_has() {
        let listflags: u32 = 0x1101;
-        assert!(listflags_has(listflags, 0x1));
-        assert!(!listflags_has(listflags, 0x10));
-        assert!(listflags_has(listflags, 0x100));
-        assert!(listflags_has(listflags, 0x1000));
+        assert!(listflags_has(listflags, 0x1) == true);
+        assert!(listflags_has(listflags, 0x10) == false);
+        assert!(listflags_has(listflags, 0x100) == true);
+        assert!(listflags_has(listflags, 0x1000) == true);
        let listflags: u32 = (DC_GCL_ADD_SELF | DC_GCL_VERIFIED_ONLY).try_into().unwrap();
-        assert!(listflags_has(listflags, DC_GCL_VERIFIED_ONLY));
-        assert!(listflags_has(listflags, DC_GCL_ADD_SELF));
+        assert!(listflags_has(listflags, DC_GCL_VERIFIED_ONLY) == true);
+        assert!(listflags_has(listflags, DC_GCL_ADD_SELF) == true);
        let listflags: u32 = DC_GCL_VERIFIED_ONLY.try_into().unwrap();
-        assert!(!listflags_has(listflags, DC_GCL_ADD_SELF));
+        assert!(listflags_has(listflags, DC_GCL_ADD_SELF) == false);
    }

    #[test]
--- a/src/dehtml.rs
+++ b/src/dehtml.rs
@@ -139,12 +139,13 @@ fn dehtml_starttag_cb<B: std::io::BufRead>(
            dehtml.add_text = AddText::YesPreserveLineEnds;
        }
        "a" => {
-            if let Some(href) = event
-                .html_attributes()
-                .filter_map(|attr| attr.ok())
-                .find(|attr| String::from_utf8_lossy(attr.key).trim().to_lowercase() == "href")
-            {
+            if let Some(href) = event.html_attributes().find(|attr| {
+                attr.as_ref()
+                    .map(|a| String::from_utf8_lossy(a.key).trim().to_lowercase() == "href")
+                    .unwrap_or_default()
+            }) {
                let href = href
+                    .unwrap()
                    .unescape_and_decode_value(reader)
                    .unwrap_or_default()
                    .to_lowercase();
@@ -188,41 +189,4 @@ mod tests {
            assert_eq!(dehtml(input), output);
        }
    }
-
-    #[test]
-    fn test_dehtml_parse_br() {
-        let html = "\r\r\nline1<br>\r\n\r\n\r\rline2\n\r";
-        let plain = dehtml(html);
-
-        assert_eq!(plain, "line1\n\r\r\rline2");
-    }
-
-    #[test]
-    fn test_dehtml_parse_href() {
-        let html = "<a href=url>text</a";
-        let plain = dehtml(html);
-
-        assert_eq!(plain, "[text](url)");
-    }
-
-    #[test]
-    fn test_dehtml_bold_text() {
-        let html = "<!DOCTYPE name [<!DOCTYPE ...>]><!-- comment -->text <b><?php echo ... ?>bold</b><![CDATA[<>]]>";
-        let plain = dehtml(html);
-
-        assert_eq!(plain, "text *bold*<>");
-    }
-
-    #[test]
-    fn test_dehtml_html_encoded() {
-        let html =
-                "&lt;&gt;&quot;&apos;&amp; &auml;&Auml;&ouml;&Ouml;&uuml;&Uuml;&szlig; foo&AElig;&ccedil;&Ccedil; &diams;&lrm;&rlm;&zwnj;&noent;&zwj;";
-
-        let plain = dehtml(html);
-
-        assert_eq!(
-            plain,
-            "<>\"\'& äÄöÖüÜß fooÆçÇ \u{2666}\u{200e}\u{200f}\u{200c}&noent;\u{200d}"
-        );
-    }
 }
--- a/src/e2ee.rs
+++ b/src/e2ee.rs
@@ -2,7 +2,7 @@

 use std::collections::HashSet;

-use mailparse::{MailHeaderMap, ParsedMail};
+use mailparse::MailHeaderMap;
 use num_traits::FromPrimitive;

 use crate::aheader::*;
@@ -14,6 +14,7 @@ use crate::keyring::*;
 use crate::peerstate::*;
 use crate::pgp;
 use crate::securejoin::handle_degrade_event;
+use crate::wrapmime;

 #[derive(Debug)]
 pub struct EncryptHelper {
@@ -97,6 +98,7 @@ impl EncryptHelper {
            .iter()
            .filter_map(|(state, addr)| state.as_ref().map(|s| (s, addr)))
        {
+            info!(context, "adding for {}: {:?}", addr, peerstate);
            let key = peerstate.peek_key(min_verified).ok_or_else(|| {
                format_err!("proper enc-key for {} missing, cannot encrypt", addr)
            })?;
@@ -117,9 +119,11 @@ impl EncryptHelper {

 pub fn try_decrypt(
    context: &Context,
-    mail: &ParsedMail<'_>,
+    mail: &mailparse::ParsedMail<'_>,
    message_time: i64,
 ) -> Result<(Option<Vec<u8>>, HashSet<String>)> {
+    info!(context, "trying to decrypt");
+
    let from = mail
        .headers
        .get_first_value("From")?
@@ -209,7 +213,7 @@ fn load_or_generate_self_public_key(context: &Context, self_addr: impl AsRef<str
    );
    match pgp::create_keypair(&self_addr) {
        Some((public_key, private_key)) => {
-            if dc_key_save_self_keypair(
+            match dc_key_save_self_keypair(
                context,
                &public_key,
                &private_key,
@@ -217,50 +221,24 @@ fn load_or_generate_self_public_key(context: &Context, self_addr: impl AsRef<str
                true,
                &context.sql,
            ) {
-                info!(
-                    context,
-                    "Keypair generated in {:.3}s.",
-                    start.elapsed().as_secs()
-                );
-                Ok(public_key)
-            } else {
-                Err(format_err!("Failed to save keypair"))
+                true => {
+                    info!(
+                        context,
+                        "Keypair generated in {:.3}s.",
+                        start.elapsed().as_secs()
+                    );
+                    Ok(public_key)
+                }
+                false => Err(format_err!("Failed to save keypair")),
            }
        }
        None => Err(format_err!("Failed to generate keypair")),
    }
 }

-/// Returns a reference to the encrypted payload and validates the autocrypt structure.
-fn get_autocrypt_mime<'a, 'b>(mail: &'a ParsedMail<'b>) -> Result<&'a ParsedMail<'b>> {
-    ensure!(
-        mail.ctype.mimetype == "multipart/encrypted",
-        "Not a multipart/encrypted message: {}",
-        mail.ctype.mimetype
-    );
-    ensure!(
-        mail.subparts.len() == 2,
-        "Invalid Autocrypt Level 1 Mime Parts"
-    );
-
-    ensure!(
-        mail.subparts[0].ctype.mimetype == "application/pgp-encrypted",
-        "Invalid Autocrypt Level 1 version part: {:?}",
-        mail.subparts[0].ctype,
-    );
-
-    ensure!(
-        mail.subparts[1].ctype.mimetype == "application/octet-stream",
-        "Invalid Autocrypt Level 1 encrypted part: {:?}",
-        mail.subparts[1].ctype
-    );
-
-    Ok(&mail.subparts[1])
-}
-
 fn decrypt_if_autocrypt_message<'a>(
    context: &Context,
-    mail: &ParsedMail<'a>,
+    mail: &mailparse::ParsedMail<'a>,
    private_keyring: &Keyring,
    public_keyring_for_validate: &Keyring,
    ret_valid_signatures: &mut HashSet<String>,
@@ -272,14 +250,14 @@ fn decrypt_if_autocrypt_message<'a>(
    //
    // Errors are returned for failures related to decryption of AC-messages.

-    let encrypted_data_part = match get_autocrypt_mime(mail) {
-        Err(_) => {
-            // not an autocrypt mime message, abort and ignore
+    let encrypted_data_part = match wrapmime::get_autocrypt_mime(mail) {
+        Err(err) => {
+            // not a proper autocrypt message, abort and ignore
+            warn!(context, "Invalid autocrypt message: {:?}", err);
            return Ok(None);
        }
        Ok(res) => res,
    };
-    info!(context, "Detected Autocrypt-mime message");

    decrypt_part(
        context,
@@ -292,12 +270,13 @@ fn decrypt_if_autocrypt_message<'a>(

 /// Returns Ok(None) if nothing encrypted was found.
 fn decrypt_part(
-    _context: &Context,
-    mail: &ParsedMail<'_>,
+    context: &Context,
+    mail: &mailparse::ParsedMail<'_>,
    private_keyring: &Keyring,
    public_keyring_for_validate: &Keyring,
    ret_valid_signatures: &mut HashSet<String>,
 ) -> Result<Option<Vec<u8>>> {
+    info!(context, "decrypting part");
    let data = mail.get_body_raw()?;

    if has_decrypted_pgp_armor(&data) {
@@ -339,7 +318,7 @@ fn has_decrypted_pgp_armor(input: &[u8]) -> bool {
 /// However, Delta Chat itself has no problem with encrypted multipart/report
 /// parts and MUAs should be encouraged to encrpyt multipart/reports as well so
 /// that we could use the normal Autocrypt processing.
-fn contains_report(mail: &ParsedMail<'_>) -> bool {
+fn contains_report(mail: &mailparse::ParsedMail<'_>) -> bool {
    mail.ctype.mimetype == "multipart/report"
 }

--- a/src/error.rs
+++ b/src/error.rs
@@ -1,59 +1,38 @@
-//! # Error handling
-
+use failure::Fail;
 use lettre_email::mime;

 #[derive(Debug, Fail)]
 pub enum Error {
    #[fail(display = "{:?}", _0)]
    Failure(failure::Error),
-
    #[fail(display = "SQL error: {:?}", _0)]
    SqlError(#[cause] crate::sql::Error),
-
    #[fail(display = "{:?}", _0)]
    Io(std::io::Error),
-
    #[fail(display = "{:?}", _0)]
    Message(String),
-
    #[fail(display = "{:?}", _0)]
    Image(image_meta::ImageError),
-
    #[fail(display = "{:?}", _0)]
    Utf8(std::str::Utf8Error),
-
    #[fail(display = "PGP: {:?}", _0)]
    Pgp(pgp::errors::Error),
-
    #[fail(display = "Base64Decode: {:?}", _0)]
    Base64Decode(base64::DecodeError),
-
    #[fail(display = "{:?}", _0)]
    FromUtf8(std::string::FromUtf8Error),
-
    #[fail(display = "{}", _0)]
    BlobError(#[cause] crate::blob::BlobError),
-
    #[fail(display = "Invalid Message ID.")]
    InvalidMsgId,
-
    #[fail(display = "Watch folder not found {:?}", _0)]
    WatchFolderNotFound(String),
-
-    #[fail(display = "Invalid Email: {:?}", _0)]
+    #[fail(display = "Inalid Email: {:?}", _0)]
    MailParseError(#[cause] mailparse::MailParseError),
-
    #[fail(display = "Building invalid Email: {:?}", _0)]
    LettreError(#[cause] lettre_email::error::Error),
-
-    #[fail(display = "SMTP error: {:?}", _0)]
-    SmtpError(#[cause] async_smtp::error::Error),
-
    #[fail(display = "FromStr error: {:?}", _0)]
    FromStr(#[cause] mime::FromStrError),
-
-    #[fail(display = "Not Configured")]
-    NotConfigured,
 }

 pub type Result<T> = std::result::Result<T, Error>;
--- a/src/events.rs
+++ b/src/events.rs
@@ -1,5 +1,3 @@
-//! # Events specification
-
 use std::path::PathBuf;

 use strum::EnumProperty;
@@ -21,38 +19,56 @@ pub enum Event {
    /// The library-user may write an informational string to the log.
    /// Passed to the callback given to dc_context_new().
    /// This event should not be reported to the end-user using a popup or something like that.
+    ///
+    /// @return 0
    #[strum(props(id = "100"))]
    Info(String),

    /// Emitted when SMTP connection is established and login was successful.
+    ///
+    /// @return 0
    #[strum(props(id = "101"))]
    SmtpConnected(String),

    /// Emitted when IMAP connection is established and login was successful.
+    ///
+    /// @return 0
    #[strum(props(id = "102"))]
    ImapConnected(String),

    /// Emitted when a message was successfully sent to the SMTP server.
+    ///
+    /// @return 0
    #[strum(props(id = "103"))]
    SmtpMessageSent(String),

    /// Emitted when an IMAP message has been marked as deleted
+    ///
+    /// @return 0
    #[strum(props(id = "104"))]
    ImapMessageDeleted(String),

    /// Emitted when an IMAP message has been moved
+    ///
+    /// @return 0
    #[strum(props(id = "105"))]
    ImapMessageMoved(String),

    /// Emitted when an IMAP folder was emptied
+    ///
+    /// @return 0
    #[strum(props(id = "106"))]
    ImapFolderEmptied(String),

    /// Emitted when an new file in the $BLOBDIR was created
+    ///
+    /// @return 0
    #[strum(props(id = "150"))]
    NewBlobFile(String),

    /// Emitted when an new file in the $BLOBDIR was created
+    ///
+    /// @return 0
    #[strum(props(id = "151"))]
    DeletedBlobFile(String),

@@ -60,6 +76,8 @@ pub enum Event {
    /// Passed to the callback given to dc_context_new().
    ///
    /// This event should not be reported to the end-user using a popup or something like that.
+    ///
+    /// @return 0
    #[strum(props(id = "300"))]
    Warning(String),

@@ -72,8 +90,10 @@ pub enum Event {
    /// However, for ongoing processes (eg. configure())
    /// or for functions that are expected to fail (eg. dc_continue_key_transfer())
    /// it might be better to delay showing these events until the function has really
-    /// failed (returned false). It should be sufficient to report only the *last* error
+    /// failed (returned false). It should be sufficient to report only the _last_ error
    /// in a messasge box then.
+    ///
+    /// @return
    #[strum(props(id = "400"))]
    Error(String),

@@ -90,6 +110,8 @@ pub enum Event {
    /// Moreover, if the UI detects that the device is offline,
    /// it is probably more useful to report this to the user
    /// instead of the string from data2.
+    ///
+    /// @return 0
    #[strum(props(id = "401"))]
    ErrorNetwork(String),

@@ -98,6 +120,8 @@ pub enum Event {
    /// dc_set_chat_name(), dc_set_chat_profile_image(),
    /// dc_add_contact_to_chat(), dc_remove_contact_from_chat(),
    /// dc_send_text_msg() or another sending function.
+    ///
+    /// @return 0
    #[strum(props(id = "410"))]
    ErrorSelfNotInGroup(String),

@@ -106,6 +130,8 @@ pub enum Event {
    /// - Messages sent, received or removed
    /// - Chats created, deleted or archived
    /// - A draft has been set
+    ///
+    /// @return 0
    #[strum(props(id = "2000"))]
    MsgsChanged { chat_id: u32, msg_id: MsgId },

@@ -113,21 +139,29 @@ pub enum Event {
    /// when receiving this message.
    ///
    /// There is no extra #DC_EVENT_MSGS_CHANGED event send together with this event.
+    ///
+    /// @return 0
    #[strum(props(id = "2005"))]
    IncomingMsg { chat_id: u32, msg_id: MsgId },

    /// A single message is sent successfully. State changed from  DC_STATE_OUT_PENDING to
    /// DC_STATE_OUT_DELIVERED, see dc_msg_get_state().
+    ///
+    /// @return 0
    #[strum(props(id = "2010"))]
    MsgDelivered { chat_id: u32, msg_id: MsgId },

    /// A single message could not be sent. State changed from DC_STATE_OUT_PENDING or DC_STATE_OUT_DELIVERED to
    /// DC_STATE_OUT_FAILED, see dc_msg_get_state().
+    ///
+    /// @return 0
    #[strum(props(id = "2012"))]
    MsgFailed { chat_id: u32, msg_id: MsgId },

    /// A single message is read by the receiver. State changed from DC_STATE_OUT_DELIVERED to
    /// DC_STATE_OUT_MDN_RCVD, see dc_msg_get_state().
+    ///
+    /// @return 0
    #[strum(props(id = "2015"))]
    MsgRead { chat_id: u32, msg_id: MsgId },

@@ -135,12 +169,15 @@ pub enum Event {
    /// Or the verify state of a chat has changed.
    /// See dc_set_chat_name(), dc_set_chat_profile_image(), dc_add_contact_to_chat()
    /// and dc_remove_contact_from_chat().
+    ///
+    /// @return 0
    #[strum(props(id = "2020"))]
    ChatModified(u32),

    /// Contact(s) created, renamed, blocked or deleted.
    ///
    /// @param data1 (int) If set, this is the contact_id of an added contact that should be selected.
+    /// @return 0
    #[strum(props(id = "2030"))]
    ContactsChanged(Option<u32>),

@@ -149,12 +186,14 @@ pub enum Event {
    /// @param data1 (u32) contact_id of the contact for which the location has changed.
    ///     If the locations of several contacts have been changed,
    ///     eg. after calling dc_delete_all_locations(), this parameter is set to `None`.
+    /// @return 0
    #[strum(props(id = "2035"))]
    LocationChanged(Option<u32>),

    /// Inform about the configuration progress started by configure().
    ///
    /// @param data1 (usize) 0=error, 1-999=progress in permille, 1000=success and done
+    /// @return 0
    #[strum(props(id = "2041"))]
    ConfigureProgress(usize),

@@ -162,6 +201,7 @@ pub enum Event {
    ///
    /// @param data1 (usize) 0=error, 1-999=progress in permille, 1000=success and done
    /// @param data2 0
+    /// @return 0
    #[strum(props(id = "2051"))]
    ImexProgress(usize),

@@ -172,6 +212,7 @@ pub enum Event {
    /// services.
    ///
    /// @param data2 0
+    /// @return 0
    #[strum(props(id = "2052"))]
    ImexFileWritten(PathBuf),

@@ -187,6 +228,7 @@ pub enum Event {
    ///     600=vg-/vc-request-with-auth received, vg-member-added/vc-contact-confirm sent, typically shown as "bob@addr verified".
    ///     800=vg-member-added-received received, shown as "bob@addr securely joined GROUP", only sent for the verified-group-protocol.
    ///     1000=Protocol finished for this contact.
+    /// @return 0
    #[strum(props(id = "2060"))]
    SecurejoinInviterProgress { contact_id: u32, progress: usize },

@@ -198,12 +240,14 @@ pub enum Event {
    /// @param data2 (int) Progress as:
    ///     400=vg-/vc-request-with-auth sent, typically shown as "alice@addr verified, introducing myself."
    ///     (Bob has verified alice and waits until Alice does the same for him)
+    /// @return 0
    #[strum(props(id = "2061"))]
    SecurejoinJoinerProgress { contact_id: u32, progress: usize },

    /// This event is sent out to the inviter when a joiner successfully joined a group.
    /// @param data1 (int) chat_id
    /// @param data2 (int) contact_id
+    /// @return 0
    #[strum(props(id = "2062"))]
    SecurejoinMemberAdded { chat_id: u32, contact_id: u32 },
 }
--- a/src/headerdef.rs
+++ b/src/headerdef.rs
@@ -1,58 +0,0 @@
-#[derive(Debug, Display, Clone, PartialEq, Eq, EnumVariantNames)]
-#[strum(serialize_all = "kebab_case")]
-#[allow(dead_code)]
-pub enum HeaderDef {
-    MessageId,
-    Subject,
-    Date,
-    From_,
-    To,
-    Cc,
-    Disposition,
-    OriginalMessageId,
-    ListId,
-    References,
-    InReplyTo,
-    Precedence,
-    ChatVersion,
-    ChatGroupId,
-    ChatGroupName,
-    ChatGroupNameChanged,
-    ChatVerified,
-    ChatGroupImage, // deprecated
-    ChatGroupAvatar,
-    ChatUserAvatar,
-    ChatVoiceMessage,
-    ChatGroupMemberRemoved,
-    ChatGroupMemberAdded,
-    ChatContent,
-    ChatDuration,
-    ChatDispositionNotificationTo,
-    AutocryptSetupMessage,
-    SecureJoin,
-    SecureJoinGroup,
-    SecureJoinFingerprint,
-    SecureJoinInvitenumber,
-    SecureJoinAuth,
-    _TestHeader,
-}
-
-impl HeaderDef {
-    /// Returns the corresponding Event id.
-    pub fn get_headername(&self) -> String {
-        self.to_string()
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    /// Test that kebab_case serialization works as expected
-    fn kebab_test() {
-        assert_eq!(HeaderDef::From_.to_string(), "from");
-
-        assert_eq!(HeaderDef::_TestHeader.to_string(), "test-header");
-    }
-}
--- a/src/imap/mod.rs
+++ b/src/imap/mod.rs
@@ -4,11 +4,14 @@
 //! to implement connect, fetch, delete functionality with standard IMAP servers.

 use std::sync::atomic::{AtomicBool, Ordering};
+use std::time::{Duration, SystemTime};

 use async_imap::{
    error::Result as ImapResult,
-    types::{Capability, Fetch, Flag, Mailbox, Name, NameAttribute},
+    extensions::idle::IdleResponse,
+    types::{Fetch, Flag, Mailbox, Name, NameAttribute},
 };
+use async_std::prelude::*;
 use async_std::sync::{Mutex, RwLock};
 use async_std::task;

@@ -23,9 +26,7 @@ use crate::message::{self, update_server_uid};
 use crate::oauth2::dc_get_oauth2_access_token;
 use crate::param::Params;
 use crate::stock::StockMessage;
-
-mod idle;
-pub mod select_folder;
+use crate::wrapmime;

 const DC_IMAP_SEEN: usize = 0x0001;

@@ -33,6 +34,9 @@ type Result<T> = std::result::Result<T, Error>;

 #[derive(Debug, Fail)]
 pub enum Error {
+    #[fail(display = "IMAP Could not obtain imap-session object.")]
+    NoSession,
+
    #[fail(display = "IMAP Connect without configured params")]
    ConnectWithoutConfigure,

@@ -48,24 +52,33 @@ pub enum Error {
    #[fail(display = "IMAP Could not login as {}", _0)]
    LoginFailed(String),

-    #[fail(display = "IMAP Could not fetch")]
+    #[fail(display = "IMAP Could not fetch {}", _0)]
    FetchFailed(#[cause] async_imap::error::Error),

+    #[fail(display = "IMAP IDLE protocol failed to init/complete")]
+    IdleProtocolFailed(#[cause] async_imap::error::Error),
+
+    #[fail(display = "IMAP server does not have IDLE capability")]
+    IdleAbilityMissing,
+
+    #[fail(display = "IMAP Connection Lost or no connection established")]
+    ConnectionLost,
+
+    #[fail(display = "IMAP close/expunge failed: {}", _0)]
+    CloseExpungeFailed(#[cause] async_imap::error::Error),
+
+    #[fail(display = "IMAP Folder name invalid: {:?}", _0)]
+    BadFolderName(String),
+
    #[fail(display = "IMAP operation attempted while it is torn down")]
    InTeardown,

    #[fail(display = "IMAP operation attempted while it is torn down")]
    SqlError(#[cause] crate::sql::Error),

-    #[fail(display = "IMAP got error from elsewhere")]
+    #[fail(display = "IMAP got error from elsewhere: {:?}", _0)]
    WrappedError(#[cause] crate::error::Error),

-    #[fail(display = "IMAP select folder error")]
-    SelectFolderError(#[cause] select_folder::Error),
-
-    #[fail(display = "No mailbox selected, folder: {:?}", _0)]
-    NoMailbox(String),
-
    #[fail(display = "IMAP other error: {:?}", _0)]
    Other(String),
 }
@@ -88,12 +101,6 @@ impl From<Error> for crate::error::Error {
    }
 }

-impl From<select_folder::Error> for Error {
-    fn from(err: select_folder::Error) -> Error {
-        Error::SelectFolderError(err)
-    }
-}
-
 #[derive(Debug, Display, Clone, Copy, PartialEq, Eq)]
 pub enum ImapActionResult {
    Failed,
@@ -107,7 +114,7 @@ const JUST_UID: &str = "(UID)";
 const BODY_FLAGS: &str = "(FLAGS BODY.PEEK[])";
 const SELECT_ALL: &str = "1:*";

-#[derive(Debug, Default)]
+#[derive(Debug)]
 pub struct Imap {
    config: RwLock<ImapConfig>,
    session: Mutex<Option<Session>>,
@@ -180,7 +187,14 @@ impl Default for ImapConfig {

 impl Imap {
    pub fn new() -> Self {
-        Default::default()
+        Imap {
+            session: Mutex::new(None),
+            config: RwLock::new(ImapConfig::default()),
+            interrupt: Mutex::new(None),
+            connected: Mutex::new(false),
+            skip_next_idle_wait: AtomicBool::new(false),
+            should_reconnect: AtomicBool::new(false),
+        }
    }

    pub async fn is_connected(&self) -> bool {
@@ -195,107 +209,116 @@ impl Imap {
        self.should_reconnect.store(true, Ordering::Relaxed)
    }

-    async fn setup_handle_if_needed(&self, context: &Context) -> Result<()> {
-        if self.config.read().await.imap_server.is_empty() {
-            return Err(Error::InTeardown);
-        }
-
-        if self.should_reconnect() {
-            self.unsetup_handle(context).await;
-            self.should_reconnect.store(false, Ordering::Relaxed);
-        } else if self.is_connected().await {
-            return Ok(());
-        }
-
-        let server_flags = self.config.read().await.server_flags as i32;
-
-        let connection_res: ImapResult<Client> =
-            if (server_flags & (DC_LP_IMAP_SOCKET_STARTTLS | DC_LP_IMAP_SOCKET_PLAIN)) != 0 {
-                let config = self.config.read().await;
-                let imap_server: &str = config.imap_server.as_ref();
-                let imap_port = config.imap_port;
-
-                match Client::connect_insecure((imap_server, imap_port)).await {
-                    Ok(client) => {
-                        if (server_flags & DC_LP_IMAP_SOCKET_STARTTLS) != 0 {
-                            client.secure(imap_server, config.certificate_checks).await
-                        } else {
-                            Ok(client)
-                        }
-                    }
-                    Err(err) => Err(err),
-                }
-            } else {
-                let config = self.config.read().await;
-                let imap_server: &str = config.imap_server.as_ref();
-                let imap_port = config.imap_port;
-
-                Client::connect_secure(
-                    (imap_server, imap_port),
-                    imap_server,
-                    config.certificate_checks,
-                )
-                .await
-            };
-
-        let login_res = match connection_res {
-            Ok(client) => {
-                let config = self.config.read().await;
-                let imap_user: &str = config.imap_user.as_ref();
-                let imap_pw: &str = config.imap_pw.as_ref();
-
-                if (server_flags & DC_LP_AUTH_OAUTH2) != 0 {
-                    let addr: &str = config.addr.as_ref();
-
-                    if let Some(token) = dc_get_oauth2_access_token(context, addr, imap_pw, true) {
-                        let auth = OAuth2 {
-                            user: imap_user.into(),
-                            access_token: token,
-                        };
-                        client.authenticate("XOAUTH2", &auth).await
-                    } else {
-                        return Err(Error::OauthError);
-                    }
-                } else {
-                    client.login(imap_user, imap_pw).await
-                }
+    fn setup_handle_if_needed(&self, context: &Context) -> Result<()> {
+        task::block_on(async move {
+            if self.config.read().await.imap_server.is_empty() {
+                return Err(Error::InTeardown);
            }
-            Err(err) => {
-                let message = {
+
+            if self.should_reconnect() {
+                self.unsetup_handle(context).await;
+                self.should_reconnect.store(false, Ordering::Relaxed);
+            } else if self.is_connected().await {
+                return Ok(());
+            }
+
+            let server_flags = self.config.read().await.server_flags as i32;
+
+            let connection_res: ImapResult<Client> =
+                if (server_flags & (DC_LP_IMAP_SOCKET_STARTTLS | DC_LP_IMAP_SOCKET_PLAIN)) != 0 {
                    let config = self.config.read().await;
                    let imap_server: &str = config.imap_server.as_ref();
                    let imap_port = config.imap_port;
-                    context.stock_string_repl_str2(
-                        StockMessage::ServerResponse,
-                        format!("{}:{}", imap_server, imap_port),
-                        err.to_string(),
+
+                    match Client::connect_insecure((imap_server, imap_port)).await {
+                        Ok(client) => {
+                            if (server_flags & DC_LP_IMAP_SOCKET_STARTTLS) != 0 {
+                                let res =
+                                    client.secure(imap_server, config.certificate_checks).await;
+                                res
+                            } else {
+                                Ok(client)
+                            }
+                        }
+                        Err(err) => Err(err),
+                    }
+                } else {
+                    let config = self.config.read().await;
+                    let imap_server: &str = config.imap_server.as_ref();
+                    let imap_port = config.imap_port;
+
+                    Client::connect_secure(
+                        (imap_server, imap_port),
+                        imap_server,
+                        config.certificate_checks,
                    )
+                    .await
                };
-                // IMAP connection failures are reported to users
-                emit_event!(context, Event::ErrorNetwork(message));
-                return Err(Error::ConnectionFailed(err.to_string()));
-            }
-        };

-        self.should_reconnect.store(false, Ordering::Relaxed);
+            let login_res = match connection_res {
+                Ok(client) => {
+                    let config = self.config.read().await;
+                    let imap_user: &str = config.imap_user.as_ref();
+                    let imap_pw: &str = config.imap_pw.as_ref();

-        match login_res {
-            Ok(session) => {
-                *self.session.lock().await = Some(session);
-                Ok(())
-            }
-            Err((err, _)) => {
-                let imap_user = self.config.read().await.imap_user.to_owned();
-                let message = context.stock_string_repl_str(StockMessage::CannotLogin, &imap_user);
+                    if (server_flags & DC_LP_AUTH_OAUTH2) != 0 {
+                        let addr: &str = config.addr.as_ref();

-                emit_event!(
-                    context,
-                    Event::ErrorNetwork(format!("{} ({})", message, err))
-                );
-                self.trigger_reconnect();
-                Err(Error::LoginFailed(format!("cannot login as {}", imap_user)))
+                        if let Some(token) =
+                            dc_get_oauth2_access_token(context, addr, imap_pw, true)
+                        {
+                            let auth = OAuth2 {
+                                user: imap_user.into(),
+                                access_token: token,
+                            };
+                            let res = client.authenticate("XOAUTH2", &auth).await;
+                            res
+                        } else {
+                            return Err(Error::OauthError);
+                        }
+                    } else {
+                        let res = client.login(imap_user, imap_pw).await;
+                        res
+                    }
+                }
+                Err(err) => {
+                    let message = {
+                        let config = self.config.read().await;
+                        let imap_server: &str = config.imap_server.as_ref();
+                        let imap_port = config.imap_port;
+                        context.stock_string_repl_str2(
+                            StockMessage::ServerResponse,
+                            format!("{}:{}", imap_server, imap_port),
+                            err.to_string(),
+                        )
+                    };
+                    // IMAP connection failures are reported to users
+                    emit_event!(context, Event::ErrorNetwork(message));
+                    return Err(Error::ConnectionFailed(err.to_string()));
+                }
+            };
+
+            self.should_reconnect.store(false, Ordering::Relaxed);
+
+            match login_res {
+                Ok(session) => {
+                    *self.session.lock().await = Some(session);
+                    Ok(())
+                }
+                Err((err, _)) => {
+                    let imap_user = self.config.read().await.imap_user.to_owned();
+                    let message =
+                        context.stock_string_repl_str(StockMessage::CannotLogin, &imap_user);
+
+                    emit_event!(
+                        context,
+                        Event::ErrorNetwork(format!("{} ({})", message, err))
+                    );
+                    self.trigger_reconnect();
+                    Err(Error::LoginFailed(format!("cannot login as {}", imap_user)))
+                }
            }
-        }
+        })
    }

    async fn unsetup_handle(&self, context: &Context) {
@@ -331,7 +354,9 @@ impl Imap {

    /// Connects to imap account using already-configured parameters.
    pub fn connect_configured(&self, context: &Context) -> Result<()> {
-        if async_std::task::block_on(self.is_connected()) && !self.should_reconnect() {
+        if async_std::task::block_on(async move {
+            self.is_connected().await && !self.should_reconnect()
+        }) {
            return Ok(());
        }
        if !context.sql.get_raw_config_bool(context, "configured") {
@@ -341,89 +366,86 @@ impl Imap {
        let param = LoginParam::from_database(context, "configured_");
        // the trailing underscore is correct

-        if task::block_on(self.connect(context, &param)) {
+        if self.connect(context, &param) {
            self.ensure_configured_folders(context, true)
        } else {
-            Err(Error::ConnectionFailed(format!("{}", param)))
+            Err(Error::ConnectionFailed(format!("{}", param).to_string()))
        }
    }

    /// tries connecting to imap account using the specific login
    /// parameters
-    pub async fn connect(&self, context: &Context, lp: &LoginParam) -> bool {
-        if lp.mail_server.is_empty() || lp.mail_user.is_empty() || lp.mail_pw.is_empty() {
-            return false;
-        }
+    pub fn connect(&self, context: &Context, lp: &LoginParam) -> bool {
+        task::block_on(async move {
+            if lp.mail_server.is_empty() || lp.mail_user.is_empty() || lp.mail_pw.is_empty() {
+                return false;
+            }

-        {
-            let addr = &lp.addr;
-            let imap_server = &lp.mail_server;
-            let imap_port = lp.mail_port as u16;
-            let imap_user = &lp.mail_user;
-            let imap_pw = &lp.mail_pw;
-            let server_flags = lp.server_flags as usize;
+            {
+                let addr = &lp.addr;
+                let imap_server = &lp.mail_server;
+                let imap_port = lp.mail_port as u16;
+                let imap_user = &lp.mail_user;
+                let imap_pw = &lp.mail_pw;
+                let server_flags = lp.server_flags as usize;

-            let mut config = self.config.write().await;
-            config.addr = addr.to_string();
-            config.imap_server = imap_server.to_string();
-            config.imap_port = imap_port;
-            config.imap_user = imap_user.to_string();
-            config.imap_pw = imap_pw.to_string();
-            config.certificate_checks = lp.imap_certificate_checks;
-            config.server_flags = server_flags;
-        }
+                let mut config = self.config.write().await;
+                config.addr = addr.to_string();
+                config.imap_server = imap_server.to_string();
+                config.imap_port = imap_port;
+                config.imap_user = imap_user.to_string();
+                config.imap_pw = imap_pw.to_string();
+                config.certificate_checks = lp.imap_certificate_checks;
+                config.server_flags = server_flags;
+            }

-        if let Err(err) = self.setup_handle_if_needed(context).await {
-            warn!(context, "failed to setup imap handle: {}", err);
-            self.free_connect_params().await;
-            return false;
-        }
+            if let Err(err) = self.setup_handle_if_needed(context) {
+                warn!(context, "failed to setup imap handle: {}", err);
+                self.free_connect_params().await;
+                return false;
+            }

-        let teardown = match &mut *self.session.lock().await {
-            Some(ref mut session) => match session.capabilities().await {
-                Ok(caps) => {
-                    if !context.sql.is_open() {
-                        warn!(context, "IMAP-LOGIN as {} ok but ABORTING", lp.mail_user,);
-                        true
-                    } else {
-                        let can_idle = caps.has_str("IDLE");
-                        let has_xlist = caps.has_str("XLIST");
-                        let caps_list = caps.iter().fold(String::new(), |s, c| {
-                            if let Capability::Atom(x) = c {
-                                s + &format!(" {}", x)
-                            } else {
-                                s + &format!(" {:?}", c)
-                            }
-                        });
-
-                        self.config.write().await.can_idle = can_idle;
-                        self.config.write().await.has_xlist = has_xlist;
-                        *self.connected.lock().await = true;
-                        emit_event!(
-                            context,
-                            Event::ImapConnected(format!(
-                                "IMAP-LOGIN as {}, capabilities: {}",
-                                lp.mail_user, caps_list,
-                            ))
-                        );
-                        false
+            let teardown = match &mut *self.session.lock().await {
+                Some(ref mut session) => match session.capabilities().await {
+                    Ok(caps) => {
+                        if !context.sql.is_open() {
+                            warn!(context, "IMAP-LOGIN as {} ok but ABORTING", lp.mail_user,);
+                            true
+                        } else {
+                            let can_idle = caps.has_str("IDLE");
+                            let has_xlist = caps.has_str("XLIST");
+                            let caps_list = caps
+                                .iter()
+                                .fold(String::new(), |s, c| s + &format!(" {:?}", c));
+                            self.config.write().await.can_idle = can_idle;
+                            self.config.write().await.has_xlist = has_xlist;
+                            *self.connected.lock().await = true;
+                            emit_event!(
+                                context,
+                                Event::ImapConnected(format!(
+                                    "IMAP-LOGIN as {}, capabilities: {}",
+                                    lp.mail_user, caps_list,
+                                ))
+                            );
+                            false
+                        }
                    }
-                }
-                Err(err) => {
-                    info!(context, "CAPABILITY command error: {}", err);
-                    true
-                }
-            },
-            None => true,
-        };
+                    Err(err) => {
+                        info!(context, "CAPABILITY command error: {}", err);
+                        true
+                    }
+                },
+                None => true,
+            };

-        if teardown {
-            self.disconnect(context);
+            if teardown {
+                self.disconnect(context);

-            false
-        } else {
-            true
-        }
+                false
+            } else {
+                true
+            }
+        })
    }

    pub fn disconnect(&self, context: &Context) {
@@ -433,17 +455,106 @@ impl Imap {
        });
    }

-    pub async fn fetch(&self, context: &Context, watch_folder: &str) -> Result<()> {
-        if !context.sql.is_open() {
-            // probably shutdown
-            return Err(Error::InTeardown);
-        }
-        self.setup_handle_if_needed(context).await?;
+    pub fn fetch(&self, context: &Context, watch_folder: &str) -> Result<()> {
+        task::block_on(async move {
+            if !context.sql.is_open() {
+                // probably shutdown
+                return Err(Error::InTeardown);
+            }
+            while self
+                .fetch_from_single_folder(context, &watch_folder)
+                .await?
+            {
+                // We fetch until no more new messages are there.
+            }
+            Ok(())
+        })
+    }

-        while self.fetch_new_messages(context, &watch_folder).await? {
-            // We fetch until no more new messages are there.
+    /// select a folder, possibly update uid_validity and, if needed,
+    /// expunge the folder to remove delete-marked messages.
+    async fn select_folder<S: AsRef<str>>(
+        &self,
+        context: &Context,
+        folder: Option<S>,
+    ) -> Result<()> {
+        if self.session.lock().await.is_none() {
+            let mut cfg = self.config.write().await;
+            cfg.selected_folder = None;
+            cfg.selected_folder_needs_expunge = false;
+            return Err(Error::NoSession);
+        }
+
+        // if there is a new folder and the new folder is equal to the selected one, there's nothing to do.
+        // if there is _no_ new folder, we continue as we might want to expunge below.
+        if let Some(ref folder) = folder {
+            if let Some(ref selected_folder) = self.config.read().await.selected_folder {
+                if folder.as_ref() == selected_folder {
+                    return Ok(());
+                }
+            }
+        }
+
+        // deselect existing folder, if needed (it's also done implicitly by SELECT, however, without EXPUNGE then)
+        let needs_expunge = { self.config.read().await.selected_folder_needs_expunge };
+        if needs_expunge {
+            if let Some(ref folder) = self.config.read().await.selected_folder {
+                info!(context, "Expunge messages in \"{}\".", folder);
+
+                // A CLOSE-SELECT is considerably faster than an EXPUNGE-SELECT, see
+                // https://tools.ietf.org/html/rfc3501#section-6.4.2
+                if let Some(ref mut session) = &mut *self.session.lock().await {
+                    match session.close().await {
+                        Ok(_) => {
+                            info!(context, "close/expunge succeeded");
+                        }
+                        Err(err) => {
+                            return Err(Error::CloseExpungeFailed(err));
+                        }
+                    }
+                } else {
+                    return Err(Error::NoSession);
+                }
+            }
+            self.config.write().await.selected_folder_needs_expunge = false;
+        }
+
+        // select new folder
+        if let Some(ref folder) = folder {
+            if let Some(ref mut session) = &mut *self.session.lock().await {
+                let res = session.select(folder).await;
+
+                // https://tools.ietf.org/html/rfc3501#section-6.3.1
+                // says that if the server reports select failure we are in
+                // authenticated (not-select) state.
+
+                match res {
+                    Ok(mailbox) => {
+                        let mut config = self.config.write().await;
+                        config.selected_folder = Some(folder.as_ref().to_string());
+                        config.selected_mailbox = Some(mailbox);
+                        Ok(())
+                    }
+                    Err(async_imap::error::Error::ConnectionLost) => {
+                        self.trigger_reconnect();
+                        self.config.write().await.selected_folder = None;
+                        Err(Error::ConnectionLost)
+                    }
+                    Err(async_imap::error::Error::Validate(_)) => {
+                        Err(Error::BadFolderName(folder.as_ref().to_string()))
+                    }
+                    Err(err) => {
+                        self.config.write().await.selected_folder = None;
+                        self.trigger_reconnect();
+                        Err(Error::Other(err.to_string()))
+                    }
+                }
+            } else {
+                Err(Error::NoSession)
+            }
+        } else {
+            Ok(())
        }
-        Ok(())
    }

    fn get_config_last_seen_uid<S: AsRef<str>>(&self, context: &Context, folder: S) -> (u32, u32) {
@@ -481,10 +592,7 @@ impl Imap {
            let (uid_validity, last_seen_uid) = self.get_config_last_seen_uid(context, &folder);

            let config = self.config.read().await;
-            let mailbox = config
-                .selected_mailbox
-                .as_ref()
-                .ok_or_else(|| Error::NoMailbox(folder.to_string()))?;
+            let mailbox = config.selected_mailbox.as_ref().expect("just selected");

            let new_uid_validity = match mailbox.uid_validity {
                Some(v) => v,
@@ -550,7 +658,7 @@ impl Imap {
        })
    }

-    async fn fetch_new_messages<S: AsRef<str>>(
+    async fn fetch_from_single_folder<S: AsRef<str>>(
        &self,
        context: &Context,
        folder: S,
@@ -583,11 +691,9 @@ impl Imap {
        for msg in &list {
            let cur_uid = msg.uid.unwrap_or_default();
            if cur_uid <= last_seen_uid {
-                // seems that at least dovecot sends the last available UID
-                // even if we asked for higher UID+N:*
-                info!(
+                warn!(
                    context,
-                    "fetch_new_messages: ignoring uid {}, last seen was {}", cur_uid, last_seen_uid
+                    "unexpected uid {}, last seen was {}", cur_uid, last_seen_uid
                );
                continue;
            }
@@ -719,23 +825,217 @@ impl Imap {

            if !is_deleted && msg.body().is_some() {
                let body = msg.body().unwrap_or_default();
-                if let Err(err) =
-                    dc_receive_imf(context, &body, folder.as_ref(), server_uid, flags as u32)
-                {
-                    warn!(
-                        context,
-                        "dc_receive_imf failed for imap-message {}/{}: {:?}",
-                        folder.as_ref(),
-                        server_uid,
-                        err
-                    );
-                }
+                dc_receive_imf(context, &body, folder.as_ref(), server_uid, flags as u32);
            }
        }

        1
    }

+    pub fn idle(&self, context: &Context, watch_folder: Option<String>) -> Result<()> {
+        task::block_on(async move {
+            if !self.config.read().await.can_idle {
+                return Err(Error::IdleAbilityMissing);
+            }
+
+            self.setup_handle_if_needed(context)?;
+
+            self.select_folder(context, watch_folder.clone()).await?;
+
+            let session = self.session.lock().await.take();
+            let timeout = Duration::from_secs(23 * 60);
+            if let Some(session) = session {
+                match session.idle() {
+                    // BEWARE: If you change the Secure branch you
+                    // typically also need to change the Insecure branch.
+                    IdleHandle::Secure(mut handle) => {
+                        if let Err(err) = handle.init().await {
+                            return Err(Error::IdleProtocolFailed(err));
+                        }
+
+                        let (idle_wait, interrupt) = handle.wait_with_timeout(timeout);
+                        *self.interrupt.lock().await = Some(interrupt);
+
+                        if self.skip_next_idle_wait.load(Ordering::SeqCst) {
+                            // interrupt_idle has happened before we
+                            // provided self.interrupt
+                            self.skip_next_idle_wait.store(false, Ordering::SeqCst);
+                            std::mem::drop(idle_wait);
+                            info!(context, "Idle wait was skipped");
+                        } else {
+                            info!(context, "Idle entering wait-on-remote state");
+                            match idle_wait.await {
+                                IdleResponse::NewData(_) => {
+                                    info!(context, "Idle has NewData");
+                                }
+                                // TODO: idle_wait does not distinguish manual interrupts
+                                // from Timeouts if we would know it's a Timeout we could bail
+                                // directly and reconnect .
+                                IdleResponse::Timeout => {
+                                    info!(context, "Idle-wait timeout or interruption");
+                                }
+                                IdleResponse::ManualInterrupt => {
+                                    info!(context, "Idle wait was interrupted");
+                                }
+                            }
+                        }
+                        match handle.done().await {
+                            Ok(session) => {
+                                *self.session.lock().await = Some(Session::Secure(session));
+                            }
+                            Err(err) => {
+                                // if we cannot terminate IDLE it probably
+                                // means that we waited long (with idle_wait)
+                                // but the network went away/changed
+                                self.trigger_reconnect();
+                                return Err(Error::IdleProtocolFailed(err));
+                            }
+                        }
+                    }
+                    IdleHandle::Insecure(mut handle) => {
+                        if let Err(err) = handle.init().await {
+                            return Err(Error::IdleProtocolFailed(err));
+                        }
+
+                        let (idle_wait, interrupt) = handle.wait_with_timeout(timeout);
+                        *self.interrupt.lock().await = Some(interrupt);
+
+                        if self.skip_next_idle_wait.load(Ordering::SeqCst) {
+                            // interrupt_idle has happened before we
+                            // provided self.interrupt
+                            self.skip_next_idle_wait.store(false, Ordering::SeqCst);
+                            std::mem::drop(idle_wait);
+                            info!(context, "Idle wait was skipped");
+                        } else {
+                            info!(context, "Idle entering wait-on-remote state");
+                            match idle_wait.await {
+                                IdleResponse::NewData(_) => {
+                                    info!(context, "Idle has NewData");
+                                }
+                                // TODO: idle_wait does not distinguish manual interrupts
+                                // from Timeouts if we would know it's a Timeout we could bail
+                                // directly and reconnect .
+                                IdleResponse::Timeout => {
+                                    info!(context, "Idle-wait timeout or interruption");
+                                }
+                                IdleResponse::ManualInterrupt => {
+                                    info!(context, "Idle wait was interrupted");
+                                }
+                            }
+                        }
+                        match handle.done().await {
+                            Ok(session) => {
+                                *self.session.lock().await = Some(Session::Insecure(session));
+                            }
+                            Err(err) => {
+                                // if we cannot terminate IDLE it probably
+                                // means that we waited long (with idle_wait)
+                                // but the network went away/changed
+                                self.trigger_reconnect();
+                                return Err(Error::IdleProtocolFailed(err));
+                            }
+                        }
+                    }
+                }
+            }
+
+            Ok(())
+        })
+    }
+
+    pub(crate) fn fake_idle(&self, context: &Context, watch_folder: Option<String>) {
+        // Idle using polling. This is also needed if we're not yet configured -
+        // in this case, we're waiting for a configure job (and an interrupt).
+        task::block_on(async move {
+            let fake_idle_start_time = SystemTime::now();
+
+            info!(context, "IMAP-fake-IDLEing...");
+
+            let interrupt = stop_token::StopSource::new();
+
+            // check every minute if there are new messages
+            // TODO: grow sleep durations / make them more flexible
+            let interval = async_std::stream::interval(Duration::from_secs(60));
+            let mut interrupt_interval = interrupt.stop_token().stop_stream(interval);
+            *self.interrupt.lock().await = Some(interrupt);
+            if self.skip_next_idle_wait.load(Ordering::SeqCst) {
+                // interrupt_idle has happened before we
+                // provided self.interrupt
+                self.skip_next_idle_wait.store(false, Ordering::SeqCst);
+                info!(context, "fake-idle wait was skipped");
+            } else {
+                // loop until we are interrupted or if we fetched something
+                while let Some(_) = interrupt_interval.next().await {
+                    // try to connect with proper login params
+                    // (setup_handle_if_needed might not know about them if we
+                    // never successfully connected)
+                    if let Err(err) = self.connect_configured(context) {
+                        warn!(context, "fake_idle: could not connect: {}", err);
+                        continue;
+                    }
+                    if self.config.read().await.can_idle {
+                        // we only fake-idled because network was gone during IDLE, probably
+                        break;
+                    }
+                    info!(context, "fake_idle is connected");
+                    // we are connected, let's see if fetching messages results
+                    // in anything.  If so, we behave as if IDLE had data but
+                    // will have already fetched the messages so perform_*_fetch
+                    // will not find any new.
+
+                    if let Some(ref watch_folder) = watch_folder {
+                        match self.fetch_from_single_folder(context, watch_folder).await {
+                            Ok(res) => {
+                                info!(context, "fetch_from_single_folder returned {:?}", res);
+                                if res {
+                                    break;
+                                }
+                            }
+                            Err(err) => {
+                                error!(context, "could not fetch from folder: {}", err);
+                                self.trigger_reconnect()
+                            }
+                        }
+                    }
+                }
+            }
+            self.interrupt.lock().await.take();
+
+            info!(
+                context,
+                "IMAP-fake-IDLE done after {:.4}s",
+                SystemTime::now()
+                    .duration_since(fake_idle_start_time)
+                    .unwrap()
+                    .as_millis() as f64
+                    / 1000.,
+            );
+        })
+    }
+
+    pub fn interrupt_idle(&self, context: &Context) {
+        task::block_on(async move {
+            let mut interrupt: Option<stop_token::StopSource> = self.interrupt.lock().await.take();
+            if interrupt.is_none() {
+                // idle wait is not running, signal it needs to skip
+                self.skip_next_idle_wait.store(true, Ordering::SeqCst);
+
+                // meanwhile idle-wait may have produced the StopSource
+                interrupt = self.interrupt.lock().await.take();
+            }
+            // let's manually drop the StopSource
+            if interrupt.is_some() {
+                // the imap thread provided us a stop token but might
+                // not have entered idle_wait yet, give it some time
+                // for that to happen. XXX handle this without extra wait
+                // https://github.com/deltachat/deltachat-core-rust/issues/925
+                std::thread::sleep(Duration::from_millis(200));
+                info!(context, "low-level: dropping stop-source to interrupt idle");
+                std::mem::drop(interrupt)
+            }
+        });
+    }
+
    pub fn mv(
        &self,
        context: &Context,
@@ -875,15 +1175,15 @@ impl Imap {
            }
            match self.select_folder(context, Some(&folder)).await {
                Ok(()) => None,
-                Err(select_folder::Error::ConnectionLost) => {
+                Err(Error::ConnectionLost) => {
                    warn!(context, "Lost imap connection");
                    Some(ImapActionResult::RetryLater)
                }
-                Err(select_folder::Error::NoSession) => {
+                Err(Error::NoSession) => {
                    warn!(context, "no imap session");
                    Some(ImapActionResult::Failed)
                }
-                Err(select_folder::Error::BadFolderName(folder_name)) => {
+                Err(Error::BadFolderName(folder_name)) => {
                    warn!(context, "invalid folder name: {:?}", folder_name);
                    Some(ImapActionResult::Failed)
                }
@@ -1098,7 +1398,11 @@ impl Imap {
        })
    }

-    async fn list_folders(&self, session: &mut Session, context: &Context) -> Option<Vec<Name>> {
+    async fn list_folders<'a>(
+        &self,
+        session: &'a mut Session,
+        context: &Context,
+    ) -> Option<Vec<Name>> {
        // TODO: use xlist when available
        match session.list(Some(""), Some("*")).await {
            Ok(list) => {
@@ -1120,17 +1424,13 @@ impl Imap {
        task::block_on(async move {
            info!(context, "emptying folder {}", folder);

-            // we want to report all error to the user
-            // (no retry should be attempted)
            if folder.is_empty() {
                error!(context, "cannot perform empty, folder not set");
                return;
            }
-            if let Err(err) = self.setup_handle_if_needed(context).await {
-                error!(context, "could not setup imap connection: {:?}", err);
-                return;
-            }
            if let Err(err) = self.select_folder(context, Some(&folder)).await {
+                // we want to report all error to the user
+                // (no retry should be attempted)
                error!(
                    context,
                    "Could not select {} for expunging: {:?}", folder, err
@@ -1170,7 +1470,7 @@ fn get_folder_meaning_by_name(folder_name: &Name) -> FolderMeaning {
    let sent_names = vec!["sent", "sent objects", "gesendet"];
    let lower = folder_name.name().to_lowercase();

-    if sent_names.into_iter().any(|s| s == lower) {
+    if sent_names.into_iter().find(|s| *s == lower).is_some() {
        FolderMeaning::SentObjects
    } else {
        FolderMeaning::Unknown
@@ -1186,12 +1486,15 @@ fn get_folder_meaning(folder_name: &Name) -> FolderMeaning {
    let special_names = vec!["\\Spam", "\\Trash", "\\Drafts", "\\Junk"];

    for attr in folder_name.attributes() {
-        if let NameAttribute::Custom(ref label) = attr {
-            if special_names.iter().any(|s| *s == label) {
-                res = FolderMeaning::Other;
-            } else if label == "\\Sent" {
-                res = FolderMeaning::SentObjects
+        match attr {
+            NameAttribute::Custom(ref label) => {
+                if special_names.iter().find(|s| *s == label).is_some() {
+                    res = FolderMeaning::Other;
+                } else if label == "\\Sent" {
+                    res = FolderMeaning::SentObjects
+                }
            }
+            _ => {}
        }
    }

@@ -1228,18 +1531,6 @@ fn precheck_imf(context: &Context, rfc724_mid: &str, server_folder: &str, server
    }
 }

-fn parse_message_id(message_id: &[u8]) -> crate::error::Result<String> {
-    let value = std::str::from_utf8(message_id)?;
-    let addrs = mailparse::addrparse(value)
-        .map_err(|err| format_err!("failed to parse message id {:?}", err))?;
-
-    if let Some(info) = addrs.extract_single_info() {
-        return Ok(info.addr);
-    }
-
-    bail!("could not parse message_id: {}", value);
-}
-
 fn prefetch_get_message_id(prefetch_msg: &Fetch) -> Result<String> {
    if prefetch_msg.envelope().is_none() {
        return Err(Error::Other(
@@ -1252,22 +1543,5 @@ fn prefetch_get_message_id(prefetch_msg: &Fetch) -> Result<String> {
        return Err(Error::Other("prefetch: No message ID found".to_string()));
    }

-    parse_message_id(&message_id.unwrap()).map_err(Into::into)
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_parse_message_id() {
-        assert_eq!(
-            parse_message_id(b"Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org").unwrap(),
-            "Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org"
-        );
-        assert_eq!(
-            parse_message_id(b"<Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org>").unwrap(),
-            "Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org"
-        );
-    }
+    wrapmime::parse_message_id(&message_id.unwrap()).map_err(Into::into)
 }
--- a/src/imap/idle.rs
+++ b/src/imap/idle.rs
@@ -1,273 +0,0 @@
-use super::Imap;
-
-use async_imap::extensions::idle::IdleResponse;
-use async_std::prelude::*;
-use async_std::task;
-use std::sync::atomic::Ordering;
-use std::time::{Duration, SystemTime};
-
-use crate::context::Context;
-use crate::imap_client::*;
-
-use super::select_folder;
-
-type Result<T> = std::result::Result<T, Error>;
-
-#[derive(Debug, Fail)]
-pub enum Error {
-    #[fail(display = "IMAP IDLE protocol failed to init/complete")]
-    IdleProtocolFailed(#[cause] async_imap::error::Error),
-
-    #[fail(display = "IMAP IDLE protocol timed out")]
-    IdleTimeout(#[cause] async_std::future::TimeoutError),
-
-    #[fail(display = "IMAP server does not have IDLE capability")]
-    IdleAbilityMissing,
-
-    #[fail(display = "IMAP select folder error")]
-    SelectFolderError(#[cause] select_folder::Error),
-
-    #[fail(display = "IMAP error")]
-    ImapError(#[cause] async_imap::error::Error),
-
-    #[fail(display = "Setup handle error")]
-    SetupHandleError(#[cause] super::Error),
-}
-
-impl From<select_folder::Error> for Error {
-    fn from(err: select_folder::Error) -> Error {
-        Error::SelectFolderError(err)
-    }
-}
-
-impl Imap {
-    pub fn can_idle(&self) -> bool {
-        task::block_on(async move { self.config.read().await.can_idle })
-    }
-
-    pub fn idle(&self, context: &Context, watch_folder: Option<String>) -> Result<()> {
-        task::block_on(async move {
-            if !self.can_idle() {
-                return Err(Error::IdleAbilityMissing);
-            }
-
-            self.setup_handle_if_needed(context)
-                .await
-                .map_err(Error::SetupHandleError)?;
-
-            self.select_folder(context, watch_folder.clone()).await?;
-
-            let session = self.session.lock().await.take();
-            let timeout = Duration::from_secs(23 * 60);
-            if let Some(session) = session {
-                match session.idle() {
-                    // BEWARE: If you change the Secure branch you
-                    // typically also need to change the Insecure branch.
-                    IdleHandle::Secure(mut handle) => {
-                        if let Err(err) = handle.init().await {
-                            return Err(Error::IdleProtocolFailed(err));
-                        }
-
-                        let (idle_wait, interrupt) = handle.wait_with_timeout(timeout);
-                        *self.interrupt.lock().await = Some(interrupt);
-
-                        if self.skip_next_idle_wait.load(Ordering::SeqCst) {
-                            // interrupt_idle has happened before we
-                            // provided self.interrupt
-                            self.skip_next_idle_wait.store(false, Ordering::SeqCst);
-                            std::mem::drop(idle_wait);
-                            info!(context, "Idle wait was skipped");
-                        } else {
-                            info!(context, "Idle entering wait-on-remote state");
-                            match idle_wait.await {
-                                IdleResponse::NewData(_) => {
-                                    info!(context, "Idle has NewData");
-                                }
-                                // TODO: idle_wait does not distinguish manual interrupts
-                                // from Timeouts if we would know it's a Timeout we could bail
-                                // directly and reconnect .
-                                IdleResponse::Timeout => {
-                                    info!(context, "Idle-wait timeout or interruption");
-                                }
-                                IdleResponse::ManualInterrupt => {
-                                    info!(context, "Idle wait was interrupted");
-                                }
-                            }
-                        }
-                        // if we can't properly terminate the idle
-                        // protocol let's break the connection.
-                        let res =
-                            async_std::future::timeout(Duration::from_secs(15), handle.done())
-                                .await
-                                .map_err(|err| {
-                                    self.trigger_reconnect();
-                                    Error::IdleTimeout(err)
-                                })?;
-
-                        match res {
-                            Ok(session) => {
-                                *self.session.lock().await = Some(Session::Secure(session));
-                            }
-                            Err(err) => {
-                                // if we cannot terminate IDLE it probably
-                                // means that we waited long (with idle_wait)
-                                // but the network went away/changed
-                                self.trigger_reconnect();
-                                return Err(Error::IdleProtocolFailed(err));
-                            }
-                        }
-                    }
-                    IdleHandle::Insecure(mut handle) => {
-                        if let Err(err) = handle.init().await {
-                            return Err(Error::IdleProtocolFailed(err));
-                        }
-
-                        let (idle_wait, interrupt) = handle.wait_with_timeout(timeout);
-                        *self.interrupt.lock().await = Some(interrupt);
-
-                        if self.skip_next_idle_wait.load(Ordering::SeqCst) {
-                            // interrupt_idle has happened before we
-                            // provided self.interrupt
-                            self.skip_next_idle_wait.store(false, Ordering::SeqCst);
-                            std::mem::drop(idle_wait);
-                            info!(context, "Idle wait was skipped");
-                        } else {
-                            info!(context, "Idle entering wait-on-remote state");
-                            match idle_wait.await {
-                                IdleResponse::NewData(_) => {
-                                    info!(context, "Idle has NewData");
-                                }
-                                // TODO: idle_wait does not distinguish manual interrupts
-                                // from Timeouts if we would know it's a Timeout we could bail
-                                // directly and reconnect .
-                                IdleResponse::Timeout => {
-                                    info!(context, "Idle-wait timeout or interruption");
-                                }
-                                IdleResponse::ManualInterrupt => {
-                                    info!(context, "Idle wait was interrupted");
-                                }
-                            }
-                        }
-                        // if we can't properly terminate the idle
-                        // protocol let's break the connection.
-                        let res =
-                            async_std::future::timeout(Duration::from_secs(15), handle.done())
-                                .await
-                                .map_err(|err| {
-                                    self.trigger_reconnect();
-                                    Error::IdleTimeout(err)
-                                })?;
-
-                        match res {
-                            Ok(session) => {
-                                *self.session.lock().await = Some(Session::Insecure(session));
-                            }
-                            Err(err) => {
-                                // if we cannot terminate IDLE it probably
-                                // means that we waited long (with idle_wait)
-                                // but the network went away/changed
-                                self.trigger_reconnect();
-                                return Err(Error::IdleProtocolFailed(err));
-                            }
-                        }
-                    }
-                }
-            }
-
-            Ok(())
-        })
-    }
-
-    pub(crate) fn fake_idle(&self, context: &Context, watch_folder: Option<String>) {
-        // Idle using polling. This is also needed if we're not yet configured -
-        // in this case, we're waiting for a configure job (and an interrupt).
-        task::block_on(async move {
-            let fake_idle_start_time = SystemTime::now();
-
-            info!(context, "IMAP-fake-IDLEing...");
-
-            let interrupt = stop_token::StopSource::new();
-
-            // check every minute if there are new messages
-            // TODO: grow sleep durations / make them more flexible
-            let interval = async_std::stream::interval(Duration::from_secs(60));
-            let mut interrupt_interval = interrupt.stop_token().stop_stream(interval);
-            *self.interrupt.lock().await = Some(interrupt);
-            if self.skip_next_idle_wait.load(Ordering::SeqCst) {
-                // interrupt_idle has happened before we
-                // provided self.interrupt
-                self.skip_next_idle_wait.store(false, Ordering::SeqCst);
-                info!(context, "fake-idle wait was skipped");
-            } else {
-                // loop until we are interrupted or if we fetched something
-                while let Some(_) = interrupt_interval.next().await {
-                    // try to connect with proper login params
-                    // (setup_handle_if_needed might not know about them if we
-                    // never successfully connected)
-                    if let Err(err) = self.connect_configured(context) {
-                        warn!(context, "fake_idle: could not connect: {}", err);
-                        continue;
-                    }
-                    if self.config.read().await.can_idle {
-                        // we only fake-idled because network was gone during IDLE, probably
-                        break;
-                    }
-                    info!(context, "fake_idle is connected");
-                    // we are connected, let's see if fetching messages results
-                    // in anything.  If so, we behave as if IDLE had data but
-                    // will have already fetched the messages so perform_*_fetch
-                    // will not find any new.
-
-                    if let Some(ref watch_folder) = watch_folder {
-                        match self.fetch_new_messages(context, watch_folder).await {
-                            Ok(res) => {
-                                info!(context, "fetch_new_messages returned {:?}", res);
-                                if res {
-                                    break;
-                                }
-                            }
-                            Err(err) => {
-                                error!(context, "could not fetch from folder: {}", err);
-                                self.trigger_reconnect()
-                            }
-                        }
-                    }
-                }
-            }
-            self.interrupt.lock().await.take();
-
-            info!(
-                context,
-                "IMAP-fake-IDLE done after {:.4}s",
-                SystemTime::now()
-                    .duration_since(fake_idle_start_time)
-                    .unwrap_or_default()
-                    .as_millis() as f64
-                    / 1000.,
-            );
-        })
-    }
-
-    pub fn interrupt_idle(&self, context: &Context) {
-        task::block_on(async move {
-            let mut interrupt: Option<stop_token::StopSource> = self.interrupt.lock().await.take();
-            if interrupt.is_none() {
-                // idle wait is not running, signal it needs to skip
-                self.skip_next_idle_wait.store(true, Ordering::SeqCst);
-
-                // meanwhile idle-wait may have produced the StopSource
-                interrupt = self.interrupt.lock().await.take();
-            }
-            // let's manually drop the StopSource
-            if interrupt.is_some() {
-                // the imap thread provided us a stop token but might
-                // not have entered idle_wait yet, give it some time
-                // for that to happen. XXX handle this without extra wait
-                // https://github.com/deltachat/deltachat-core-rust/issues/925
-                std::thread::sleep(Duration::from_millis(200));
-                info!(context, "low-level: dropping stop-source to interrupt idle");
-                std::mem::drop(interrupt)
-            }
-        });
-    }
-}
--- a/src/imap/select_folder.rs
+++ b/src/imap/select_folder.rs
@@ -1,113 +0,0 @@
-use super::Imap;
-
-use crate::context::Context;
-
-type Result<T> = std::result::Result<T, Error>;
-
-#[derive(Debug, Fail)]
-pub enum Error {
-    #[fail(display = "IMAP Could not obtain imap-session object.")]
-    NoSession,
-
-    #[fail(display = "IMAP Connection Lost or no connection established")]
-    ConnectionLost,
-
-    #[fail(display = "IMAP Folder name invalid: {:?}", _0)]
-    BadFolderName(String),
-
-    #[fail(display = "IMAP close/expunge failed: {}", _0)]
-    CloseExpungeFailed(#[cause] async_imap::error::Error),
-
-    #[fail(display = "IMAP other error: {:?}", _0)]
-    Other(String),
-}
-
-impl Imap {
-    /// select a folder, possibly update uid_validity and, if needed,
-    /// expunge the folder to remove delete-marked messages.
-    pub(super) async fn select_folder<S: AsRef<str>>(
-        &self,
-        context: &Context,
-        folder: Option<S>,
-    ) -> Result<()> {
-        if self.session.lock().await.is_none() {
-            let mut cfg = self.config.write().await;
-            cfg.selected_folder = None;
-            cfg.selected_folder_needs_expunge = false;
-            self.trigger_reconnect();
-            return Err(Error::NoSession);
-        }
-
-        // if there is a new folder and the new folder is equal to the selected one, there's nothing to do.
-        // if there is _no_ new folder, we continue as we might want to expunge below.
-        if let Some(ref folder) = folder {
-            if let Some(ref selected_folder) = self.config.read().await.selected_folder {
-                if folder.as_ref() == selected_folder {
-                    return Ok(());
-                }
-            }
-        }
-
-        // deselect existing folder, if needed (it's also done implicitly by SELECT, however, without EXPUNGE then)
-        let needs_expunge = { self.config.read().await.selected_folder_needs_expunge };
-        if needs_expunge {
-            if let Some(ref folder) = self.config.read().await.selected_folder {
-                info!(context, "Expunge messages in \"{}\".", folder);
-
-                // A CLOSE-SELECT is considerably faster than an EXPUNGE-SELECT, see
-                // https://tools.ietf.org/html/rfc3501#section-6.4.2
-                if let Some(ref mut session) = &mut *self.session.lock().await {
-                    match session.close().await {
-                        Ok(_) => {
-                            info!(context, "close/expunge succeeded");
-                        }
-                        Err(err) => {
-                            self.trigger_reconnect();
-                            return Err(Error::CloseExpungeFailed(err));
-                        }
-                    }
-                } else {
-                    return Err(Error::NoSession);
-                }
-            }
-            self.config.write().await.selected_folder_needs_expunge = false;
-        }
-
-        // select new folder
-        if let Some(ref folder) = folder {
-            if let Some(ref mut session) = &mut *self.session.lock().await {
-                let res = session.select(folder).await;
-
-                // https://tools.ietf.org/html/rfc3501#section-6.3.1
-                // says that if the server reports select failure we are in
-                // authenticated (not-select) state.
-
-                match res {
-                    Ok(mailbox) => {
-                        let mut config = self.config.write().await;
-                        config.selected_folder = Some(folder.as_ref().to_string());
-                        config.selected_mailbox = Some(mailbox);
-                        Ok(())
-                    }
-                    Err(async_imap::error::Error::ConnectionLost) => {
-                        self.trigger_reconnect();
-                        self.config.write().await.selected_folder = None;
-                        Err(Error::ConnectionLost)
-                    }
-                    Err(async_imap::error::Error::Validate(_)) => {
-                        Err(Error::BadFolderName(folder.as_ref().to_string()))
-                    }
-                    Err(err) => {
-                        self.config.write().await.selected_folder = None;
-                        self.trigger_reconnect();
-                        Err(Error::Other(err.to_string()))
-                    }
-                }
-            } else {
-                Err(Error::NoSession)
-            }
-        } else {
-            Ok(())
-        }
-    }
-}
--- a/src/imap_client.rs
+++ b/src/imap_client.rs
@@ -4,11 +4,14 @@ use async_imap::{
    types::{Capabilities, Fetch, Mailbox, Name},
    Client as ImapClient, Session as ImapSession,
 };
-use async_native_tls::TlsStream;
 use async_std::net::{self, TcpStream};
 use async_std::prelude::*;
+use async_std::sync::Arc;
+use async_tls::client::TlsStream;

-use crate::login_param::{dc_build_tls, CertificateChecks};
+use crate::login_param::{dc_build_tls_config, CertificateChecks};
+
+const DCC_IMAP_DEBUG: &str = "DCC_IMAP_DEBUG";

 #[derive(Debug)]
 pub(crate) enum Client {
@@ -35,18 +38,18 @@ impl Client {
        certificate_checks: CertificateChecks,
    ) -> ImapResult<Self> {
        let stream = TcpStream::connect(addr).await?;
-        let tls = dc_build_tls(certificate_checks)?;
-        let tls_connector: async_native_tls::TlsConnector = tls.into();
-        let tls_stream = tls_connector.connect(domain.as_ref(), stream).await?;
+        let tls_config = dc_build_tls_config(certificate_checks);
+        let tls_connector: async_tls::TlsConnector = Arc::new(tls_config).into();
+        let tls_stream = tls_connector.connect(domain.as_ref(), stream)?.await?;
        let mut client = ImapClient::new(tls_stream);
-        if std::env::var(crate::DCC_IMAP_DEBUG).is_ok() {
+        if std::env::var(DCC_IMAP_DEBUG).is_ok() {
            client.debug = true;
        }

        let _greeting = client
            .read_response()
            .await
-            .ok_or_else(|| ImapError::Bad("failed to read greeting".to_string()))?;
+            .expect("failed to read greeting");

        Ok(Client::Secure(client))
    }
@@ -55,13 +58,13 @@ impl Client {
        let stream = TcpStream::connect(addr).await?;

        let mut client = ImapClient::new(stream);
-        if std::env::var(crate::DCC_IMAP_DEBUG).is_ok() {
+        if std::env::var(DCC_IMAP_DEBUG).is_ok() {
            client.debug = true;
        }
        let _greeting = client
            .read_response()
            .await
-            .ok_or_else(|| ImapError::Bad("failed to read greeting".to_string()))?;
+            .expect("failed to read greeting");

        Ok(Client::Insecure(client))
    }
@@ -73,10 +76,10 @@ impl Client {
    ) -> ImapResult<Client> {
        match self {
            Client::Insecure(client) => {
-                let tls = dc_build_tls(certificate_checks)?;
-                let tls_stream = tls.into();
+                let tls_config = dc_build_tls_config(certificate_checks);
+                let tls: async_tls::TlsConnector = Arc::new(tls_config).into();

-                let client_sec = client.secure(domain, &tls_stream).await?;
+                let client_sec = client.secure(domain, &tls).await?;

                Ok(Client::Secure(client_sec))
            }
--- a/src/imex.rs
+++ b/src/imex.rs
@@ -8,7 +8,6 @@ use rand::{thread_rng, Rng};

 use crate::blob::BlobObject;
 use crate::chat;
-use crate::chat::delete_and_reset_all_device_msgs;
 use crate::config::Config;
 use crate::configure::*;
 use crate::constants::*;
@@ -34,19 +33,16 @@ pub enum ImexMode {
    /// and `private-key-default.asc`, if there are more keys, they are written to files as
    /// `public-key-<id>.asc` and `private-key-<id>.asc`
    ExportSelfKeys = 1,
-
    /// Import private keys found in the directory given as `param1`.
    /// The last imported key is made the default keys unless its name contains the string `legacy`.
    /// Public keys are not imported.
    ImportSelfKeys = 2,
-
    /// Export a backup to the directory given as `param1`.
    /// The backup contains all contacts, chats, images and other data and device independent settings.
    /// The backup does not contain device dependent settings as ringtones or LED notification settings.
    /// The name of the backup is typically `delta-chat.<day>.bak`, if more than one backup is create on a day,
    /// the format is `delta-chat.<day>-<number>.bak`
    ExportBackup = 11,
-
    /// `param1` is the file (not: directory) to import. The file is normally
    /// created by DC_IMEX_EXPORT_BACKUP and detected by dc_imex_has_backup(). Importing a backup
    /// is only possible as long as the context is not configured or used in another way.
@@ -57,7 +53,7 @@ pub enum ImexMode {
 /// For this purpose, the function creates a job that is executed in the IMAP-thread then;
 /// this requires to call dc_perform_inbox_jobs() regularly.
 ///
-/// What to do is defined by the *what* parameter.
+/// What to do is defined by the _what_ parameter.
 ///
 /// While dc_imex() returns immediately, the started job may take a while,
 /// you can stop it using dc_stop_ongoing_process(). During execution of the job,
@@ -88,24 +84,27 @@ pub fn has_backup(context: &Context, dir_name: impl AsRef<Path>) -> Result<Strin
    let mut newest_backup_time = 0;
    let mut newest_backup_path: Option<std::path::PathBuf> = None;
    for dirent in dir_iter {
-        if let Ok(dirent) = dirent {
-            let path = dirent.path();
-            let name = dirent.file_name();
-            let name = name.to_string_lossy();
-            if name.starts_with("delta-chat") && name.ends_with(".bak") {
-                let sql = Sql::new();
-                if sql.open(context, &path, true) {
-                    let curr_backup_time = sql
-                        .get_raw_config_int(context, "backup_time")
-                        .unwrap_or_default();
-                    if curr_backup_time > newest_backup_time {
-                        newest_backup_path = Some(path);
-                        newest_backup_time = curr_backup_time;
+        match dirent {
+            Ok(dirent) => {
+                let path = dirent.path();
+                let name = dirent.file_name();
+                let name = name.to_string_lossy();
+                if name.starts_with("delta-chat") && name.ends_with(".bak") {
+                    let sql = Sql::new();
+                    if sql.open(context, &path, true) {
+                        let curr_backup_time = sql
+                            .get_raw_config_int(context, "backup_time")
+                            .unwrap_or_default();
+                        if curr_backup_time > newest_backup_time {
+                            newest_backup_path = Some(path);
+                            newest_backup_time = curr_backup_time;
+                        }
+                        info!(context, "backup_time of {} is {}", name, curr_backup_time);
+                        sql.close(&context);
                    }
-                    info!(context, "backup_time of {} is {}", name, curr_backup_time);
-                    sql.close(&context);
                }
            }
+            Err(_) => (),
        }
    }
    match newest_backup_path {
@@ -137,16 +136,14 @@ fn do_initiate_key_transfer(context: &Context) -> Result<String> {

    let chat_id = chat::create_by_contact_id(context, DC_CONTACT_ID_SELF)?;
    msg = Message::default();
-    msg.viewtype = Viewtype::File;
+    msg.type_0 = Viewtype::File;
    msg.param.set(Param::File, setup_file_blob.as_name());

    msg.param
        .set(Param::MimeType, "application/autocrypt-setup");
    msg.param.set_cmd(SystemMessage::AutocryptSetupMessage);
-    msg.param.set_int(
-        Param::ForcePlaintext,
-        ForcePlaintext::NoAutocryptHeader as i32,
-    );
+    msg.param
+        .set_int(Param::ForcePlaintext, DC_FP_NO_AUTOCRYPT_HEADER);

    ensure!(!context.shall_stop_ongoing(), "canceled");
    let msg_id = chat::send_msg(context, chat_id, &mut msg)?;
@@ -178,7 +175,7 @@ pub fn render_setup_file(context: &Context, passphrase: &str) -> Result<String>
    );
    let self_addr = e2ee::ensure_secret_key_exists(context)?;
    let private_key = Key::from_self_private(context, self_addr, &context.sql)
-        .ok_or_else(|| format_err!("Failed to get private key."))?;
+        .ok_or(format_err!("Failed to get private key."))?;
    let ac_headers = match context.get_config_bool(Config::E2eeEnabled) {
        false => None,
        true => Some(("Autocrypt-Prefer-Encrypt", "mutual")),
@@ -225,7 +222,7 @@ pub fn create_setup_code(_context: &Context) -> String {
    for i in 0..9 {
        loop {
            random_val = rng.gen();
-            if random_val as usize <= 60000 {
+            if !(random_val as usize > 60000) {
                break;
            }
        }
@@ -386,7 +383,7 @@ pub fn JobImexImap(context: &Context, job: &Job) -> Result<()> {
            context.free_ongoing();
            bail!("Cannot create private key or private key not available.");
        } else {
-            dc_create_folder(context, &param)?;
+            dc_create_folder(context, &param);
        }
    }
    let path = Path::new(param);
@@ -444,8 +441,6 @@ fn import_backup(context: &Context, backup_to_import: impl AsRef<Path>) -> Resul
        "could not re-open db"
    );

-    delete_and_reset_all_device_msgs(&context)?;
-
    let total_files_cnt = context
        .sql
        .query_get_value::<_, isize>(context, "SELECT COUNT(*) FROM backup_blobs;", params![])
@@ -553,7 +548,7 @@ fn export_backup(context: &Context, dir: impl AsRef<Path>) -> Result<()> {
        }
        Ok(()) => {
            dest_sql.set_raw_config_int(context, "backup_time", now as i32)?;
-            context.call_cb(Event::ImexFileWritten(dest_path_filename));
+            context.call_cb(Event::ImexFileWritten(dest_path_filename.clone()));
            Ok(())
        }
    };
--- a/src/job.rs
+++ b/src/job.rs
@@ -1,15 +1,8 @@
-//! # Job module
-//!
-//! This module implements a job queue maintained in the SQLite database
-//! and job types.
-
-use std::{fmt, time};
+use std::time::Duration;

 use deltachat_derive::{FromSql, ToSql};
 use rand::{thread_rng, Rng};

-use async_std::task;
-
 use crate::blob::BlobObject;
 use crate::chat;
 use crate::config::Config;
@@ -17,7 +10,7 @@ use crate::configure::*;
 use crate::constants::*;
 use crate::context::{Context, PerformJobsNeeded};
 use crate::dc_tools::*;
-use crate::error::{Error, Result};
+use crate::error::Error;
 use crate::events::Event;
 use crate::imap::*;
 use crate::imex::*;
@@ -41,27 +34,11 @@ enum Thread {
    Smtp = 5000,
 }

-/// Job try result.
-#[derive(Debug, Display)]
-pub enum Status {
-    Finished(std::result::Result<(), Error>),
-    RetryNow,
-    RetryLater,
-}
-
-#[macro_export]
-macro_rules! job_try {
-    ($expr:expr) => {
-        match $expr {
-            ::std::result::Result::Ok(val) => val,
-            ::std::result::Result::Err(err) => {
-                return $crate::job::Status::Finished(Err(err.into()));
-            }
-        }
-    };
-    ($expr:expr,) => {
-        $crate::job_try!($expr)
-    };
+#[derive(Debug, Display, Copy, Clone, PartialEq, Eq, FromPrimitive, ToPrimitive)]
+enum TryAgain {
+    Dont,
+    AtOnce,
+    StandardDelay,
 }

 impl Default for Thread {
@@ -135,17 +112,11 @@ pub struct Job {
    pub added_timestamp: i64,
    pub tries: u32,
    pub param: Params,
+    try_again: TryAgain,
    pub pending_error: Option<String>,
 }

-impl fmt::Display for Job {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "#{}, action {}", self.job_id, self.action)
-    }
-}
-
 impl Job {
-    /// Deletes the job from the database.
    fn delete(&self, context: &Context) -> bool {
        context
            .sql
@@ -153,9 +124,6 @@ impl Job {
            .is_ok()
    }

-    /// Updates the job already stored in the database.
-    ///
-    /// To add a new job, use [job_add].
    fn update(&self, context: &Context) -> bool {
        sql::execute(
            context,
@@ -172,164 +140,161 @@ impl Job {
    }

    #[allow(non_snake_case)]
-    fn SendMsgToSmtp(&mut self, context: &Context) -> Status {
+    fn SendMsgToSmtp(&mut self, context: &Context) {
        /* connect to SMTP server, if not yet done */
        if !context.smtp.lock().unwrap().is_connected() {
            let loginparam = LoginParam::from_database(context, "configured_");
-            if let Err(err) = context.smtp.lock().unwrap().connect(context, &loginparam) {
-                warn!(context, "SMTP connection failure: {:?}", err);
-                return Status::RetryLater;
+            let connected = context.smtp.lock().unwrap().connect(context, &loginparam);
+            if connected.is_err() {
+                self.try_again_later(TryAgain::StandardDelay, None);
+                return;
            }
        }

-        let filename = job_try!(job_try!(self
-            .param
-            .get_path(Param::File, context)
-            .map_err(|_| format_err!("Can't get filename")))
-        .ok_or_else(|| format_err!("Can't get filename")));
-        let body = job_try!(dc_read_file(context, &filename));
-        let recipients = job_try!(self.param.get(Param::Recipients).ok_or_else(|| {
-            warn!(context, "Missing recipients for job {}", self.job_id);
-            format_err!("Missing recipients")
-        }));
+        if let Some(filename) = self.param.get_path(Param::File, context).unwrap_or(None) {
+            if let Ok(body) = dc_read_file(context, &filename) {
+                if let Some(recipients) = self.param.get(Param::Recipients) {
+                    let recipients_list = recipients
+                        .split('\x1e')
+                        .filter_map(|addr| match lettre::EmailAddress::new(addr.to_string()) {
+                            Ok(addr) => Some(addr),
+                            Err(err) => {
+                                warn!(context, "invalid recipient: {} {:?}", addr, err);
+                                None
+                            }
+                        })
+                        .collect::<Vec<_>>();

-        let recipients_list = recipients
-            .split('\x1e')
-            .filter_map(
-                |addr| match async_smtp::EmailAddress::new(addr.to_string()) {
-                    Ok(addr) => Some(addr),
-                    Err(err) => {
-                        warn!(context, "invalid recipient: {} {:?}", addr, err);
-                        None
+                    /* if there is a msg-id and it does not exist in the db, cancel sending.
+                    this happends if dc_delete_msgs() was called
+                    before the generated mime was sent out */
+                    if 0 != self.foreign_id
+                        && !message::exists(context, MsgId::new(self.foreign_id))
+                    {
+                        warn!(
+                            context,
+                            "Not sending Message {} as it was deleted", self.foreign_id
+                        );
+                        return;
+                    };
+
+                    // hold the smtp lock during sending of a job and
+                    // its ok/error response processing. Note that if a message
+                    // was sent we need to mark it in the database ASAP as we
+                    // otherwise might send it twice.
+                    let mut smtp = context.smtp.lock().unwrap();
+                    match smtp.send(context, recipients_list, body, self.job_id) {
+                        Err(crate::smtp::send::Error::SendError(err)) => {
+                            // Remote error, retry later.
+                            smtp.disconnect();
+                            info!(context, "SMTP failed to send: {}", err);
+                            self.try_again_later(TryAgain::AtOnce, Some(err.to_string()));
+                        }
+                        Err(crate::smtp::send::Error::EnvelopeError(err)) => {
+                            // Local error, job is invalid, do not retry.
+                            smtp.disconnect();
+                            warn!(context, "SMTP job is invalid: {}", err);
+                        }
+                        Err(crate::smtp::send::Error::NoTransport) => {
+                            // Should never happen.
+                            // It does not even make sense to disconnect here.
+                            error!(context, "SMTP job failed because SMTP has no transport");
+                        }
+                        Ok(()) => {
+                            // smtp success, update db ASAP, then delete smtp file
+                            if 0 != self.foreign_id {
+                                set_delivered(context, MsgId::new(self.foreign_id));
+                            }
+                            // now also delete the generated file
+                            dc_delete_file(context, filename);
+                        }
                    }
-                },
-            )
-            .collect::<Vec<_>>();
-
-        /* if there is a msg-id and it does not exist in the db, cancel sending.
-        this happends if dc_delete_msgs() was called
-        before the generated mime was sent out */
-        if 0 != self.foreign_id && !message::exists(context, MsgId::new(self.foreign_id)) {
-            return Status::Finished(Err(format_err!(
-                "Not sending Message {} as it was deleted",
-                self.foreign_id
-            )));
-        };
-
-        // hold the smtp lock during sending of a job and
-        // its ok/error response processing. Note that if a message
-        // was sent we need to mark it in the database ASAP as we
-        // otherwise might send it twice.
-        let mut smtp = context.smtp.lock().unwrap();
-        if std::env::var(crate::DCC_MIME_DEBUG).is_ok() {
-            info!(context, "smtp-sending out mime message:");
-            println!("{}", String::from_utf8_lossy(&body));
-        }
-        match task::block_on(smtp.send(context, recipients_list, body, self.job_id)) {
-            Err(crate::smtp::send::Error::SendError(err)) => {
-                // Remote error, retry later.
-                warn!(context, "SMTP failed to send: {}", err);
-                smtp.disconnect();
-                self.pending_error = Some(err.to_string());
-                Status::RetryLater
-            }
-            Err(crate::smtp::send::Error::EnvelopeError(err)) => {
-                // Local error, job is invalid, do not retry.
-                smtp.disconnect();
-                warn!(context, "SMTP job is invalid: {}", err);
-                Status::Finished(Err(Error::SmtpError(err)))
-            }
-            Err(crate::smtp::send::Error::NoTransport) => {
-                // Should never happen.
-                // It does not even make sense to disconnect here.
-                error!(context, "SMTP job failed because SMTP has no transport");
-                Status::Finished(Err(format_err!("SMTP has not transport")))
-            }
-            Ok(()) => {
-                // smtp success, update db ASAP, then delete smtp file
-                if 0 != self.foreign_id {
-                    set_delivered(context, MsgId::new(self.foreign_id));
+                } else {
+                    warn!(context, "Missing recipients for job {}", self.job_id,);
                }
-                // now also delete the generated file
-                dc_delete_file(context, filename);
-                Status::Finished(Ok(()))
            }
        }
    }

-    #[allow(non_snake_case)]
-    fn MoveMsg(&mut self, context: &Context) -> Status {
-        let imap_inbox = &context.inbox_thread.read().unwrap().imap;
-
-        let msg = job_try!(Message::load_from_db(context, MsgId::new(self.foreign_id)));
-
-        if let Err(err) = imap_inbox.ensure_configured_folders(context, true) {
-            warn!(context, "could not configure folders: {:?}", err);
-            return Status::RetryLater;
-        }
-        let dest_folder = context
-            .sql
-            .get_raw_config(context, "configured_mvbox_folder");
-
-        if let Some(dest_folder) = dest_folder {
-            let server_folder = msg.server_folder.as_ref().unwrap();
-            let mut dest_uid = 0;
-
-            match imap_inbox.mv(
-                context,
-                server_folder,
-                msg.server_uid,
-                &dest_folder,
-                &mut dest_uid,
-            ) {
-                ImapActionResult::RetryLater => Status::RetryLater,
-                ImapActionResult::Success => {
-                    message::update_server_uid(context, &msg.rfc724_mid, &dest_folder, dest_uid);
-                    Status::Finished(Ok(()))
-                }
-                ImapActionResult::Failed => {
-                    Status::Finished(Err(format_err!("IMAP action failed")))
-                }
-                ImapActionResult::AlreadyDone => Status::Finished(Ok(())),
-            }
-        } else {
-            Status::Finished(Err(format_err!("No mvbox folder configured")))
-        }
+    // this value does not increase the number of tries
+    fn try_again_later(&mut self, try_again: TryAgain, pending_error: Option<String>) {
+        self.try_again = try_again;
+        self.pending_error = pending_error;
    }

    #[allow(non_snake_case)]
-    fn DeleteMsgOnImap(&mut self, context: &Context) -> Status {
+    fn MoveMsg(&mut self, context: &Context) {
        let imap_inbox = &context.inbox_thread.read().unwrap().imap;

-        let mut msg = job_try!(Message::load_from_db(context, MsgId::new(self.foreign_id)));
+        if let Ok(msg) = Message::load_from_db(context, MsgId::new(self.foreign_id)) {
+            if let Err(err) = imap_inbox.ensure_configured_folders(context, true) {
+                self.try_again_later(TryAgain::StandardDelay, None);
+                warn!(context, "could not configure folders: {:?}", err);
+                return;
+            }
+            let dest_folder = context
+                .sql
+                .get_raw_config(context, "configured_mvbox_folder");

-        if !msg.rfc724_mid.is_empty() {
-            if message::rfc724_mid_cnt(context, &msg.rfc724_mid) > 1 {
-                info!(
-                    context,
-                    "The message is deleted from the server when all parts are deleted.",
-                );
-            } else {
-                /* if this is the last existing part of the message,
-                we delete the message from the server */
-                let mid = msg.rfc724_mid;
+            if let Some(dest_folder) = dest_folder {
                let server_folder = msg.server_folder.as_ref().unwrap();
-                let res = imap_inbox.delete_msg(context, &mid, server_folder, &mut msg.server_uid);
-                if res == ImapActionResult::RetryLater {
-                    // XXX RetryLater is converted to RetryNow here
-                    return Status::RetryNow;
+                let mut dest_uid = 0;
+
+                match imap_inbox.mv(
+                    context,
+                    server_folder,
+                    msg.server_uid,
+                    &dest_folder,
+                    &mut dest_uid,
+                ) {
+                    ImapActionResult::RetryLater => {
+                        self.try_again_later(TryAgain::StandardDelay, None);
+                    }
+                    ImapActionResult::Success => {
+                        message::update_server_uid(
+                            context,
+                            &msg.rfc724_mid,
+                            &dest_folder,
+                            dest_uid,
+                        );
+                    }
+                    ImapActionResult::Failed | ImapActionResult::AlreadyDone => {}
                }
            }
-            Message::delete_from_db(context, msg.id);
-            Status::Finished(Ok(()))
-        } else {
-            /* eg. device messages have no Message-ID */
-            Status::Finished(Ok(()))
        }
    }

    #[allow(non_snake_case)]
-    fn EmptyServer(&mut self, context: &Context) -> Status {
+    fn DeleteMsgOnImap(&mut self, context: &Context) {
+        let imap_inbox = &context.inbox_thread.read().unwrap().imap;
+
+        if let Ok(mut msg) = Message::load_from_db(context, MsgId::new(self.foreign_id)) {
+            if !msg.rfc724_mid.is_empty() {
+                /* eg. device messages have no Message-ID */
+                if message::rfc724_mid_cnt(context, &msg.rfc724_mid) > 1 {
+                    info!(
+                        context,
+                        "The message is deleted from the server when all parts are deleted.",
+                    );
+                } else {
+                    /* if this is the last existing part of the message,
+                    we delete the message from the server */
+                    let mid = msg.rfc724_mid;
+                    let server_folder = msg.server_folder.as_ref().unwrap();
+                    let res =
+                        imap_inbox.delete_msg(context, &mid, server_folder, &mut msg.server_uid);
+                    if res == ImapActionResult::RetryLater {
+                        self.try_again_later(TryAgain::AtOnce, None);
+                        return;
+                    }
+                }
+                Message::delete_from_db(context, msg.id);
+            }
+        }
+    }
+
+    #[allow(non_snake_case)]
+    fn EmptyServer(&mut self, context: &Context) {
        let imap_inbox = &context.inbox_thread.read().unwrap().imap;
        if self.foreign_id & DC_EMPTY_MVBOX > 0 {
            if let Some(mvbox_folder) = context
@@ -342,39 +307,38 @@ impl Job {
        if self.foreign_id & DC_EMPTY_INBOX > 0 {
            imap_inbox.empty_folder(context, "INBOX");
        }
-        Status::Finished(Ok(()))
    }

    #[allow(non_snake_case)]
-    fn MarkseenMsgOnImap(&mut self, context: &Context) -> Status {
+    fn MarkseenMsgOnImap(&mut self, context: &Context) {
        let imap_inbox = &context.inbox_thread.read().unwrap().imap;

-        let msg = job_try!(Message::load_from_db(context, MsgId::new(self.foreign_id)));
-
-        let folder = msg.server_folder.as_ref().unwrap();
-        match imap_inbox.set_seen(context, folder, msg.server_uid) {
-            ImapActionResult::RetryLater => Status::RetryLater,
-            ImapActionResult::AlreadyDone => Status::Finished(Ok(())),
-            ImapActionResult::Success | ImapActionResult::Failed => {
-                // XXX the message might just have been moved
-                // we want to send out an MDN anyway
-                // The job will not be retried so locally
-                // there is no risk of double-sending MDNs.
-                if msg.param.get_bool(Param::WantsMdn).unwrap_or_default()
-                    && context.get_config_bool(Config::MdnsEnabled)
-                {
-                    if let Err(err) = send_mdn(context, msg.id) {
-                        warn!(context, "could not send out mdn for {}: {}", msg.id, err);
-                        return Status::Finished(Err(err));
+        if let Ok(msg) = Message::load_from_db(context, MsgId::new(self.foreign_id)) {
+            let folder = msg.server_folder.as_ref().unwrap();
+            match imap_inbox.set_seen(context, folder, msg.server_uid) {
+                ImapActionResult::RetryLater => {
+                    self.try_again_later(TryAgain::StandardDelay, None);
+                }
+                ImapActionResult::AlreadyDone => {}
+                ImapActionResult::Success | ImapActionResult::Failed => {
+                    // XXX the message might just have been moved
+                    // we want to send out an MDN anyway
+                    // The job will not be retried so locally
+                    // there is no risk of double-sending MDNs.
+                    if 0 != msg.param.get_int(Param::WantsMdn).unwrap_or_default()
+                        && context.get_config_bool(Config::MdnsEnabled)
+                    {
+                        if let Err(err) = send_mdn(context, msg.id) {
+                            warn!(context, "could not send out mdn for {}: {}", msg.id, err);
+                        }
                    }
                }
-                Status::Finished(Ok(()))
            }
        }
    }

    #[allow(non_snake_case)]
-    fn MarkseenMdnOnImap(&mut self, context: &Context) -> Status {
+    fn MarkseenMdnOnImap(&mut self, context: &Context) {
        let folder = self
            .param
            .get(Param::ServerFolder)
@@ -383,12 +347,14 @@ impl Job {
        let uid = self.param.get_int(Param::ServerUid).unwrap_or_default() as u32;
        let imap_inbox = &context.inbox_thread.read().unwrap().imap;
        if imap_inbox.set_seen(context, &folder, uid) == ImapActionResult::RetryLater {
-            return Status::RetryLater;
+            self.try_again_later(TryAgain::StandardDelay, None);
+            return;
        }
-        if self.param.get_bool(Param::AlsoMove).unwrap_or_default() {
+        if 0 != self.param.get_int(Param::AlsoMove).unwrap_or_default() {
            if let Err(err) = imap_inbox.ensure_configured_folders(context, true) {
+                self.try_again_later(TryAgain::StandardDelay, None);
                warn!(context, "configuring folders failed: {:?}", err);
-                return Status::RetryLater;
+                return;
            }
            let dest_folder = context
                .sql
@@ -398,15 +364,9 @@ impl Job {
                if ImapActionResult::RetryLater
                    == imap_inbox.mv(context, &folder, uid, &dest_folder, &mut dest_uid)
                {
-                    Status::RetryLater
-                } else {
-                    Status::Finished(Ok(()))
+                    self.try_again_later(TryAgain::StandardDelay, None);
                }
-            } else {
-                Status::Finished(Err(format_err!("MVBOX is not configured")))
            }
-        } else {
-            Status::Finished(Ok(()))
        }
    }
 }
@@ -425,37 +385,31 @@ pub fn job_kill_action(context: &Context, action: Action) -> bool {
 pub fn perform_inbox_fetch(context: &Context) {
    let use_network = context.get_config_bool(Config::InboxWatch);

-    task::block_on(
-        context
-            .inbox_thread
-            .write()
-            .unwrap()
-            .fetch(context, use_network),
-    );
+    context
+        .inbox_thread
+        .write()
+        .unwrap()
+        .fetch(context, use_network);
 }

 pub fn perform_mvbox_fetch(context: &Context) {
    let use_network = context.get_config_bool(Config::MvboxWatch);

-    task::block_on(
-        context
-            .mvbox_thread
-            .write()
-            .unwrap()
-            .fetch(context, use_network),
-    );
+    context
+        .mvbox_thread
+        .write()
+        .unwrap()
+        .fetch(context, use_network);
 }

 pub fn perform_sentbox_fetch(context: &Context) {
    let use_network = context.get_config_bool(Config::SentboxWatch);

-    task::block_on(
-        context
-            .sentbox_thread
-            .write()
-            .unwrap()
-            .fetch(context, use_network),
-    );
+    context
+        .sentbox_thread
+        .write()
+        .unwrap()
+        .fetch(context, use_network);
 }

 pub fn perform_inbox_idle(context: &Context) {
@@ -495,19 +449,19 @@ pub fn perform_sentbox_idle(context: &Context) {
        .idle(context, use_network);
 }

-pub fn interrupt_inbox_idle(context: &Context) {
-    info!(context, "interrupt_inbox_idle called");
-    // we do not block on trying to obtain the thread lock
-    // because we don't know in which state the thread is.
-    // If it's currently fetching then we can not get the lock
-    // but we flag it for checking jobs so that idle will be skipped.
-    match context.inbox_thread.try_read() {
-        Ok(inbox_thread) => {
-            inbox_thread.interrupt_idle(context);
-        }
-        Err(err) => {
-            *context.perform_inbox_jobs_needed.write().unwrap() = true;
-            warn!(context, "could not interrupt idle: {}", err);
+pub fn interrupt_inbox_idle(context: &Context, block: bool) {
+    info!(context, "interrupt_inbox_idle called blocking={}", block);
+    if block {
+        context.inbox_thread.read().unwrap().interrupt_idle(context);
+    } else {
+        match context.inbox_thread.try_read() {
+            Ok(inbox_thread) => {
+                inbox_thread.interrupt_idle(context);
+            }
+            Err(err) => {
+                *context.perform_inbox_jobs_needed.write().unwrap() = true;
+                warn!(context, "could not interrupt idle: {}", err);
+            }
        }
    }
 }
@@ -586,7 +540,7 @@ pub fn perform_smtp_idle(context: &Context) {
    info!(context, "SMTP-idle ended.",);
 }

-fn get_next_wakeup_time(context: &Context, thread: Thread) -> time::Duration {
+fn get_next_wakeup_time(context: &Context, thread: Thread) -> Duration {
    let t: i64 = context
        .sql
        .query_get_value(
@@ -596,13 +550,13 @@ fn get_next_wakeup_time(context: &Context, thread: Thread) -> time::Duration {
        )
        .unwrap_or_default();

-    let mut wakeup_time = time::Duration::new(10 * 60, 0);
+    let mut wakeup_time = Duration::new(10 * 60, 0);
    let now = time();
    if t > 0 {
        if t > now {
-            wakeup_time = time::Duration::new((t - now) as u64, 0);
+            wakeup_time = Duration::new((t - now) as u64, 0);
        } else {
-            wakeup_time = time::Duration::new(0, 0);
+            wakeup_time = Duration::new(0, 0);
        }
    }

@@ -619,7 +573,7 @@ pub fn maybe_network(context: &Context) {
    }

    interrupt_smtp_idle(context);
-    interrupt_inbox_idle(context);
+    interrupt_inbox_idle(context, true);
    interrupt_mvbox_idle(context);
    interrupt_sentbox_idle(context);
 }
@@ -643,33 +597,26 @@ fn set_delivered(context: &Context, msg_id: MsgId) {
        .unwrap_or_default();
    context.call_cb(Event::MsgDelivered {
        chat_id: chat_id as u32,
-        msg_id,
+        msg_id: msg_id,
    });
 }

 /* special case for DC_JOB_SEND_MSG_TO_SMTP */
-pub fn job_send_msg(context: &Context, msg_id: MsgId) -> Result<()> {
+#[allow(non_snake_case)]
+pub fn job_send_msg(context: &Context, msg_id: MsgId) -> Result<(), Error> {
    let mut msg = Message::load_from_db(context, msg_id)?;
    msg.try_calc_and_set_dimensions(context).ok();

    /* create message */
-    let needs_encryption = msg.param.get_bool(Param::GuaranteeE2ee).unwrap_or_default();
+    let needs_encryption = msg.param.get_int(Param::GuaranteeE2ee).unwrap_or_default();

-    let attach_selfavatar = match chat::shall_attach_selfavatar(context, msg.chat_id) {
-        Ok(attach_selfavatar) => attach_selfavatar,
-        Err(err) => {
-            warn!(context, "job: cannot get selfavatar-state: {}", err);
-            false
-        }
-    };
-
-    let mimefactory = MimeFactory::from_msg(context, &msg, attach_selfavatar)?;
+    let mimefactory = MimeFactory::from_msg(context, &msg)?;
    let mut rendered_msg = mimefactory.render().map_err(|err| {
        message::set_msg_failed(context, msg_id, Some(err.to_string()));
        err
    })?;

-    if needs_encryption && !rendered_msg.is_encrypted {
+    if 0 != needs_encryption && !rendered_msg.is_encrypted {
        /* unrecoverable */
        message::set_msg_failed(
            context,
@@ -700,9 +647,8 @@ pub fn job_send_msg(context: &Context, msg_id: MsgId) -> Result<()> {
    }

    if rendered_msg.is_gossiped {
-        chat::set_gossiped_timestamp(context, msg.chat_id, time())?;
+        chat::set_gossiped_timestamp(context, msg.chat_id, time());
    }
-
    if 0 != rendered_msg.last_added_location_id {
        if let Err(err) = location::set_kml_sent_timestamp(context, msg.chat_id, time()) {
            error!(context, "Failed to set kml sent_timestamp: {:?}", err);
@@ -715,14 +661,7 @@ pub fn job_send_msg(context: &Context, msg_id: MsgId) -> Result<()> {
            }
        }
    }
-
-    if attach_selfavatar {
-        if let Err(err) = chat::set_selfavatar_timestamp(context, msg.chat_id, time()) {
-            error!(context, "Failed to set selfavatar timestamp: {:?}", err);
-        }
-    }
-
-    if rendered_msg.is_encrypted && !needs_encryption {
+    if rendered_msg.is_encrypted && needs_encryption == 0 {
        msg.param.set_int(Param::GuaranteeE2ee, 1);
        msg.save_param_to_disk(context);
    }
@@ -755,7 +694,17 @@ fn job_perform(context: &Context, thread: Thread, probe_network: bool) {
    let jobs: Vec<Job> = load_jobs(context, thread, probe_network);

    for mut job in jobs {
-        info!(context, "{}-job {} started...", thread, job);
+        info!(
+            context,
+            "{}-job #{}, action {} started...",
+            if thread == Thread::Imap {
+                "INBOX"
+            } else {
+                "SMTP"
+            },
+            job.job_id,
+            job.action,
+        );

        // some configuration jobs are "exclusive":
        // - they are always executed in the imap-thread and the smtp-thread is suspended during execution
@@ -778,55 +727,40 @@ fn job_perform(context: &Context, thread: Thread, probe_network: bool) {
            suspend_smtp_thread(context, true);
        }

-        let try_res = (0..2)
-            .map(|tries| {
-                info!(
-                    context,
-                    "{} performs immediate try {} of job {}", thread, tries, job
-                );
+        for _tries in 0..2 {
+            // this can be modified by a job using dc_job_try_again_later()
+            job.try_again = TryAgain::Dont;

-                let try_res = match job.action {
-                    Action::Unknown => Status::Finished(Err(format_err!("Unknown job id found"))),
-                    Action::SendMsgToSmtp => job.SendMsgToSmtp(context),
-                    Action::EmptyServer => job.EmptyServer(context),
-                    Action::DeleteMsgOnImap => job.DeleteMsgOnImap(context),
-                    Action::MarkseenMsgOnImap => job.MarkseenMsgOnImap(context),
-                    Action::MarkseenMdnOnImap => job.MarkseenMdnOnImap(context),
-                    Action::MoveMsg => job.MoveMsg(context),
-                    Action::SendMdn => job.SendMsgToSmtp(context),
-                    Action::ConfigureImap => JobConfigureImap(context),
-                    Action::ImexImap => match JobImexImap(context, &job) {
-                        Ok(()) => Status::Finished(Ok(())),
-                        Err(err) => {
-                            error!(context, "{}", err);
-                            Status::Finished(Err(err))
-                        }
-                    },
-                    Action::MaybeSendLocations => location::JobMaybeSendLocations(context, &job),
-                    Action::MaybeSendLocationsEnded => {
-                        location::JobMaybeSendLocationsEnded(context, &mut job)
+            match job.action {
+                Action::Unknown => {
+                    info!(context, "Unknown job id found");
+                }
+                Action::SendMsgToSmtp => job.SendMsgToSmtp(context),
+                Action::EmptyServer => job.EmptyServer(context),
+                Action::DeleteMsgOnImap => job.DeleteMsgOnImap(context),
+                Action::MarkseenMsgOnImap => job.MarkseenMsgOnImap(context),
+                Action::MarkseenMdnOnImap => job.MarkseenMdnOnImap(context),
+                Action::MoveMsg => job.MoveMsg(context),
+                Action::SendMdn => job.SendMsgToSmtp(context),
+                Action::ConfigureImap => JobConfigureImap(context),
+                Action::ImexImap => match JobImexImap(context, &job) {
+                    Ok(()) => {}
+                    Err(err) => {
+                        error!(context, "{}", err);
                    }
-                    Action::Housekeeping => {
-                        sql::housekeeping(context);
-                        Status::Finished(Ok(()))
-                    }
-                    Action::SendMdnOld => Status::Finished(Ok(())),
-                    Action::SendMsgToSmtpOld => Status::Finished(Ok(())),
-                };
-
-                info!(
-                    context,
-                    "{} finished immediate try {} of job {}", thread, tries, job
-                );
-
-                try_res
-            })
-            .find(|try_res| match try_res {
-                Status::RetryNow => false,
-                _ => true,
-            })
-            .unwrap_or(Status::RetryNow);
-
+                },
+                Action::MaybeSendLocations => location::JobMaybeSendLocations(context, &job),
+                Action::MaybeSendLocationsEnded => {
+                    location::JobMaybeSendLocationsEnded(context, &mut job)
+                }
+                Action::Housekeeping => sql::housekeeping(context),
+                Action::SendMdnOld => {}
+                Action::SendMsgToSmtpOld => {}
+            }
+            if job.try_again != TryAgain::AtOnce {
+                break;
+            }
+        }
        if Action::ConfigureImap == job.action || Action::ImexImap == job.action {
            context
                .sentbox_thread
@@ -842,79 +776,54 @@ fn job_perform(context: &Context, thread: Thread, probe_network: bool) {
                .unsuspend(context);
            suspend_smtp_thread(context, false);
            break;
-        }
-
-        match try_res {
-            Status::RetryNow | Status::RetryLater => {
-                let tries = job.tries + 1;
-
-                if tries < JOB_RETRIES {
-                    info!(
-                        context,
-                        "{} thread increases job {} tries to {}", thread, job, tries
-                    );
-                    job.tries = tries;
-                    let time_offset = get_backoff_time_offset(tries);
-                    job.desired_timestamp = time() + time_offset;
-                    job.update(context);
-                    info!(
-                        context,
-                        "{}-job #{} not succeeded on try #{}, retry in {} seconds.",
-                        thread,
-                        job.job_id as u32,
-                        tries,
-                        time_offset
-                    );
-                    if thread == Thread::Smtp && tries < JOB_RETRIES - 1 {
-                        context
-                            .smtp_state
-                            .clone()
-                            .0
-                            .lock()
-                            .unwrap()
-                            .perform_jobs_needed = PerformJobsNeeded::AvoidDos;
-                    }
-                } else {
-                    info!(
-                        context,
-                        "{} thread removes job {} as it exhausted {} retries",
-                        thread,
-                        job,
-                        JOB_RETRIES
-                    );
-                    if job.action == Action::SendMsgToSmtp {
-                        message::set_msg_failed(
-                            context,
-                            MsgId::new(job.foreign_id),
-                            job.pending_error.as_ref(),
-                        );
-                    }
-                    job.delete(context);
+        } else if job.try_again == TryAgain::AtOnce || job.try_again == TryAgain::StandardDelay {
+            let tries = job.tries + 1;
+            if tries < JOB_RETRIES {
+                job.tries = tries;
+                let time_offset = get_backoff_time_offset(tries);
+                job.desired_timestamp = time() + time_offset;
+                job.update(context);
+                info!(
+                    context,
+                    "{}-job #{} not succeeded on try #{}, retry in {} seconds.",
+                    if thread == Thread::Imap {
+                        "INBOX"
+                    } else {
+                        "SMTP"
+                    },
+                    job.job_id as u32,
+                    tries,
+                    time_offset
+                );
+                if thread == Thread::Smtp && tries < JOB_RETRIES - 1 {
+                    context
+                        .smtp_state
+                        .clone()
+                        .0
+                        .lock()
+                        .unwrap()
+                        .perform_jobs_needed = PerformJobsNeeded::AvoidDos;
                }
-                if !probe_network {
-                    continue;
-                }
-                // on dc_maybe_network() we stop trying here;
-                // these jobs are already tried once.
-                // otherwise, we just continue with the next job
-                // to give other jobs a chance being tried at least once.
-                break;
-            }
-            Status::Finished(res) => {
-                if let Err(err) = res {
-                    warn!(
+            } else {
+                if job.action == Action::SendMsgToSmtp {
+                    message::set_msg_failed(
                        context,
-                        "{} removes job {} as it failed with error {:?}", thread, job, err
-                    );
-                } else {
-                    info!(
-                        context,
-                        "{} removes job {} as it cannot be retried", thread, job
+                        MsgId::new(job.foreign_id),
+                        job.pending_error.as_ref(),
                    );
                }
-
                job.delete(context);
            }
+            if !probe_network {
+                continue;
+            }
+            // on dc_maybe_network() we stop trying here;
+            // these jobs are already tried once.
+            // otherwise, we just continue with the next job
+            // to give other jobs a chance being tried at least once.
+            break;
+        } else {
+            job.delete(context);
        }
    }
 }
@@ -937,12 +846,12 @@ fn suspend_smtp_thread(context: &Context, suspend: bool) {
            if !context.smtp_state.0.lock().unwrap().doing_jobs {
                return;
            }
-            std::thread::sleep(time::Duration::from_micros(300 * 1000));
+            std::thread::sleep(std::time::Duration::from_micros(300 * 1000));
        }
    }
 }

-fn send_mdn(context: &Context, msg_id: MsgId) -> Result<()> {
+fn send_mdn(context: &Context, msg_id: MsgId) -> Result<(), Error> {
    let msg = Message::load_from_db(context, msg_id)?;
    let mimefactory = MimeFactory::from_mdn(context, &msg)?;
    let rendered_msg = mimefactory.render()?;
@@ -952,7 +861,12 @@ fn send_mdn(context: &Context, msg_id: MsgId) -> Result<()> {
    Ok(())
 }

-fn add_smtp_job(context: &Context, action: Action, rendered_msg: &RenderedEmail) -> Result<()> {
+#[allow(non_snake_case)]
+fn add_smtp_job(
+    context: &Context,
+    action: Action,
+    rendered_msg: &RenderedEmail,
+) -> Result<(), Error> {
    ensure!(
        !rendered_msg.recipients.is_empty(),
        "no recipients for smtp job set"
@@ -979,8 +893,6 @@ fn add_smtp_job(context: &Context, action: Action, rendered_msg: &RenderedEmail)
    Ok(())
 }

-/// Adds a job to the database, scheduling it `delay_seconds`
-/// after the current time.
 pub fn job_add(
    context: &Context,
    action: Action,
@@ -1011,7 +923,7 @@ pub fn job_add(
    ).ok();

    match thread {
-        Thread::Imap => interrupt_inbox_idle(context),
+        Thread::Imap => interrupt_inbox_idle(context, false),
        Thread::Smtp => interrupt_smtp_idle(context),
        Thread::Unknown => {}
    }
@@ -1071,6 +983,7 @@ fn load_jobs(context: &Context, thread: Thread, probe_network: bool) -> Vec<Job>
                    added_timestamp: row.get(4)?,
                    tries: row.get(6)?,
                    param: row.get::<_, String>(3)?.parse().unwrap_or_default(),
+                    try_again: TryAgain::Dont,
                    pending_error: None,
                };

--- a/src/job_thread.rs
+++ b/src/job_thread.rs
@@ -73,7 +73,7 @@ impl JobThread {
        info!(context, "Interrupting {}-IDLE... finished", self.name);
    }

-    pub async fn fetch(&mut self, context: &Context, use_network: bool) {
+    pub fn fetch(&mut self, context: &Context, use_network: bool) {
        {
            let &(ref lock, _) = &*self.state.clone();
            let mut state = lock.lock().unwrap();
@@ -86,10 +86,10 @@ impl JobThread {
        }

        if use_network {
-            if let Err(err) = self.connect_and_fetch(context).await {
+            if let Err(err) = self.connect_and_fetch(context) {
                warn!(context, "connect+fetch failed: {}, reconnect & retry", err);
                self.imap.trigger_reconnect();
-                if let Err(err) = self.connect_and_fetch(context).await {
+                if let Err(err) = self.connect_and_fetch(context) {
                    warn!(context, "connect+fetch failed: {}", err);
                }
            }
@@ -97,18 +97,14 @@ impl JobThread {
        self.state.0.lock().unwrap().using_handle = false;
    }

-    async fn connect_and_fetch(&mut self, context: &Context) -> Result<()> {
+    fn connect_and_fetch(&mut self, context: &Context) -> Result<()> {
        let prefix = format!("{}-fetch", self.name);
        match self.imap.connect_configured(context) {
            Ok(()) => {
                if let Some(watch_folder) = self.get_watch_folder(context) {
                    let start = std::time::Instant::now();
                    info!(context, "{} started...", prefix);
-                    let res = self
-                        .imap
-                        .fetch(context, &watch_folder)
-                        .await
-                        .map_err(Into::into);
+                    let res = self.imap.fetch(context, &watch_folder).map_err(Into::into);
                    let elapsed = start.elapsed().as_millis();
                    info!(context, "{} done in {:.3} ms.", prefix, elapsed);

@@ -174,19 +170,20 @@ impl JobThread {
        let prefix = format!("{}-IDLE", self.name);
        let do_fake_idle = match self.imap.connect_configured(context) {
            Ok(()) => {
-                if !self.imap.can_idle() {
-                    true // we have to do fake_idle
-                } else {
-                    let watch_folder = self.get_watch_folder(context);
-                    info!(context, "{} started...", prefix);
-                    let res = self.imap.idle(context, watch_folder);
-                    info!(context, "{} ended...", prefix);
-                    if let Err(err) = res {
+                info!(context, "{} started...", prefix);
+                let watch_folder = self.get_watch_folder(context);
+                let res = self.imap.idle(context, watch_folder);
+                info!(context, "{} ended...", prefix);
+                match res {
+                    Ok(()) => false,
+                    Err(crate::imap::Error::IdleAbilityMissing) => true, // we have to do fake_idle
+                    Err(err) => {
                        warn!(context, "{} failed: {} -> reconnecting", prefix, err);
                        // something is borked, let's start afresh on the next occassion
                        self.imap.disconnect(context);
+
+                        false
                    }
-                    false
                }
            }
            Err(err) => {
--- a/src/key.rs
+++ b/src/key.rs
@@ -178,9 +178,21 @@ impl Key {
        }
    }

-    pub fn to_base64(&self) -> String {
+    pub fn to_base64(&self, break_every: usize) -> String {
        let buf = self.to_bytes();
-        base64::encode(&buf)
+
+        let encoded = base64::encode(&buf);
+        encoded
+            .chars()
+            .enumerate()
+            .fold(String::new(), |mut res, (i, c)| {
+                if i > 0 && i % break_every == 0 {
+                    res.push(' ')
+                }
+                res.push(c);
+                res
+            })
+            .to_string()
    }

    pub fn to_armored_string(
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,9 +1,9 @@
-#![deny(clippy::correctness, missing_debug_implementations, clippy::all)]
-// for now we hide warnings to not clutter/hide errors during "cargo clippy"
-#![allow(clippy::cognitive_complexity, clippy::too_many_arguments)]
-#![allow(clippy::match_bool)]
+#![deny(clippy::correctness, missing_debug_implementations)]
+// TODO: make all of these errors, such that clippy actually passes.
+#![warn(clippy::all, clippy::perf, clippy::not_unsafe_ptr_arg_deref)]
+// This is nice, but for now just annoying.
+#![allow(clippy::unreadable_literal)]
 #![feature(ptr_wrapping_offset_from)]
-#![feature(drain_filter)]

 #[macro_use]
 extern crate failure_derive;
@@ -20,12 +20,10 @@ extern crate strum_macros;
 extern crate debug_stub_derive;

 #[macro_use]
-pub mod log;
+mod log;
 #[macro_use]
 pub mod error;

-pub mod headerdef;
-
 pub(crate) mod events;
 pub use events::*;

@@ -42,7 +40,6 @@ mod e2ee;
 mod imap;
 mod imap_client;
 pub mod imex;
-#[macro_use]
 pub mod job;
 mod job_thread;
 pub mod key;
@@ -59,22 +56,19 @@ pub mod peerstate;
 pub mod pgp;
 pub mod qr;
 pub mod securejoin;
-mod simplify;
 mod smtp;
 pub mod sql;
 pub mod stock;
 mod token;
 #[macro_use]
+mod wrapmime;
 mod dehtml;

+pub mod dc_array;
 pub mod dc_receive_imf;
+mod dc_simplify;
+mod dc_strencode;
 pub mod dc_tools;

-/// if set imap/incoming and smtp/outgoing MIME messages will be printed
-pub const DCC_MIME_DEBUG: &str = "DCC_MIME_DEBUG";
-
-/// if set IMAP protocol commands and responses will be printed
-pub const DCC_IMAP_DEBUG: &str = "DCC_IMAP_DEBUG";
-
 #[cfg(test)]
 mod test_utils;
--- a/src/location.rs
+++ b/src/location.rs
@@ -11,7 +11,7 @@ use crate::context::*;
 use crate::dc_tools::*;
 use crate::error::Error;
 use crate::events::Event;
-use crate::job::{self, job_action_exists, job_add, Job};
+use crate::job::*;
 use crate::message::{Message, MsgId};
 use crate::mimeparser::SystemMessage;
 use crate::param::*;
@@ -228,7 +228,7 @@ pub fn send_locations_to_chat(context: &Context, chat_id: u32, seconds: i64) {
                schedule_MAYBE_SEND_LOCATIONS(context, false);
                job_add(
                    context,
-                    job::Action::MaybeSendLocationsEnded,
+                    Action::MaybeSendLocationsEnded,
                    chat_id as i32,
                    Params::new(),
                    seconds + 1,
@@ -240,14 +240,8 @@ pub fn send_locations_to_chat(context: &Context, chat_id: u32, seconds: i64) {

 #[allow(non_snake_case)]
 fn schedule_MAYBE_SEND_LOCATIONS(context: &Context, force_schedule: bool) {
-    if force_schedule || !job_action_exists(context, job::Action::MaybeSendLocations) {
-        job_add(
-            context,
-            job::Action::MaybeSendLocations,
-            0,
-            Params::new(),
-            60,
-        );
+    if force_schedule || !job_action_exists(context, Action::MaybeSendLocations) {
+        job_add(context, Action::MaybeSendLocations, 0, Params::new(), 60);
    };
 }

@@ -548,7 +542,7 @@ pub fn save(
 }

 #[allow(non_snake_case)]
-pub fn JobMaybeSendLocations(context: &Context, _job: &Job) -> job::Status {
+pub fn JobMaybeSendLocations(context: &Context, _job: &Job) {
    let now = time();
    let mut continue_streaming = false;
    info!(
@@ -635,40 +629,38 @@ pub fn JobMaybeSendLocations(context: &Context, _job: &Job) -> job::Status {
    if continue_streaming {
        schedule_MAYBE_SEND_LOCATIONS(context, true);
    }
-    job::Status::Finished(Ok(()))
 }

 #[allow(non_snake_case)]
-pub fn JobMaybeSendLocationsEnded(context: &Context, job: &mut Job) -> job::Status {
+pub fn JobMaybeSendLocationsEnded(context: &Context, job: &mut Job) {
    // this function is called when location-streaming _might_ have ended for a chat.
    // the function checks, if location-streaming is really ended;
    // if so, a device-message is added if not yet done.

    let chat_id = job.foreign_id;

-    let (send_begin, send_until) = job_try!(context.sql.query_row(
+    if let Ok((send_begin, send_until)) = context.sql.query_row(
        "SELECT locations_send_begin, locations_send_until  FROM chats  WHERE id=?",
        params![chat_id as i32],
        |row| Ok((row.get::<_, i64>(0)?, row.get::<_, i64>(1)?)),
-    ));
-
-    if !(send_begin != 0 && time() <= send_until) {
-        // still streaming -
-        // may happen as several calls to dc_send_locations_to_chat()
-        // do not un-schedule pending DC_MAYBE_SEND_LOC_ENDED jobs
-        if !(send_begin == 0 && send_until == 0) {
-            // not streaming, device-message already sent
-            job_try!(context.sql.execute(
-                "UPDATE chats    SET locations_send_begin=0, locations_send_until=0  WHERE id=?",
-                params![chat_id as i32],
-            ));
-
-            let stock_str = context.stock_system_msg(StockMessage::MsgLocationDisabled, "", "", 0);
-            chat::add_info_msg(context, chat_id, stock_str);
-            context.call_cb(Event::ChatModified(chat_id));
+    ) {
+        if !(send_begin != 0 && time() <= send_until) {
+            // still streaming -
+            // may happen as several calls to dc_send_locations_to_chat()
+            // do not un-schedule pending DC_MAYBE_SEND_LOC_ENDED jobs
+            if !(send_begin == 0 && send_until == 0) {
+                // not streaming, device-message already sent
+                if context.sql.execute(
+                    "UPDATE chats    SET locations_send_begin=0, locations_send_until=0  WHERE id=?",
+                    params![chat_id as i32],
+                ).is_ok() {
+                    let stock_str = context.stock_system_msg(StockMessage::MsgLocationDisabled, "", "", 0);
+                    chat::add_info_msg(context, chat_id, stock_str);
+                    context.call_cb(Event::ChatModified(chat_id));
+                }
+            }
        }
    }
-    job::Status::Finished(Ok(()))
 }

 #[cfg(test)]
--- a/src/log.rs
+++ b/src/log.rs
@@ -7,13 +7,7 @@ macro_rules! info {
    };
    ($ctx:expr, $msg:expr, $($args:expr),* $(,)?) => {{
        let formatted = format!($msg, $($args),*);
-        let thread = ::std::thread::current();
-        let full = format!("{thid:?} {file}:{line}: {msg}",
-                           thid = thread.id(),
-                           file = file!(),
-                           line = line!(),
-                           msg = &formatted);
-        emit_event!($ctx, $crate::Event::Info(full));
+        emit_event!($ctx, $crate::Event::Info(formatted));
    }};
 }

@@ -24,13 +18,7 @@ macro_rules! warn {
    };
    ($ctx:expr, $msg:expr, $($args:expr),* $(,)?) => {{
        let formatted = format!($msg, $($args),*);
-        let thread = ::std::thread::current();
-        let full = format!("{thid:?} {file}:{line}: {msg}",
-                           thid = thread.id(),
-                           file = file!(),
-                           line = line!(),
-                           msg = &formatted);
-        emit_event!($ctx, $crate::Event::Warning(full));
+        emit_event!($ctx, $crate::Event::Warning(formatted));
    }};
 }

--- a/src/login_param.rs
+++ b/src/login_param.rs
@@ -1,9 +1,12 @@
-//! # Login parameters
-
 use std::borrow::Cow;
 use std::fmt;

 use crate::context::Context;
+use crate::error::Error;
+use async_std::sync::Arc;
+use rustls;
+use webpki;
+use webpki_roots;

 #[derive(Copy, Clone, Debug, Display, FromPrimitive)]
 #[repr(i32)]
@@ -11,11 +14,7 @@ use crate::context::Context;
 pub enum CertificateChecks {
    Automatic = 0,
    Strict = 1,
-
-    /// Same as AcceptInvalidCertificates
-    /// Previously known as AcceptInvalidHostnames, now deprecated.
-    AcceptInvalidCertificates2 = 2,
-
+    AcceptInvalidHostnames = 2,
    AcceptInvalidCertificates = 3,
 }

@@ -105,7 +104,7 @@ impl LoginParam {
        let server_flags = sql.get_raw_config_int(context, key).unwrap_or_default();

        LoginParam {
-            addr,
+            addr: addr.to_string(),
            mail_server,
            mail_user,
            mail_pw,
@@ -129,7 +128,7 @@ impl LoginParam {
        &self,
        context: &Context,
        prefix: impl AsRef<str>,
-    ) -> crate::sql::Result<()> {
+    ) -> Result<(), Error> {
        let prefix = prefix.as_ref();
        let sql = &context.sql;

@@ -199,7 +198,6 @@ impl fmt::Display for LoginParam {
    }
 }

-#[allow(clippy::ptr_arg)]
 fn unset_empty(s: &String) -> Cow<String> {
    if s.is_empty() {
        Cow::Owned("unset".to_string())
@@ -208,45 +206,44 @@ fn unset_empty(s: &String) -> Cow<String> {
    }
 }

-#[allow(clippy::useless_let_if_seq)]
 fn get_readable_flags(flags: i32) -> String {
    let mut res = String::new();
    for bit in 0..31 {
        if 0 != flags & 1 << bit {
-            let mut flag_added = false;
+            let mut flag_added = 0;
            if 1 << bit == 0x2 {
                res += "OAUTH2 ";
-                flag_added = true;
+                flag_added = 1;
            }
            if 1 << bit == 0x4 {
                res += "AUTH_NORMAL ";
-                flag_added = true;
+                flag_added = 1;
            }
            if 1 << bit == 0x100 {
                res += "IMAP_STARTTLS ";
-                flag_added = true;
+                flag_added = 1;
            }
            if 1 << bit == 0x200 {
                res += "IMAP_SSL ";
-                flag_added = true;
+                flag_added = 1;
            }
            if 1 << bit == 0x400 {
                res += "IMAP_PLAIN ";
-                flag_added = true;
+                flag_added = 1;
            }
            if 1 << bit == 0x10000 {
                res += "SMTP_STARTTLS ";
-                flag_added = true;
+                flag_added = 1
            }
            if 1 << bit == 0x20000 {
                res += "SMTP_SSL ";
-                flag_added = true;
+                flag_added = 1
            }
            if 1 << bit == 0x40000 {
                res += "SMTP_PLAIN ";
-                flag_added = true;
+                flag_added = 1
            }
-            if flag_added {
+            if 0 == flag_added {
                res += &format!("{:#0x}", 1 << bit);
            }
        }
@@ -258,25 +255,49 @@ fn get_readable_flags(flags: i32) -> String {
    res
 }

-pub fn dc_build_tls(
-    certificate_checks: CertificateChecks,
-) -> Result<native_tls::TlsConnector, native_tls::Error> {
-    let mut tls_builder = native_tls::TlsConnector::builder();
+pub struct NoCertificateVerification {}
+
+impl rustls::ServerCertVerifier for NoCertificateVerification {
+    fn verify_server_cert(
+        &self,
+        _roots: &rustls::RootCertStore,
+        _presented_certs: &[rustls::Certificate],
+        _dns_name: webpki::DNSNameRef<'_>,
+        _ocsp: &[u8],
+    ) -> Result<rustls::ServerCertVerified, rustls::TLSError> {
+        Ok(rustls::ServerCertVerified::assertion())
+    }
+}
+
+pub fn dc_build_tls_config(certificate_checks: CertificateChecks) -> rustls::ClientConfig {
+    let mut config = rustls::ClientConfig::new();
+    config
+        .root_store
+        .add_server_trust_anchors(&webpki_roots::TLS_SERVER_ROOTS);
+
    match certificate_checks {
+        CertificateChecks::Strict => {}
        CertificateChecks::Automatic => {
            // Same as AcceptInvalidCertificates for now.
            // TODO: use provider database when it becomes available
-            tls_builder
-                .danger_accept_invalid_hostnames(true)
-                .danger_accept_invalid_certs(true)
+            config
+                .dangerous()
+                .set_certificate_verifier(Arc::new(NoCertificateVerification {}));
+        }
+        CertificateChecks::AcceptInvalidCertificates => {
+            // TODO: only accept invalid certs
+            config
+                .dangerous()
+                .set_certificate_verifier(Arc::new(NoCertificateVerification {}));
+        }
+        CertificateChecks::AcceptInvalidHostnames => {
+            // TODO: only accept invalid hostnames
+            config
+                .dangerous()
+                .set_certificate_verifier(Arc::new(NoCertificateVerification {}));
        }
-        CertificateChecks::Strict => &mut tls_builder,
-        CertificateChecks::AcceptInvalidCertificates
-        | CertificateChecks::AcceptInvalidCertificates2 => tls_builder
-            .danger_accept_invalid_hostnames(true)
-            .danger_accept_invalid_certs(true),
    }
-    .build()
+    config
 }

 #[cfg(test)]
@@ -288,8 +309,8 @@ mod tests {
        use std::string::ToString;

        assert_eq!(
-            "accept_invalid_certificates".to_string(),
-            CertificateChecks::AcceptInvalidCertificates.to_string()
+            "accept_invalid_hostnames".to_string(),
+            CertificateChecks::AcceptInvalidHostnames.to_string()
        );
    }
 }
--- a/src/lot.rs
+++ b/src/lot.rs
@@ -5,7 +5,7 @@ use deltachat_derive::{FromSql, ToSql};
 /// Lot objects are created
 /// eg. by chatlist.get_summary() or dc_msg_get_summary().
 ///
-/// *Lot* is used in the meaning *heap* here.
+/// _Lot_ is used in the meaning _heap_ here.
 #[derive(Default, Debug, Clone)]
 pub struct Lot {
    pub(crate) text1_meaning: Meaning,
@@ -73,28 +73,20 @@ pub enum LotState {
    // Qr States
    /// id=contact
    QrAskVerifyContact = 200,
-
    /// text1=groupname
    QrAskVerifyGroup = 202,
-
    /// id=contact
    QrFprOk = 210,
-
    /// id=contact
    QrFprMissmatch = 220,
-
    /// test1=formatted fingerprint
    QrFprWithoutAddr = 230,
-
    /// id=contact
    QrAddr = 320,
-
    /// text1=text
    QrText = 330,
-
    /// text1=URL
    QrUrl = 332,
-
    /// text1=error string
    QrError = 400,

--- a/src/message.rs
+++ b/src/message.rs
@@ -1,5 +1,3 @@
-//! # Messages and their identifiers
-
 use std::path::{Path, PathBuf};

 use deltachat_derive::{FromSql, ToSql};
@@ -46,7 +44,7 @@ impl MsgId {
    /// Whether the message ID signifies a special message.
    ///
    /// This kind of message ID can not be used for real messages.
-    pub fn is_special(self) -> bool {
+    pub fn is_special(&self) -> bool {
        match self.0 {
            0..=DC_MSG_ID_LAST_SPECIAL => true,
            _ => false,
@@ -62,21 +60,21 @@ impl MsgId {
    ///
    /// When this is `true`, [MsgId::is_special] will also always be
    /// `true`.
-    pub fn is_unset(self) -> bool {
+    pub fn is_unset(&self) -> bool {
        self.0 == 0
    }

    /// Whether the message ID is the special marker1 marker.
    ///
    /// See the docs of the `dc_get_chat_msgs` C API for details.
-    pub fn is_marker1(self) -> bool {
+    pub fn is_marker1(&self) -> bool {
        self.0 == DC_MSG_ID_MARKER1
    }

    /// Whether the message ID is the special day marker.
    ///
    /// See the docs of the `dc_get_chat_msgs` C API for details.
-    pub fn is_daymarker(self) -> bool {
+    pub fn is_daymarker(&self) -> bool {
        self.0 == DC_MSG_ID_DAYMARKER
    }

@@ -84,7 +82,7 @@ impl MsgId {
    ///
    /// Avoid using this, eventually types should be cleaned up enough
    /// that it is no longer necessary.
-    pub fn to_u32(self) -> u32 {
+    pub fn to_u32(&self) -> u32 {
        self.0
    }
 }
@@ -148,22 +146,6 @@ impl rusqlite::types::FromSql for MsgId {
 #[fail(display = "Invalid Message ID.")]
 pub struct InvalidMsgId;

-#[derive(Debug, Copy, Clone, PartialEq, FromPrimitive, ToPrimitive, FromSql, ToSql)]
-#[repr(u8)]
-pub enum MessengerMessage {
-    No = 0,
-    Yes = 1,
-
-    /// No, but reply to messenger message.
-    Reply = 2,
-}
-
-impl Default for MessengerMessage {
-    fn default() -> Self {
-        Self::No
-    }
-}
-
 /// An object representing a single message in memory.
 /// The message object is not updated.
 /// If you want an update, you have to recreate the object.
@@ -177,7 +159,7 @@ pub struct Message {
    pub(crate) from_id: u32,
    pub(crate) to_id: u32,
    pub(crate) chat_id: u32,
-    pub(crate) viewtype: Viewtype,
+    pub(crate) type_0: Viewtype,
    pub(crate) state: MessageState,
    pub(crate) hidden: bool,
    pub(crate) timestamp_sort: i64,
@@ -188,7 +170,8 @@ pub struct Message {
    pub(crate) in_reply_to: Option<String>,
    pub(crate) server_folder: Option<String>,
    pub(crate) server_uid: u32,
-    pub(crate) is_dc_message: MessengerMessage,
+    // TODO: enum
+    pub(crate) is_dc_message: u32,
    pub(crate) starred: bool,
    pub(crate) chat_blocked: Blocked,
    pub(crate) location_id: u32,
@@ -198,7 +181,7 @@ pub struct Message {
 impl Message {
    pub fn new(viewtype: Viewtype) -> Self {
        let mut msg = Message::default();
-        msg.viewtype = viewtype;
+        msg.type_0 = viewtype;

        msg
    }
@@ -251,7 +234,7 @@ impl Message {
                    msg.timestamp_sort = row.get("timestamp")?;
                    msg.timestamp_sent = row.get("timestamp_sent")?;
                    msg.timestamp_rcvd = row.get("timestamp_rcvd")?;
-                    msg.viewtype = row.get("type")?;
+                    msg.type_0 = row.get("type")?;
                    msg.state = row.get("state")?;
                    msg.is_dc_message = row.get("msgrmsg")?;

@@ -327,10 +310,10 @@ impl Message {
    }

    pub fn try_calc_and_set_dimensions(&mut self, context: &Context) -> Result<(), Error> {
-        if chat::msgtype_has_file(self.viewtype) {
+        if chat::msgtype_has_file(self.type_0) {
            let file_param = self.param.get_path(Param::File, context)?;
            if let Some(path_and_filename) = file_param {
-                if (self.viewtype == Viewtype::Image || self.viewtype == Viewtype::Gif)
+                if (self.type_0 == Viewtype::Image || self.type_0 == Viewtype::Gif)
                    && !self.param.exists(Param::Width)
                {
                    self.param.set_int(Param::Width, 0);
@@ -409,7 +392,7 @@ impl Message {
    }

    pub fn get_viewtype(&self) -> Viewtype {
-        self.viewtype
+        self.type_0
    }

    pub fn get_state(&self) -> MessageState {
@@ -489,7 +472,7 @@ impl Message {

    pub fn get_summarytext(&self, context: &Context, approx_characters: usize) -> String {
        get_summarytext_by_raw(
-            self.viewtype,
+            self.type_0,
            self.text.as_ref(),
            &self.param,
            approx_characters,
@@ -533,11 +516,11 @@ impl Message {
    /// copied to the blobdir.  Thus those attachments need to be
    /// created immediately in the blobdir with a valid filename.
    pub fn is_increation(&self) -> bool {
-        chat::msgtype_has_file(self.viewtype) && self.state == MessageState::OutPreparing
+        chat::msgtype_has_file(self.type_0) && self.state == MessageState::OutPreparing
    }

    pub fn is_setupmessage(&self) -> bool {
-        if self.viewtype != Viewtype::File {
+        if self.type_0 != Viewtype::File {
            return false;
        }

@@ -702,9 +685,9 @@ impl Lot {
        }

        self.text2 = Some(get_summarytext_by_raw(
-            msg.viewtype,
+            msg.type_0,
            msg.text.as_ref(),
-            &msg.param,
+            &mut msg.param,
            SUMMARY_CHARACTERS,
            context,
        ));
@@ -735,7 +718,7 @@ pub fn get_msg_info(context: &Context, msg_id: MsgId) -> String {
        return ret;
    }
    let rawtxt = rawtxt.unwrap_or_default();
-    let rawtxt = dc_truncate(rawtxt.trim(), 100_000, false);
+    let rawtxt = dc_truncate(rawtxt.trim(), 100000, false);

    let fts = dc_timestamp_to_str(msg.get_timestamp());
    ret += &format!("Sent: {}", fts);
@@ -823,9 +806,9 @@ pub fn get_msg_info(context: &Context, msg_id: MsgId) -> String {
        ret += &format!("\nFile: {}, {}, bytes\n", path.display(), bytes);
    }

-    if msg.viewtype != Viewtype::Text {
+    if msg.type_0 != Viewtype::Text {
        ret += "Type: ";
-        ret += &format!("{}", msg.viewtype);
+        ret += &format!("{}", msg.type_0);
        ret += "\n";
        ret += &format!("Mimetype: {}\n", &msg.get_filemime().unwrap_or_default());
    }
@@ -859,7 +842,6 @@ pub fn guess_msgtype_from_suffix(path: &Path) -> Option<(Viewtype, &str)> {
        "mp3" => (Viewtype::Audio, "audio/mpeg"),
        "aac" => (Viewtype::Audio, "audio/aac"),
        "mp4" => (Viewtype::Video, "video/mp4"),
-        "webm" => (Viewtype::Video, "video/webm"),
        "jpg" => (Viewtype::Image, "image/jpeg"),
        "jpeg" => (Viewtype::Image, "image/jpeg"),
        "jpe" => (Viewtype::Image, "image/jpeg"),
@@ -1236,10 +1218,9 @@ pub fn mdn_from_ext(
                } // else wait for more receipts
            }
        }
-        return if read_by_all {
-            Some((chat_id, msg_id))
-        } else {
-            None
+        return match read_by_all {
+            true => Some((chat_id, msg_id)),
+            false => None,
        };
    }
    None
@@ -1387,32 +1368,50 @@ mod tests {
        some_file.set(Param::File, "foo.bar");

        assert_eq!(
-            get_summarytext_by_raw(Viewtype::Text, some_text.as_ref(), &Params::new(), 50, &ctx),
+            get_summarytext_by_raw(
+                Viewtype::Text,
+                some_text.as_ref(),
+                &mut Params::new(),
+                50,
+                &ctx
+            ),
            "bla bla" // for simple text, the type is not added to the summary
        );

        assert_eq!(
-            get_summarytext_by_raw(Viewtype::Image, no_text.as_ref(), &some_file, 50, &ctx,),
+            get_summarytext_by_raw(Viewtype::Image, no_text.as_ref(), &mut some_file, 50, &ctx,),
            "Image" // file names are not added for images
        );

        assert_eq!(
-            get_summarytext_by_raw(Viewtype::Video, no_text.as_ref(), &some_file, 50, &ctx,),
+            get_summarytext_by_raw(Viewtype::Video, no_text.as_ref(), &mut some_file, 50, &ctx,),
            "Video" // file names are not added for videos
        );

        assert_eq!(
-            get_summarytext_by_raw(Viewtype::Gif, no_text.as_ref(), &some_file, 50, &ctx,),
+            get_summarytext_by_raw(Viewtype::Gif, no_text.as_ref(), &mut some_file, 50, &ctx,),
            "GIF" // file names are not added for GIFs
        );

        assert_eq!(
-            get_summarytext_by_raw(Viewtype::Sticker, no_text.as_ref(), &some_file, 50, &ctx,),
+            get_summarytext_by_raw(
+                Viewtype::Sticker,
+                no_text.as_ref(),
+                &mut some_file,
+                50,
+                &ctx,
+            ),
            "Sticker" // file names are not added for stickers
        );

        assert_eq!(
-            get_summarytext_by_raw(Viewtype::Voice, empty_text.as_ref(), &some_file, 50, &ctx,),
+            get_summarytext_by_raw(
+                Viewtype::Voice,
+                empty_text.as_ref(),
+                &mut some_file,
+                50,
+                &ctx,
+            ),
            "Voice message" // file names are not added for voice messages, empty text is skipped
        );

@@ -1422,7 +1421,13 @@ mod tests {
        );

        assert_eq!(
-            get_summarytext_by_raw(Viewtype::Voice, some_text.as_ref(), &some_file, 50, &ctx),
+            get_summarytext_by_raw(
+                Viewtype::Voice,
+                some_text.as_ref(),
+                &mut some_file,
+                50,
+                &ctx
+            ),
            "Voice message \u{2013} bla bla" // `\u{2013}` explicitly checks for "EN DASH"
        );

@@ -1432,12 +1437,24 @@ mod tests {
        );

        assert_eq!(
-            get_summarytext_by_raw(Viewtype::Audio, empty_text.as_ref(), &some_file, 50, &ctx,),
+            get_summarytext_by_raw(
+                Viewtype::Audio,
+                empty_text.as_ref(),
+                &mut some_file,
+                50,
+                &ctx,
+            ),
            "Audio \u{2013} foo.bar" // file name is added for audio, empty text is not added
        );

        assert_eq!(
-            get_summarytext_by_raw(Viewtype::Audio, some_text.as_ref(), &some_file, 50, &ctx),
+            get_summarytext_by_raw(
+                Viewtype::Audio,
+                some_text.as_ref(),
+                &mut some_file,
+                50,
+                &ctx
+            ),
            "Audio \u{2013} foo.bar \u{2013} bla bla" // file name and text added for audio
        );

--- a/src/mimefactory.rs
+++ b/src/mimefactory.rs
@@ -1,12 +1,12 @@
 use chrono::TimeZone;
 use lettre_email::{mime, Address, Header, MimeMultipartType, PartBuilder};

-use crate::blob::BlobObject;
 use crate::chat::{self, Chat};
 use crate::config::Config;
 use crate::constants::*;
 use crate::contact::*;
 use crate::context::{get_version_str, Context};
+use crate::dc_strencode::*;
 use crate::dc_tools::*;
 use crate::e2ee::*;
 use crate::error::Error;
@@ -42,7 +42,6 @@ pub struct MimeFactory<'a, 'b> {
    pub req_mdn: bool,
    pub context: &'a Context,
    last_added_location_id: u32,
-    attach_selfavatar: bool,
 }

 /// Result of rendering a message, ready to be submitted to a send job.
@@ -64,11 +63,7 @@ pub struct RenderedEmail {
 }

 impl<'a, 'b> MimeFactory<'a, 'b> {
-    pub fn from_msg(
-        context: &'a Context,
-        msg: &'b Message,
-        add_selfavatar: bool,
-    ) -> Result<MimeFactory<'a, 'b>, Error> {
+    pub fn from_msg(context: &'a Context, msg: &'b Message) -> Result<MimeFactory<'a, 'b>, Error> {
        let chat = Chat::load_from_db(context, msg.chat_id)?;

        let mut factory = MimeFactory {
@@ -90,7 +85,6 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
            references: String::default(),
            req_mdn: false,
            last_added_location_id: 0,
-            attach_selfavatar: add_selfavatar,
            context,
        };

@@ -137,12 +131,11 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                    .get_config(Config::ConfiguredAddr)
                    .unwrap_or_default();

-                if !email_to_remove.is_empty()
-                    && !addr_cmp(email_to_remove, self_addr)
-                    && !vec_contains_lowercase(&factory.recipients_addr, &email_to_remove)
-                {
-                    factory.recipients_names.push("".to_string());
-                    factory.recipients_addr.push(email_to_remove.to_string());
+                if !email_to_remove.is_empty() && !addr_cmp(email_to_remove, self_addr) {
+                    if !vec_contains_lowercase(&factory.recipients_addr, &email_to_remove) {
+                        factory.recipients_names.push("".to_string());
+                        factory.recipients_addr.push(email_to_remove.to_string());
+                    }
                }
            }
            if command != SystemMessage::AutocryptSetupMessage
@@ -159,10 +152,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                let in_reply_to: String = row.get(0)?;
                let references: String = row.get(1)?;

-                Ok((
-                    render_rfc724_mid_list(&in_reply_to),
-                    render_rfc724_mid_list(&references),
-                ))
+                Ok((in_reply_to, references))
            },
        );

@@ -217,7 +207,6 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
            references: String::default(),
            req_mdn: false,
            last_added_location_id: 0,
-            attach_selfavatar: false,
        })
    }

@@ -295,7 +284,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                        .unwrap_or_default()
                }
            }
-            Loaded::MDN => ForcePlaintext::NoAutocryptHeader as i32,
+            Loaded::MDN => DC_FP_NO_AUTOCRYPT_HEADER,
        }
    }

@@ -304,12 +293,20 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
            Loaded::Message => {
                let chat = self.chat.as_ref().unwrap();
                // beside key- and member-changes, force re-gossip every 48 hours
-                let gossiped_timestamp = chat.get_gossiped_timestamp(self.context);
-                if time() > gossiped_timestamp + (2 * 24 * 60 * 60) {
+                if chat.gossiped_timestamp == 0
+                    || (chat.gossiped_timestamp + (2 * 24 * 60 * 60)) > time()
+                {
                    return true;
                }

-                self.msg.param.get_cmd() == SystemMessage::MemberAddedToGroup
+                match self.msg.param.get_cmd() {
+                    SystemMessage::MemberAddedToGroup => {
+                        return true;
+                    }
+                    _ => {}
+                }
+
+                false
            }
            Loaded::MDN => false,
        }
@@ -331,15 +328,6 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                    _ => {}
                }

-                if self
-                    .msg
-                    .param
-                    .get_bool(Param::AttachGroupImage)
-                    .unwrap_or_default()
-                {
-                    return chat.param.get(Param::ProfileImage).map(Into::into);
-                }
-
                None
            }
            Loaded::MDN => None,
@@ -351,19 +339,13 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
            Loaded::Message => {
                match self.chat {
                    Some(ref chat) => {
-                        let raw = message::get_summarytext_by_raw(
-                            self.msg.viewtype,
+                        let raw_subject = message::get_summarytext_by_raw(
+                            self.msg.type_0,
                            self.msg.text.as_ref(),
                            &self.msg.param,
                            32,
                            self.context,
                        );
-                        let mut lines = raw.lines();
-                        let raw_subject = if let Some(line) = lines.next() {
-                            line
-                        } else {
-                            ""
-                        };

                        let afwd_email = self.msg.param.exists(Param::Forwarded);
                        let fwd = if afwd_email { "Fwd: " } else { "" };
@@ -401,7 +383,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
        let mut unprotected_headers: Vec<Header> = Vec::new();

        let from = Address::new_mailbox_with_name(
-            self.from_displayname.to_string(),
+            dc_encode_header_words(&self.from_displayname),
            self.from_addr.clone(),
        );

@@ -413,7 +395,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                to.push(Address::new_mailbox(addr.clone()));
            } else {
                to.push(Address::new_mailbox_with_name(
-                    name.to_string(),
+                    dc_encode_header_words(name),
                    addr.clone(),
                ));
            }
@@ -462,13 +444,14 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
        }

        let min_verified = self.min_verified();
+        let do_gossip = self.should_do_gossip();
        let grpimage = self.grpimage();
        let force_plaintext = self.should_force_plaintext();
        let subject_str = self.subject_str();
        let e2ee_guranteed = self.is_e2ee_guranteed();
        let mut encrypt_helper = EncryptHelper::new(self.context)?;

-        let subject = encode_words(&subject_str);
+        let subject = dc_encode_header_words(subject_str);

        let mut message = match self.loaded {
            Loaded::Message => {
@@ -477,7 +460,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
            Loaded::MDN => self.render_mdn()?,
        };

-        if force_plaintext != ForcePlaintext::NoAutocryptHeader as i32 {
+        if force_plaintext != DC_FP_NO_AUTOCRYPT_HEADER {
            // unless determined otherwise we add the Autocrypt header
            let aheader = encrypt_helper.get_aheader().to_string();
            unprotected_headers.push(Header::new("Autocrypt".into(), aheader));
@@ -490,46 +473,32 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
            encrypt_helper.should_encrypt(self.context, e2ee_guranteed, &peerstates)?;
        let is_encrypted = should_encrypt && force_plaintext == 0;

+        // Add gossip headers
+        if do_gossip {
+            for peerstate in peerstates.iter().filter_map(|(state, _)| state.as_ref()) {
+                if peerstate.peek_key(min_verified).is_some() {
+                    if let Some(header) = peerstate.render_gossip_header(min_verified) {
+                        protected_headers.push(Header::new("Autocrypt-Gossip".into(), header));
+                    }
+                }
+            }
+        }
+
        let rfc724_mid = match self.loaded {
            Loaded::Message => self.msg.rfc724_mid.clone(),
            Loaded::MDN => dc_create_outgoing_rfc724_mid(None, &self.from_addr),
        };

-        // we could also store the message-id in the protected headers
-        // which would probably help to survive providers like
-        // Outlook.com or hotmail which mangle the Message-ID.
-        // but they also strip the Autocrypt header so we probably
-        // never get a chance to tunnel our protected headers in a
-        // cryptographic payload.
-        unprotected_headers.push(Header::new(
-            "Message-ID".into(),
-            render_rfc724_mid(&rfc724_mid),
-        ));
+        protected_headers.push(Header::new("Message-ID".into(), rfc724_mid.clone()));

        unprotected_headers.push(Header::new_with_value("To".into(), to).unwrap());
        unprotected_headers.push(Header::new_with_value("From".into(), vec![from]).unwrap());

-        let mut is_gossiped = false;
-
        let outer_message = if is_encrypted {
-            // Add gossip headers in chats with multiple recipients
-            if peerstates.len() > 1 && self.should_do_gossip() {
-                for peerstate in peerstates.iter().filter_map(|(state, _)| state.as_ref()) {
-                    if peerstate.peek_key(min_verified).is_some() {
-                        if let Some(header) = peerstate.render_gossip_header(min_verified) {
-                            message =
-                                message.header(Header::new("Autocrypt-Gossip".into(), header));
-                            is_gossiped = true;
-                        }
-                    }
-                }
-            }
-
            // Store protected headers in the inner message.
            for header in protected_headers.into_iter() {
                message = message.header(header);
            }
-
            // Set the appropriate Content-Type for the inner message.
            let mut existing_ct = message
                .get_header("Content-Type".to_string())
@@ -555,12 +524,6 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                outer_message = outer_message.header(header);
            }

-            if std::env::var(crate::DCC_MIME_DEBUG).is_ok() {
-                info!(self.context, "mimefactory: outgoing message mime:");
-                let raw_message = message.clone().build().as_string();
-                println!("{}", raw_message);
-            }
-
            let encrypted =
                encrypt_helper.encrypt(self.context, min_verified, message, &peerstates)?;

@@ -600,6 +563,8 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
            message
        };

+        let is_gossiped = is_encrypted && do_gossip && !peerstates.is_empty();
+
        let MimeFactory {
            recipients_addr,
            from_addr,
@@ -636,7 +601,6 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
        let command = self.msg.param.get_cmd();
        let mut placeholdertext = None;
        let mut meta_part = None;
-        let mut add_compatibility_header = false;

        if chat.typ == Chattype::VerifiedGroup {
            protected_headers.push(Header::new("Chat-Verified".to_string(), "1".to_string()));
@@ -645,7 +609,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
        if chat.typ == Chattype::Group || chat.typ == Chattype::VerifiedGroup {
            protected_headers.push(Header::new("Chat-Group-ID".into(), chat.grpid.clone()));

-            let encoded = encode_words(&chat.name);
+            let encoded = dc_encode_header_words(&chat.name);
            protected_headers.push(Header::new("Chat-Group-Name".into(), encoded));

            match command {
@@ -677,7 +641,6 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                            "vg-member-added".to_string(),
                        ));
                    }
-                    add_compatibility_header = true;
                }
                SystemMessage::GroupNameChanged => {
                    let value_to_add = self.msg.param.get(Param::Arg).unwrap_or_default();
@@ -688,17 +651,10 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                    ));
                }
                SystemMessage::GroupImageChanged => {
-                    protected_headers.push(Header::new(
-                        "Chat-Content".to_string(),
-                        "group-avatar-changed".to_string(),
-                    ));
                    if grpimage.is_none() {
-                        protected_headers.push(Header::new(
-                            "Chat-Group-Avatar".to_string(),
-                            "0".to_string(),
-                        ));
+                        protected_headers
+                            .push(Header::new("Chat-Group-Image".to_string(), "0".to_string()));
                    }
-                    add_compatibility_header = true;
                }
                _ => {}
            }
@@ -761,34 +717,23 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
        if let Some(grpimage) = grpimage {
            info!(self.context, "setting group image '{}'", grpimage);
            let mut meta = Message::default();
-            meta.viewtype = Viewtype::Image;
+            meta.type_0 = Viewtype::Image;
            meta.param.set(Param::File, grpimage);

            let (mail, filename_as_sent) = build_body_file(context, &meta, "group-image")?;
            meta_part = Some(mail);
-            protected_headers.push(Header::new(
-                "Chat-Group-Avatar".into(),
-                filename_as_sent.clone(),
-            ));
-
-            // add the old group-image headers for versions <=0.973 resp. <=beta.15 (december 2019)
-            // image deletion is not supported in the compatibility layer.
-            // this can be removed some time after releasing 1.0,
-            // grep for #DeprecatedAvatar to get the place where compatibility parsing takes place.
-            if add_compatibility_header {
-                protected_headers.push(Header::new("Chat-Group-Image".into(), filename_as_sent));
-            }
+            protected_headers.push(Header::new("Chat-Group-Image".into(), filename_as_sent));
        }

-        if self.msg.viewtype == Viewtype::Sticker {
+        if self.msg.type_0 == Viewtype::Sticker {
            protected_headers.push(Header::new("Chat-Content".into(), "sticker".into()));
        }

-        if self.msg.viewtype == Viewtype::Voice
-            || self.msg.viewtype == Viewtype::Audio
-            || self.msg.viewtype == Viewtype::Video
+        if self.msg.type_0 == Viewtype::Voice
+            || self.msg.type_0 == Viewtype::Audio
+            || self.msg.type_0 == Viewtype::Video
        {
-            if self.msg.viewtype == Viewtype::Voice {
+            if self.msg.type_0 == Viewtype::Voice {
                protected_headers.push(Header::new("Chat-Voice-Message".into(), "1".into()));
            }
            let duration_ms = self.msg.param.get_int(Param::Duration).unwrap_or_default();
@@ -844,7 +789,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
            .body(message_text)];

        // add attachment part
-        if chat::msgtype_has_file(self.msg.viewtype) {
+        if chat::msgtype_has_file(self.msg.type_0) {
            if !is_file_size_okay(context, &self.msg) {
                bail!(
                    "Message exceeds the recommended {} MB.",
@@ -894,7 +839,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                            )
                            .header((
                                "Content-Disposition",
-                                "attachment; filename=\"location.kml\"",
+                                "attachment; filename=\"message.kml\"",
                            ))
                            .body(kml_content),
                    );
@@ -909,19 +854,6 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
            }
        }

-        if self.attach_selfavatar {
-            match context.get_config(Config::Selfavatar) {
-                Some(path) => match build_selfavatar_file(context, path) {
-                    Ok((part, filename)) => {
-                        parts.push(part);
-                        protected_headers.push(Header::new("Chat-User-Avatar".into(), filename))
-                    }
-                    Err(err) => warn!(context, "mimefactory: cannot attach selfavatar: {}", err),
-                },
-                None => protected_headers.push(Header::new("Chat-User-Avatar".into(), "0".into())),
-            }
-        }
-
        // Single part, render as regular message.
        if parts.len() == 1 {
            return Ok(parts.pop().unwrap());
@@ -939,7 +871,7 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
    /// Render an MDN
    fn render_mdn(&mut self) -> Result<PartBuilder, Error> {
        // RFC 6522, this also requires the `report-type` parameter which is equal
-        // to the MIME subtype of the second body part of the multipart/report
+        // to the MIME subtype of the second body part of the multipart/report */
        //
        // currently, we do not send MDNs encrypted:
        // - in a multi-device-setup that is not set up properly, MDNs would disturb the communication as they
@@ -1002,20 +934,6 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
    }
 }

-/// Returns base64-encoded buffer `buf` split into 78-bytes long
-/// chunks separated by CRLF.
-///
-/// This line length limit is an
-/// [RFC5322 requirement](https://tools.ietf.org/html/rfc5322#section-2.1.1).
-fn wrapped_base64_encode(buf: &[u8]) -> String {
-    let base64 = base64::encode(&buf);
-    let mut chars = base64.chars();
-    std::iter::repeat_with(|| chars.by_ref().take(78).collect::<String>())
-        .take_while(|s| !s.is_empty())
-        .collect::<Vec<_>>()
-        .join("\r\n")
-}
-
 fn build_body_file(
    context: &Context,
    msg: &Message,
@@ -1031,7 +949,7 @@ fn build_body_file(
    // not transfer the original filenames eg. for images; these names
    // are normally not needed and contain timestamps, running numbers
    // etc.
-    let filename_to_send: String = match msg.viewtype {
+    let filename_to_send: String = match msg.type_0 {
        Viewtype::Voice => chrono::Utc
            .timestamp(msg.timestamp_sort as i64, 0)
            .format(&format!("voice-message_%Y-%m-%d_%H-%M-%S.{}", &suffix))
@@ -1061,22 +979,24 @@ fn build_body_file(
        }
    };

+    let needs_ext = dc_needs_ext_header(&filename_to_send);
+
    // create mime part, for Content-Disposition, see RFC 2183.
    // `Content-Disposition: attachment` seems not to make a difference to `Content-Disposition: inline`
    // at least on tested Thunderbird and Gma'l in 2017.
    // But I've heard about problems with inline and outl'k, so we just use the attachment-type until we
    // run into other problems ...
-    let cd_value = if needs_encoding(&filename_to_send) {
+    let cd_value = if needs_ext {
+        format!("attachment; filename=\"{}\"", &filename_to_send)
+    } else {
        format!(
            "attachment; filename*=\"{}\"",
-            encode_words(&filename_to_send)
+            dc_encode_header_words(&filename_to_send)
        )
-    } else {
-        format!("attachment; filename=\"{}\"", &filename_to_send)
    };

    let body = std::fs::read(blob.to_abs_path())?;
-    let encoded_body = wrapped_base64_encode(&body);
+    let encoded_body = base64::encode(&body);

    let mail = PartBuilder::new()
        .content_type(&mimetype)
@@ -1087,31 +1007,6 @@ fn build_body_file(
    Ok((mail, filename_to_send))
 }

-fn build_selfavatar_file(context: &Context, path: String) -> Result<(PartBuilder, String), Error> {
-    let blob = BlobObject::from_path(context, path)?;
-    let filename_to_send = match blob.suffix() {
-        Some(suffix) => format!("avatar.{}", suffix),
-        None => "avatar".to_string(),
-    };
-    let mimetype = match message::guess_msgtype_from_suffix(blob.as_rel_path()) {
-        Some(res) => res.1.parse()?,
-        None => mime::APPLICATION_OCTET_STREAM,
-    };
-    let body = std::fs::read(blob.to_abs_path())?;
-    let encoded_body = wrapped_base64_encode(&body);
-
-    let part = PartBuilder::new()
-        .content_type(&mimetype)
-        .header((
-            "Content-Disposition",
-            format!("attachment; filename=\"{}\"", &filename_to_send),
-        ))
-        .header(("Content-Transfer-Encoding", "base64"))
-        .body(encoded_body);
-
-    Ok((part, filename_to_send))
-}
-
 pub(crate) fn vec_contains_lowercase(vec: &[String], part: &str) -> bool {
    let partlc = part.to_lowercase();
    for cur in vec.iter() {
@@ -1131,99 +1026,3 @@ fn is_file_size_okay(context: &Context, msg: &Message) -> bool {
        None => false,
    }
 }
-
-fn render_rfc724_mid(rfc724_mid: &str) -> String {
-    let rfc724_mid = rfc724_mid.trim().to_string();
-
-    if rfc724_mid.chars().nth(0).unwrap_or_default() == '<' {
-        rfc724_mid
-    } else {
-        format!("<{}>", rfc724_mid)
-    }
-}
-
-fn render_rfc724_mid_list(mid_list: &str) -> String {
-    mid_list
-        .trim()
-        .split_ascii_whitespace()
-        .map(render_rfc724_mid)
-        .collect::<Vec<String>>()
-        .join(" ")
-}
-
-/* ******************************************************************************
- * Encode/decode header words, RFC 2047
- ******************************************************************************/
-
-fn encode_words(word: &str) -> String {
-    encoded_words::encode(word, None, encoded_words::EncodingFlag::Shortest, None)
-}
-
-pub fn needs_encoding(to_check: impl AsRef<str>) -> bool {
-    let to_check = to_check.as_ref();
-
-    if to_check.is_empty() {
-        return false;
-    }
-
-    to_check.chars().any(|c| {
-        !c.is_ascii_alphanumeric() && c != '-' && c != '_' && c != '.' && c != '~' && c != '%'
-    })
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_render_email_address() {
-        let display_name = "ä space";
-        let addr = "x@y.org";
-
-        assert!(!display_name.is_ascii());
-
-        let s = format!(
-            "{}",
-            Address::new_mailbox_with_name(display_name.to_string(), addr.to_string())
-        );
-
-        println!("{}", s);
-
-        assert_eq!(s, "=?utf-8?q?=C3=A4_space?= <x@y.org>");
-    }
-
-    #[test]
-    fn test_render_rfc724_mid() {
-        assert_eq!(
-            render_rfc724_mid("kqjwle123@qlwe"),
-            "<kqjwle123@qlwe>".to_string()
-        );
-        assert_eq!(
-            render_rfc724_mid("  kqjwle123@qlwe "),
-            "<kqjwle123@qlwe>".to_string()
-        );
-        assert_eq!(
-            render_rfc724_mid("<kqjwle123@qlwe>"),
-            "<kqjwle123@qlwe>".to_string()
-        );
-    }
-
-    #[test]
-    fn test_render_rc724_mid_list() {
-        assert_eq!(render_rfc724_mid_list("123@q "), "<123@q>".to_string());
-        assert_eq!(render_rfc724_mid_list(" 123@q "), "<123@q>".to_string());
-        assert_eq!(
-            render_rfc724_mid_list("123@q 456@d "),
-            "<123@q> <456@d>".to_string()
-        );
-    }
-
-    #[test]
-    fn test_wrapped_base64_encode() {
-        let input = b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
-        let output =
-            "QUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQU\r\n\
-             FBQUFBQUFBQQ==";
-        assert_eq!(wrapped_base64_encode(input), output);
-    }
-}
--- a/src/mimeparser.rs
+++ b/src/mimeparser.rs
--- a/src/oauth2.rs
+++ b/src/oauth2.rs
@@ -154,7 +154,7 @@ pub fn dc_get_oauth2_access_token(
        }

        // ... and POST
-        let response = reqwest::blocking::Client::new()
+        let response = reqwest::Client::new()
            .post(post_url)
            .form(&post_param)
            .send();
@@ -165,7 +165,7 @@ pub fn dc_get_oauth2_access_token(
            );
            return None;
        }
-        let response = response.unwrap();
+        let mut response = response.unwrap();
        if !response.status().is_success() {
            warn!(
                context,
@@ -271,8 +271,7 @@ impl Oauth2 {
        {
            match domain {
                "gmail.com" | "googlemail.com" => Some(OAUTH2_GMAIL),
-                "yandex.com" | "yandex.by" | "yandex.kz" | "yandex.ru" | "yandex.ua" | "ya.ru"
-                | "narod.ru" => Some(OAUTH2_YANDEX),
+                "yandex.com" | "yandex.ru" | "yandex.ua" => Some(OAUTH2_YANDEX),
                _ => None,
            }
        } else {
@@ -291,12 +290,12 @@ impl Oauth2 {
        //   "verified_email": true,
        //   "picture": "https://lh4.googleusercontent.com/-Gj5jh_9R0BY/AAAAAAAAAAI/AAAAAAAAAAA/IAjtjfjtjNA/photo.jpg"
        // }
-        let response = reqwest::blocking::Client::new().get(&userinfo_url).send();
+        let response = reqwest::Client::new().get(&userinfo_url).send();
        if response.is_err() {
            warn!(context, "Error getting userinfo: {:?}", response);
            return None;
        }
-        let response = response.unwrap();
+        let mut response = response.unwrap();
        if !response.status().is_success() {
            warn!(context, "Error getting userinfo: {:?}", response.status());
            return None;
--- a/src/param.rs
+++ b/src/param.rs
@@ -16,104 +16,72 @@ use crate::mimeparser::SystemMessage;
 pub enum Param {
    /// For messages and jobs
    File = b'f',
-
    /// For Messages
    Width = b'w',
-
    /// For Messages
    Height = b'h',
-
    /// For Messages
    Duration = b'd',
-
    /// For Messages
    MimeType = b'm',
-
-    /// For Messages: message is encrypted, outgoing: guarantee E2EE or the message is not send
+    /// For Messages: message is encryoted, outgoing: guarantee E2EE or the message is not send
    GuaranteeE2ee = b'c',
-
    /// For Messages: decrypted with validation errors or without mutual set, if neither
    /// 'c' nor 'e' are preset, the messages is only transport encrypted.
    ErroneousE2ee = b'e',
-
    /// For Messages: force unencrypted message, either `ForcePlaintext::AddAutocryptHeader` (1),
    /// `ForcePlaintext::NoAutocryptHeader` (2) or 0.
    ForcePlaintext = b'u',
-
    /// For Messages
    WantsMdn = b'r',
-
    /// For Messages
    Forwarded = b'a',
-
    /// For Messages
    Cmd = b'S',
-
    /// For Messages
    Arg = b'E',
-
    /// For Messages
    Arg2 = b'F',
-
    /// For Messages
    Arg3 = b'G',
-
    /// For Messages
    Arg4 = b'H',
-
    /// For Messages
    Error = b'L',
-
-    /// For Messages
-    AttachGroupImage = b'A',
-
    /// For Messages: space-separated list of messaged IDs of forwarded copies.
    ///
-    /// This is used when a [crate::message::Message] is in the
-    /// [crate::message::MessageState::OutPending] state but is already forwarded.
+    /// This is used when a [Message] is in the
+    /// [MessageState::OutPending] state but is already forwarded.
    /// In this case the forwarded messages are written to the
    /// database and their message IDs are added to this parameter of
    /// the original message, which is also saved in the database.
    /// When the original message is then finally sent this parameter
    /// is used to also send all the forwarded messages.
    PrepForwards = b'P',
-
    /// For Jobs
    SetLatitude = b'l',
-
    /// For Jobs
    SetLongitude = b'n',
-
    /// For Jobs
    ServerFolder = b'Z',
-
    /// For Jobs
    ServerUid = b'z',
-
    /// For Jobs
    AlsoMove = b'M',
-
    /// For Jobs: space-separated list of message recipients
    Recipients = b'R',
-
    // For Groups
    Unpromoted = b'U',
-
    // For Groups and Contacts
    ProfileImage = b'i',
-
    // For Chats
    Selftalk = b'K',
-
    // For Chats
    Devicetalk = b'D',
-
    // For QR
    Auth = b's',
-
    // For QR
    GroupId = b'x',
-
    // For QR
    GroupName = b'g',
 }
@@ -224,11 +192,6 @@ impl Params {
        self.get(key).and_then(|s| s.parse().ok())
    }

-    /// Get the given parameter and parse as `bool`.
-    pub fn get_bool(&self, key: Param) -> Option<bool> {
-        self.get_int(key).map(|v| v != 0)
-    }
-
    /// Get the parameter behind `Param::Cmd` interpreted as `SystemMessage`.
    pub fn get_cmd(&self) -> SystemMessage {
        self.get_int(Param::Cmd)
@@ -259,7 +222,7 @@ impl Params {
            Some(val) => val,
            None => return Ok(None),
        };
-        ParamsFile::from_param(context, val).map(Some)
+        ParamsFile::from_param(context, val).map(|file| Some(file))
    }

    /// Gets the parameter and returns a [BlobObject] for it.
@@ -287,7 +250,7 @@ impl Params {
        let file = ParamsFile::from_param(context, val)?;
        let blob = match file {
            ParamsFile::FsPath(path) => match create {
-                true => BlobObject::new_from_path(context, path)?,
+                true => BlobObject::create_from_path(context, path)?,
                false => BlobObject::from_path(context, path)?,
            },
            ParamsFile::Blob(blob) => blob,
@@ -410,7 +373,7 @@ mod tests {
        if let ParamsFile::FsPath(p) = ParamsFile::from_param(&t.ctx, "/foo/bar/baz").unwrap() {
            assert_eq!(p, Path::new("/foo/bar/baz"));
        } else {
-            panic!("Wrong enum variant");
+            assert!(false, "Wrong enum variant");
        }
    }

@@ -420,7 +383,7 @@ mod tests {
        if let ParamsFile::Blob(b) = ParamsFile::from_param(&t.ctx, "$BLOBDIR/foo").unwrap() {
            assert_eq!(b.as_name(), "$BLOBDIR/foo");
        } else {
-            panic!("Wrong enum variant");
+            assert!(false, "Wrong enum variant");
        }
    }

--- a/src/peerstate.rs
+++ b/src/peerstate.rs
@@ -5,6 +5,7 @@ use std::fmt;
 use num_traits::FromPrimitive;

 use crate::aheader::*;
+use crate::chat::*;
 use crate::constants::*;
 use crate::context::Context;
 use crate::key::*;
@@ -94,7 +95,6 @@ pub enum ToSave {
 pub enum DegradeEvent {
    /// Recoverable by an incoming encrypted mail.
    EncryptionPaused = 0x01,
-
    /// Recoverable by a new verify.
    FingerprintChanged = 0x02,
 }
@@ -417,6 +417,7 @@ impl<'a> Peerstate<'a> {
                    &self.addr,
                ],
            )?;
+            reset_gossiped_timestamp(self.context, 0);
        } else if self.to_save == Some(ToSave::Timestamps) {
            sql::execute(
                self.context,
--- a/src/pgp.rs
+++ b/src/pgp.rs
@@ -16,7 +16,7 @@ use pgp::types::{
 };
 use rand::{thread_rng, CryptoRng, Rng};

-use crate::error::Result;
+use crate::error::Error;
 use crate::key::*;
 use crate::keyring::*;

@@ -88,7 +88,9 @@ impl<'a> PublicKeyTrait for SignedPublicKeyOrSubkey<'a> {
 /// Split data from PGP Armored Data as defined in https://tools.ietf.org/html/rfc4880#section-6.2.
 ///
 /// Returns (type, headers, base64 encoded body).
-pub fn split_armored_data(buf: &[u8]) -> Result<(BlockType, BTreeMap<String, String>, Vec<u8>)> {
+pub fn split_armored_data(
+    buf: &[u8],
+) -> Result<(BlockType, BTreeMap<String, String>, Vec<u8>), Error> {
    use std::io::Read;

    let cursor = Cursor::new(buf);
@@ -192,7 +194,7 @@ pub fn pk_encrypt(
    plain: &[u8],
    public_keys_for_encryption: &Keyring,
    private_key_for_signing: Option<&Key>,
-) -> Result<String> {
+) -> Result<String, Error> {
    let lit_msg = Message::new_literal_bytes("", plain);
    let pkeys: Vec<SignedPublicKeyOrSubkey> = public_keys_for_encryption
        .keys()
@@ -228,13 +230,12 @@ pub fn pk_encrypt(
    Ok(encoded_msg)
 }

-#[allow(clippy::implicit_hasher)]
 pub fn pk_decrypt(
    ctext: &[u8],
    private_keys_for_decryption: &Keyring,
    public_keys_for_validation: &Keyring,
    ret_signature_fingerprints: Option<&mut HashSet<String>>,
-) -> Result<Vec<u8>> {
+) -> Result<Vec<u8>, Error> {
    let (msg, _) = Message::from_armor_single(Cursor::new(ctext))?;
    let skeys: Vec<&SignedSecretKey> = private_keys_for_decryption
        .keys()
@@ -246,7 +247,7 @@ pub fn pk_decrypt(
        .collect();

    let (decryptor, _) = msg.decrypt(|| "".into(), || "".into(), &skeys[..])?;
-    let msgs = decryptor.collect::<pgp::errors::Result<Vec<_>>>()?;
+    let msgs = decryptor.collect::<Result<Vec<_>, _>>()?;
    ensure!(!msgs.is_empty(), "No valid messages found");

    let dec_msg = &msgs[0];
@@ -278,7 +279,7 @@ pub fn pk_decrypt(
 }

 /// Symmetric encryption.
-pub fn symm_encrypt(passphrase: &str, plain: &[u8]) -> Result<String> {
+pub fn symm_encrypt(passphrase: &str, plain: &[u8]) -> Result<String, Error> {
    let mut rng = thread_rng();
    let lit_msg = Message::new_literal_bytes("", plain);

@@ -295,11 +296,11 @@ pub fn symm_encrypt(passphrase: &str, plain: &[u8]) -> Result<String> {
 pub fn symm_decrypt<T: std::io::Read + std::io::Seek>(
    passphrase: &str,
    ctext: T,
-) -> Result<Vec<u8>> {
+) -> Result<Vec<u8>, Error> {
    let (enc_msg, _) = Message::from_armor_single(ctext)?;
    let decryptor = enc_msg.decrypt_with_password(|| passphrase.into())?;

-    let msgs = decryptor.collect::<pgp::errors::Result<Vec<_>>>()?;
+    let msgs = decryptor.collect::<Result<Vec<_>, _>>()?;
    ensure!(!msgs.is_empty(), "No valid messages found");

    match msgs[0].get_content()? {
--- a/src/qr.rs
+++ b/src/qr.rs
@@ -69,7 +69,7 @@ fn decode_openpgp(context: &Context, qr: &str) -> Lot {
        (fp, &rest[1..])
    }) {
        Some(pair) => pair,
-        None => (payload, ""),
+        None => return format_err!("Invalid OPENPGP4FPR found").into(),
    };

    // replace & with \n to match expected param format
@@ -83,11 +83,11 @@ fn decode_openpgp(context: &Context, qr: &str) -> Lot {

    let addr = if let Some(addr) = param.get(Param::Forwarded) {
        match normalize_address(addr) {
-            Ok(addr) => Some(addr),
+            Ok(addr) => addr,
            Err(err) => return err.into(),
        }
    } else {
-        None
+        return format_err!("Missing address").into();
    };

    // what is up with that param name?
@@ -157,7 +157,7 @@ fn decode_openpgp(context: &Context, qr: &str) -> Lot {
            lot.state = LotState::QrFprWithoutAddr;
            lot.text1 = Some(dc_format_fingerprint(&fingerprint));
        }
-    } else if let Some(addr) = addr {
+    } else {
        if grpid.is_some() && grpname.is_some() {
            lot.state = LotState::QrAskVerifyGroup;
            lot.text1 = grpname;
@@ -172,8 +172,6 @@ fn decode_openpgp(context: &Context, qr: &str) -> Lot {
        lot.fingerprint = Some(fingerprint);
        lot.invitenumber = invitenumber;
        lot.auth = auth;
-    } else {
-        return format_err!("Missing address").into();
    }

    lot
@@ -473,24 +471,4 @@ mod tests {
        assert_eq!(contact.get_addr(), "cli@deltachat.de");
        assert_eq!(contact.get_name(), "Jörn P. P.");
    }
-
-    #[test]
-    fn test_decode_openpgp_without_addr() {
-        let ctx = dummy_context();
-
-        let res = check_qr(
-            &ctx.ctx,
-            "OPENPGP4FPR:1234567890123456789012345678901234567890",
-        );
-        assert_eq!(res.get_state(), LotState::QrFprWithoutAddr);
-        assert_eq!(
-            res.get_text1().unwrap(),
-            "1234 5678 9012 3456 7890\n1234 5678 9012 3456 7890"
-        );
-        assert_eq!(res.get_id(), 0);
-
-        let res = check_qr(&ctx.ctx, "OPENPGP4FPR:12345678901234567890");
-        assert_eq!(res.get_state(), LotState::QrError);
-        assert_eq!(res.get_id(), 0);
-    }
 }
--- a/src/securejoin.rs
+++ b/src/securejoin.rs
@@ -11,7 +11,6 @@ use crate::context::Context;
 use crate::e2ee::*;
 use crate::error::Error;
 use crate::events::Event;
-use crate::headerdef::HeaderDef;
 use crate::key::*;
 use crate::lot::LotState;
 use crate::message::Message;
@@ -258,7 +257,7 @@ fn send_handshake_msg(
    grpid: impl AsRef<str>,
 ) {
    let mut msg = Message::default();
-    msg.viewtype = Viewtype::Text;
+    msg.type_0 = Viewtype::Text;
    msg.text = Some(format!("Secure-Join: {}", step));
    msg.hidden = true;
    msg.param.set_cmd(SystemMessage::SecurejoinMessage);
@@ -341,7 +340,7 @@ impl Default for HandshakeMessageStatus {
 /// Handle incoming secure-join handshake.
 pub(crate) fn handle_securejoin_handshake(
    context: &Context,
-    mimeparser: &MimeMessage,
+    mimeparser: &MimeParser,
    contact_id: u32,
 ) -> Result<HandshakeMessageStatus, Error> {
    let own_fingerprint: String;
@@ -351,7 +350,7 @@ pub(crate) fn handle_securejoin_handshake(
        "handle_securejoin_handshake(): called with special contact id"
    );
    let step = mimeparser
-        .get(HeaderDef::SecureJoin)
+        .lookup_field("Secure-Join")
        .ok_or_else(|| format_err!("This message is not a Secure-Join message"))?;

    info!(
@@ -379,7 +378,7 @@ pub(crate) fn handle_securejoin_handshake(
            // it just ensures, we have Bobs key now. If we do _not_ have the key because eg. MitM has removed it,
            // send_message() will fail with the error "End-to-end-encryption unavailable unexpectedly.", so, there is no additional check needed here.
            // verify that the `Secure-Join-Invitenumber:`-header matches invitenumber written to the QR code
-            let invitenumber = match mimeparser.get(HeaderDef::SecureJoinInvitenumber) {
+            let invitenumber = match mimeparser.lookup_field("Secure-Join-Invitenumber") {
                Some(n) => n,
                None => {
                    warn!(context, "Secure-join denied (invitenumber missing).",);
@@ -423,7 +422,7 @@ pub(crate) fn handle_securejoin_handshake(
                could_not_establish_secure_connection(
                    context,
                    contact_chat_id,
-                    if mimeparser.was_encrypted() {
+                    if mimeparser.encrypted {
                        "No valid signature."
                    } else {
                        "Not encrypted."
@@ -468,7 +467,7 @@ pub(crate) fn handle_securejoin_handshake(
            ====  Step 6 in "Out-of-band verified groups" protocol  ====
            ============================================================ */
            // verify that Secure-Join-Fingerprint:-header matches the fingerprint of Bob
-            let fingerprint = match mimeparser.get(HeaderDef::SecureJoinFingerprint) {
+            let fingerprint = match mimeparser.lookup_field("Secure-Join-Fingerprint") {
                Some(fp) => fp,
                None => {
                    could_not_establish_secure_connection(
@@ -497,7 +496,7 @@ pub(crate) fn handle_securejoin_handshake(
            }
            info!(context, "Fingerprint verified.",);
            // verify that the `Secure-Join-Auth:`-header matches the secret written to the QR code
-            let auth_0 = match mimeparser.get(HeaderDef::SecureJoinAuth) {
+            let auth_0 = match mimeparser.lookup_field("Secure-Join-Auth") {
                Some(auth) => auth,
                None => {
                    could_not_establish_secure_connection(
@@ -527,17 +526,19 @@ pub(crate) fn handle_securejoin_handshake(
            inviter_progress!(context, contact_id, 600);
            if join_vg {
                let field_grpid = mimeparser
-                    .get(HeaderDef::SecureJoinGroup)
+                    .lookup_field("Secure-Join-Group")
                    .map(|s| s.as_str())
                    .unwrap_or_else(|| "");
                let (group_chat_id, _, _) = chat::get_chat_id_by_grpid(context, field_grpid);
                if group_chat_id == 0 {
                    error!(context, "Chat {} not found.", &field_grpid);
                    return Ok(ret);
-                } else if let Err(err) =
-                    chat::add_contact_to_chat_ex(context, group_chat_id, contact_id, true)
-                {
-                    error!(context, "failed to add contact: {}", err);
+                } else {
+                    if let Err(err) =
+                        chat::add_contact_to_chat_ex(context, group_chat_id, contact_id, true)
+                    {
+                        error!(context, "failed to add contact: {}", err);
+                    }
                }
            } else {
                send_handshake_msg(context, contact_chat_id, "vc-contact-confirm", "", None, "");
@@ -601,10 +602,10 @@ pub(crate) fn handle_securejoin_handshake(
            Contact::scaleup_origin_by_id(context, contact_id, Origin::SecurejoinJoined);
            emit_event!(context, Event::ContactsChanged(None));
            let cg_member_added = mimeparser
-                .get(HeaderDef::ChatGroupMemberAdded)
+                .lookup_field("Chat-Group-Member-Added")
                .map(|s| s.as_str())
                .unwrap_or_else(|| "");
-            if join_vg && !context.is_self_addr(cg_member_added)? {
+            if join_vg && !addr_equals_self(context, cg_member_added) {
                info!(context, "Message belongs to a different handshake (scaled up contact anyway to allow creation of group).");
                return Ok(ret);
            }
@@ -636,13 +637,13 @@ pub(crate) fn handle_securejoin_handshake(
                inviter_progress!(context, contact_id, 800);
                inviter_progress!(context, contact_id, 1000);
                let field_grpid = mimeparser
-                    .get(HeaderDef::SecureJoinGroup)
+                    .lookup_field("Secure-Join-Group")
                    .map(|s| s.as_str())
                    .unwrap_or_else(|| "");
                let (group_chat_id, _, _) = chat::get_chat_id_by_grpid(context, &field_grpid);
                context.call_cb(Event::SecurejoinMemberAdded {
                    chat_id: group_chat_id,
-                    contact_id,
+                    contact_id: contact_id,
                });
            } else {
                warn!(context, "vg-member-added-received invalid.",);
@@ -717,8 +718,8 @@ fn mark_peer_as_verified(context: &Context, fingerprint: impl AsRef<str>) -> Res
 * Tools: Misc.
 ******************************************************************************/

-fn encrypted_and_signed(mimeparser: &MimeMessage, expected_fingerprint: impl AsRef<str>) -> bool {
-    if !mimeparser.was_encrypted() {
+fn encrypted_and_signed(mimeparser: &MimeParser, expected_fingerprint: impl AsRef<str>) -> bool {
+    if !mimeparser.encrypted {
        warn!(mimeparser.context, "Message not encrypted.",);
        false
    } else if mimeparser.signatures.is_empty() {
--- a/src/simplify.rs
+++ b/src/simplify.rs
@@ -1,251 +0,0 @@
-/// Remove standard (RFC 3676, §4.3) footer if it is found.
-fn remove_message_footer<'a>(lines: &'a [&str]) -> &'a [&'a str] {
-    for (ix, &line) in lines.iter().enumerate() {
-        // quoted-printable may encode `-- ` to `-- =20` which is converted
-        // back to `--  `
-        match line {
-            "-- " | "--  " => return &lines[..ix],
-            _ => (),
-        }
-    }
-    lines
-}
-
-/// Remove nonstandard footer and a boolean indicating whether such
-/// footer was removed.
-fn remove_nonstandard_footer<'a>(lines: &'a [&str]) -> (&'a [&'a str], bool) {
-    for (ix, &line) in lines.iter().enumerate() {
-        if line == "--"
-            || line == "---"
-            || line == "----"
-            || line.starts_with("-----")
-            || line.starts_with("_____")
-            || line.starts_with("=====")
-            || line.starts_with("*****")
-            || line.starts_with("~~~~~")
-        {
-            return (&lines[..ix], true);
-        }
-    }
-    (lines, false)
-}
-
-fn split_lines(buf: &str) -> Vec<&str> {
-    buf.split('\n').collect()
-}
-
-/// Simplify message text for chat display.
-/// Remove quotes, signatures, trailing empty lines etc.
-pub fn simplify(mut input: String, is_chat_message: bool) -> (String, bool) {
-    input.retain(|c| c != '\r');
-    let lines = split_lines(&input);
-    let (lines, is_forwarded) = skip_forward_header(&lines);
-
-    let lines = remove_message_footer(lines);
-    let (lines, has_nonstandard_footer) = remove_nonstandard_footer(lines);
-    let (lines, has_bottom_quote) = if !is_chat_message {
-        remove_bottom_quote(lines)
-    } else {
-        (lines, false)
-    };
-    let (lines, has_top_quote) = if !is_chat_message {
-        remove_top_quote(lines)
-    } else {
-        (lines, false)
-    };
-
-    // re-create buffer from the remaining lines
-    let text = render_message(
-        lines,
-        has_top_quote,
-        has_nonstandard_footer || has_bottom_quote,
-    );
-    (text, is_forwarded)
-}
-
-/// Skips "forwarded message" header.
-/// Returns message body lines and a boolean indicating whether
-/// a message is forwarded or not.
-fn skip_forward_header<'a>(lines: &'a [&str]) -> (&'a [&'a str], bool) {
-    if lines.len() >= 3
-        && lines[0] == "---------- Forwarded message ----------"
-        && lines[1].starts_with("From: ")
-        && lines[2].is_empty()
-    {
-        (&lines[3..], true)
-    } else {
-        (lines, false)
-    }
-}
-
-fn remove_bottom_quote<'a>(lines: &'a [&str]) -> (&'a [&'a str], bool) {
-    let mut last_quoted_line = None;
-    for (l, line) in lines.iter().enumerate().rev() {
-        if is_plain_quote(line) {
-            last_quoted_line = Some(l)
-        } else if !is_empty_line(line) {
-            break;
-        }
-    }
-    if let Some(mut l_last) = last_quoted_line {
-        if l_last > 1 && is_empty_line(lines[l_last - 1]) {
-            l_last -= 1
-        }
-        if l_last > 1 {
-            let line = lines[l_last - 1];
-            if is_quoted_headline(line) {
-                l_last -= 1
-            }
-        }
-        (&lines[..l_last], true)
-    } else {
-        (lines, false)
-    }
-}
-
-fn remove_top_quote<'a>(lines: &'a [&str]) -> (&'a [&'a str], bool) {
-    let mut last_quoted_line = None;
-    let mut has_quoted_headline = false;
-    for (l, line) in lines.iter().enumerate() {
-        if is_plain_quote(line) {
-            last_quoted_line = Some(l)
-        } else if !is_empty_line(line) {
-            if is_quoted_headline(line) && !has_quoted_headline && last_quoted_line.is_none() {
-                has_quoted_headline = true
-            } else {
-                /* non-quoting line found */
-                break;
-            }
-        }
-    }
-    if let Some(last_quoted_line) = last_quoted_line {
-        (&lines[last_quoted_line + 1..], true)
-    } else {
-        (lines, false)
-    }
-}
-
-fn render_message(lines: &[&str], is_cut_at_begin: bool, is_cut_at_end: bool) -> String {
-    let mut ret = String::new();
-    if is_cut_at_begin {
-        ret += "[...]";
-    }
-    /* we write empty lines only in case and non-empty line follows */
-    let mut pending_linebreaks = 0;
-    let mut empty_body = true;
-    for line in lines {
-        if is_empty_line(line) {
-            pending_linebreaks += 1
-        } else {
-            if !empty_body {
-                if pending_linebreaks > 2 {
-                    pending_linebreaks = 2
-                }
-                while 0 != pending_linebreaks {
-                    ret += "\n";
-                    pending_linebreaks -= 1
-                }
-            }
-            // the incoming message might contain invalid UTF8
-            ret += line;
-            empty_body = false;
-            pending_linebreaks = 1
-        }
-    }
-    if is_cut_at_end && (!is_cut_at_begin || !empty_body) {
-        ret += " [...]";
-    }
-    ret
-}
-
-/**
- * Tools
- */
-fn is_empty_line(buf: &str) -> bool {
-    // XXX: can it be simplified to buf.chars().all(|c| c.is_whitespace())?
-    //
-    // Strictly speaking, it is not equivalent (^A is not whitespace, but less than ' '),
-    // but having control sequences in email body?!
-    //
-    // See discussion at: https://github.com/deltachat/deltachat-core-rust/pull/402#discussion_r317062392
-    for c in buf.chars() {
-        if c > ' ' {
-            return false;
-        }
-    }
-
-    true
-}
-
-fn is_quoted_headline(buf: &str) -> bool {
-    /* This function may be called for the line _directly_ before a quote.
-    The function checks if the line contains sth. like "On 01.02.2016, xy@z wrote:" in various languages.
-    - Currently, we simply check if the last character is a ':'.
-    - Checking for the existence of an email address may fail (headlines may show the user's name instead of the address) */
-
-    buf.len() <= 80 && buf.ends_with(':')
-}
-
-fn is_plain_quote(buf: &str) -> bool {
-    buf.starts_with('>')
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use proptest::prelude::*;
-
-    proptest! {
-        #[test]
-        // proptest does not support [[:graphical:][:space:]] regex.
-        fn test_simplify_plain_text_fuzzy(input in "[!-~\t \n]+") {
-            let (output, _is_forwarded) = simplify(input, true);
-            assert!(output.split('\n').all(|s| s != "-- "));
-        }
-    }
-
-    #[test]
-    fn test_simplify_trim() {
-        let input = "line1\n\r\r\rline2".to_string();
-        let (plain, is_forwarded) = simplify(input, false);
-
-        assert_eq!(plain, "line1\nline2");
-        assert!(!is_forwarded);
-    }
-
-    #[test]
-    fn test_simplify_forwarded_message() {
-        let input = "---------- Forwarded message ----------\r\nFrom: test@example.com\r\n\r\nForwarded message\r\n-- \r\nSignature goes here".to_string();
-        let (plain, is_forwarded) = simplify(input, false);
-
-        assert_eq!(plain, "Forwarded message");
-        assert!(is_forwarded);
-    }
-
-    #[test]
-    fn test_simplify_utilities() {
-        assert!(is_empty_line(" \t"));
-        assert!(is_empty_line(""));
-        assert!(is_empty_line(" \r"));
-        assert!(!is_empty_line(" x"));
-        assert!(is_plain_quote("> hello world"));
-        assert!(is_plain_quote(">>"));
-        assert!(!is_plain_quote("Life is pain"));
-        assert!(!is_plain_quote(""));
-    }
-
-    #[test]
-    fn test_remove_top_quote() {
-        let (lines, has_top_quote) = remove_top_quote(&["> first", "> second"]);
-        assert!(lines.is_empty());
-        assert!(has_top_quote);
-
-        let (lines, has_top_quote) = remove_top_quote(&["> first", "> second", "not a quote"]);
-        assert_eq!(lines, &["not a quote"]);
-        assert!(has_top_quote);
-
-        let (lines, has_top_quote) = remove_top_quote(&["not a quote", "> first", "> second"]);
-        assert_eq!(lines, &["not a quote", "> first", "> second"]);
-        assert!(!has_top_quote);
-    }
-}
--- a/src/smtp/mod.rs
+++ b/src/smtp/mod.rs
@@ -2,57 +2,42 @@

 pub mod send;

-use std::time::Duration;
+use lettre::smtp::client::net::*;
+use lettre::*;

-use async_smtp::smtp::client::net::*;
-use async_smtp::*;
+use failure::Fail;

 use crate::constants::*;
 use crate::context::Context;
 use crate::events::Event;
-use crate::login_param::{dc_build_tls, LoginParam};
+use crate::login_param::{dc_build_tls_config, LoginParam};
 use crate::oauth2::*;

-/// SMTP write and read timeout in seconds.
-const SMTP_TIMEOUT: u64 = 30;
-
 #[derive(Debug, Fail)]
 pub enum Error {
    #[fail(display = "Bad parameters")]
    BadParameters,
-
    #[fail(display = "Invalid login address {}: {}", address, error)]
    InvalidLoginAddress {
        address: String,
        #[cause]
-        error: error::Error,
+        error: lettre::error::Error,
    },
-
    #[fail(display = "SMTP failed to connect: {:?}", _0)]
-    ConnectionFailure(#[cause] smtp::error::Error),
-
+    ConnectionFailure(#[cause] lettre::smtp::error::Error),
    #[fail(display = "SMTP: failed to setup connection {:?}", _0)]
-    ConnectionSetupFailure(#[cause] smtp::error::Error),
-
+    ConnectionSetupFailure(#[cause] lettre::smtp::error::Error),
    #[fail(display = "SMTP: oauth2 error {:?}", _0)]
    Oauth2Error { address: String },
-
-    #[fail(display = "TLS error")]
-    Tls(#[cause] native_tls::Error),
-}
-
-impl From<native_tls::Error> for Error {
-    fn from(err: native_tls::Error) -> Error {
-        Error::Tls(err)
-    }
 }

 pub type Result<T> = std::result::Result<T, Error>;

-#[derive(Default, DebugStub)]
+#[derive(DebugStub)]
 pub struct Smtp {
    #[debug_stub(some = "SmtpTransport")]
-    transport: Option<smtp::SmtpTransport>,
+    transport: Option<lettre::smtp::SmtpTransport>,
+    transport_connected: bool,
    /// Email address we are sending from.
    from: Option<EmailAddress>,
 }
@@ -60,30 +45,31 @@ pub struct Smtp {
 impl Smtp {
    /// Create a new Smtp instances.
    pub fn new() -> Self {
-        Default::default()
+        Smtp {
+            transport: None,
+            transport_connected: false,
+            from: None,
+        }
    }

    /// Disconnect the SMTP transport and drop it entirely.
    pub fn disconnect(&mut self) {
-        if let Some(mut transport) = self.transport.take() {
-            async_std::task::block_on(transport.close()).ok();
+        if self.transport.is_none() || !self.transport_connected {
+            return;
        }
+
+        let mut transport = self.transport.take().unwrap();
+        transport.close();
+        self.transport_connected = false;
    }

-    /// Check whether we are connected.
+    /// Check if a connection already exists.
    pub fn is_connected(&self) -> bool {
-        self.transport
-            .as_ref()
-            .map(|t| t.is_connected())
-            .unwrap_or_default()
+        self.transport.is_some()
    }

-    /// Connect using the provided login params.
+    /// Connect using the provided login params
    pub fn connect(&mut self, context: &Context, lp: &LoginParam) -> Result<()> {
-        async_std::task::block_on(self.inner_connect(context, lp))
-    }
-
-    async fn inner_connect(&mut self, context: &Context, lp: &LoginParam) -> Result<()> {
        if self.is_connected() {
            warn!(context, "SMTP already connected.");
            return Ok(());
@@ -104,7 +90,7 @@ impl Smtp {
        let domain = &lp.send_server;
        let port = lp.send_port as u16;

-        let tls_config = dc_build_tls(lp.smtp_certificate_checks)?.into();
+        let tls_config = dc_build_tls_config(lp.smtp_certificate_checks);
        let tls_parameters = ClientTlsParameters::new(domain.to_string(), tls_config);

        let (creds, mechanism) = if 0 != lp.server_flags & (DC_LP_AUTH_OAUTH2 as i32) {
@@ -119,21 +105,21 @@ impl Smtp {
            }
            let user = &lp.send_user;
            (
-                smtp::authentication::Credentials::new(
+                lettre::smtp::authentication::Credentials::new(
                    user.to_string(),
                    access_token.unwrap_or_default(),
                ),
-                vec![smtp::authentication::Mechanism::Xoauth2],
+                vec![lettre::smtp::authentication::Mechanism::Xoauth2],
            )
        } else {
            // plain
            let user = lp.send_user.clone();
            let pw = lp.send_pw.clone();
            (
-                smtp::authentication::Credentials::new(user, pw),
+                lettre::smtp::authentication::Credentials::new(user, pw),
                vec![
-                    smtp::authentication::Mechanism::Plain,
-                    smtp::authentication::Mechanism::Login,
+                    lettre::smtp::authentication::Mechanism::Plain,
+                    lettre::smtp::authentication::Mechanism::Login,
                ],
            )
        };
@@ -141,31 +127,28 @@ impl Smtp {
        let security = if 0
            != lp.server_flags & (DC_LP_SMTP_SOCKET_STARTTLS | DC_LP_SMTP_SOCKET_PLAIN) as i32
        {
-            smtp::ClientSecurity::Opportunistic(tls_parameters)
+            lettre::smtp::ClientSecurity::Opportunistic(tls_parameters)
        } else {
-            smtp::ClientSecurity::Wrapper(tls_parameters)
+            lettre::smtp::ClientSecurity::Wrapper(tls_parameters)
        };

-        let client = smtp::SmtpClient::with_security((domain.as_str(), port), security)
-            .await
+        let client = lettre::smtp::SmtpClient::new((domain.as_str(), port), security)
            .map_err(Error::ConnectionSetupFailure)?;

        let client = client
            .smtp_utf8(true)
            .credentials(creds)
            .authentication_mechanism(mechanism)
-            .connection_reuse(smtp::ConnectionReuseParameters::ReuseUnlimited)
-            .timeout(Some(Duration::from_secs(SMTP_TIMEOUT)));
-
-        let mut trans = client.into_transport();
-        trans.connect().await.map_err(Error::ConnectionFailure)?;
+            .connection_reuse(lettre::smtp::ConnectionReuseParameters::ReuseUnlimited);
+        let mut trans = client.transport();
+        trans.connect().map_err(Error::ConnectionFailure)?;

        self.transport = Some(trans);
+        self.transport_connected = true;
        context.call_cb(Event::SmtpConnected(format!(
            "SMTP-LOGIN as {} ok",
            lp.send_user,
        )));
-
        Ok(())
    }
 }
--- a/src/smtp/send.rs
+++ b/src/smtp/send.rs
@@ -1,7 +1,7 @@
 //! # SMTP message sending

 use super::Smtp;
-use async_smtp::*;
+use lettre::*;

 use crate::context::Context;
 use crate::events::Event;
@@ -11,11 +11,9 @@ pub type Result<T> = std::result::Result<T, Error>;
 #[derive(Debug, Fail)]
 pub enum Error {
    #[fail(display = "Envelope error: {}", _0)]
-    EnvelopeError(#[cause] async_smtp::error::Error),
-
+    EnvelopeError(#[cause] lettre::error::Error),
    #[fail(display = "Send error: {}", _0)]
-    SendError(#[cause] async_smtp::smtp::error::Error),
-
+    SendError(#[cause] lettre::smtp::error::Error),
    #[fail(display = "SMTP has no transport")]
    NoTransport,
 }
@@ -23,7 +21,7 @@ pub enum Error {
 impl Smtp {
    /// Send a prepared mail to recipients.
    /// On successful send out Ok() is returned.
-    pub async fn send(
+    pub fn send(
        &mut self,
        context: &Context,
        recipients: Vec<EmailAddress>,
@@ -38,28 +36,29 @@ impl Smtp {
            .collect::<Vec<String>>()
            .join(",");

-        let envelope =
-            Envelope::new(self.from.clone(), recipients).map_err(Error::EnvelopeError)?;
-        let mail = SendableEmail::new(
-            envelope,
-            format!("{}", job_id), // only used for internal logging
-            message,
-        );
-
        if let Some(ref mut transport) = self.transport {
-            transport.send(mail).await.map_err(Error::SendError)?;
+            let envelope =
+                Envelope::new(self.from.clone(), recipients).map_err(Error::EnvelopeError)?;
+            let mail = SendableEmail::new(
+                envelope,
+                format!("{}", job_id), // only used for internal logging
+                message,
+            );
+
+            transport.send(mail).map_err(Error::SendError)?;

            context.call_cb(Event::SmtpMessageSent(format!(
                "Message len={} was smtp-sent to {}",
                message_len, recipients_display
            )));
+            self.transport_connected = true;
            Ok(())
        } else {
            warn!(
                context,
                "uh? SMTP has no transport, failed to send to {}", recipients_display
            );
-            Err(Error::NoTransport)
+            return Err(Error::NoTransport);
        }
    }
 }
--- a/src/sql.rs
+++ b/src/sql.rs
@@ -1,5 +1,7 @@
 //! # SQLite wrapper

+use failure::Fail;
+
 use std::collections::HashSet;
 use std::sync::{Arc, RwLock};
 use std::time::Duration;
@@ -7,7 +9,7 @@ use std::time::Duration;
 use rusqlite::{Connection, OpenFlags, Statement, NO_PARAMS};
 use thread_local_object::ThreadLocal;

-use crate::chat::{update_device_icon, update_saved_messages_icon};
+use crate::chat::update_saved_messages_icon;
 use crate::constants::ShowEmails;
 use crate::context::Context;
 use crate::dc_tools::*;
@@ -66,19 +68,13 @@ pub struct Sql {
    in_use: Arc<ThreadLocal<String>>,
 }

-impl Default for Sql {
-    fn default() -> Self {
-        Self {
+impl Sql {
+    pub fn new() -> Sql {
+        Sql {
            pool: RwLock::new(None),
            in_use: Arc::new(ThreadLocal::new()),
        }
    }
-}
-
-impl Sql {
-    pub fn new() -> Sql {
-        Self::default()
-    }

    pub fn is_open(&self) -> bool {
        self.pool.read().unwrap().is_some()
@@ -544,7 +540,8 @@ fn open(
        // --------------------------------------------------------------------

        let mut dbversion = dbversion_before_update;
-        let mut recalc_fingerprints = false;
+        let mut recalc_fingerprints = 0;
+        let mut update_file_paths = 0;
        let mut update_icons = false;

        if dbversion < 1 {
@@ -687,7 +684,7 @@ fn open(
                "CREATE INDEX acpeerstates_index4 ON acpeerstates (gossip_key_fingerprint);",
                params![],
            )?;
-            recalc_fingerprints = true;
+            recalc_fingerprints = 1;
            dbversion = 34;
            sql.set_raw_config_int(context, "dbversion", 34)?;
        }
@@ -709,6 +706,19 @@ fn open(
                "CREATE INDEX acpeerstates_index5 ON acpeerstates (verified_key_fingerprint);",
                params![],
            )?;
+            if dbversion_before_update == 34 {
+                // migrate database from the use of verified-flags to verified_key,
+                // _only_ version 34 (0.17.0) has the fields public_key_verified and gossip_key_verified
+                // this block can be deleted in half a year or so (created 5/2018)
+                sql.execute(
+                    "UPDATE acpeerstates SET verified_key=gossip_key, verified_key_fingerprint=gossip_key_fingerprint WHERE gossip_key_verified=2;",
+                    params![]
+                )?;
+                sql.execute(
+                    "UPDATE acpeerstates SET verified_key=public_key, verified_key_fingerprint=public_key_fingerprint WHERE public_key_verified=2;",
+                    params![]
+                )?;
+            }
            dbversion = 39;
            sql.set_raw_config_int(context, "dbversion", 39)?;
        }
@@ -721,6 +731,20 @@ fn open(
            dbversion = 40;
            sql.set_raw_config_int(context, "dbversion", 40)?;
        }
+        if dbversion < 41 {
+            info!(context, "[migration] v41");
+            update_file_paths = 1;
+            dbversion = 41;
+            sql.set_raw_config_int(context, "dbversion", 41)?;
+        }
+        if dbversion < 42 {
+            info!(context, "[migration] v42");
+            // older versions set the txt-field to the filenames, for debugging and fulltext search.
+            // to allow text+attachment compound messages, we need to reset these fields.
+            sql.execute("UPDATE msgs SET txt='' WHERE type!=10", params![])?;
+            dbversion = 42;
+            sql.set_raw_config_int(context, "dbversion", 42)?;
+        }
        if dbversion < 44 {
            info!(context, "[migration] v44");
            sql.execute("ALTER TABLE msgs ADD COLUMN mime_headers TEXT;", params![])?;
@@ -848,6 +872,7 @@ fn open(
            if exists_before_update && sql.get_raw_config_int(context, "bcc_self").is_none() {
                sql.set_raw_config_int(context, "bcc_self", 1)?;
            }
+            update_icons = true;
            sql.set_raw_config_int(context, "dbversion", 59)?;
        }
        if dbversion < 60 {
@@ -858,21 +883,12 @@ fn open(
            )?;
            sql.set_raw_config_int(context, "dbversion", 60)?;
        }
-        if dbversion < 61 {
-            info!(context, "[migration] v61");
-            sql.execute(
-                "ALTER TABLE contacts ADD COLUMN selfavatar_sent INTEGER DEFAULT 0;",
-                NO_PARAMS,
-            )?;
-            update_icons = true;
-            sql.set_raw_config_int(context, "dbversion", 61)?;
-        }

        // (2) updates that require high-level objects
        // (the structure is complete now and all objects are usable)
        // --------------------------------------------------------------------

-        if recalc_fingerprints {
+        if 0 != recalc_fingerprints {
            info!(context, "[migration] recalc fingerprints");
            sql.query_map(
                "SELECT addr FROM acpeerstates;",
@@ -890,9 +906,36 @@ fn open(
                },
            )?;
        }
+        if 0 != update_file_paths {
+            // versions before 2018-08 save the absolute paths in the database files at "param.f=";
+            // for newer versions, we copy files always to the blob directory and store relative paths.
+            // this snippet converts older databases and can be removed after some time.
+            info!(context, "[migration] update file paths");
+            let repl_from = sql
+                .get_raw_config(context, "backup_for")
+                .unwrap_or_else(|| context.get_blobdir().to_string_lossy().into());
+
+            let repl_from = dc_ensure_no_slash_safe(&repl_from);
+            sql.execute(
+                &format!(
+                    "UPDATE msgs SET param=replace(param, 'f={}/', 'f=$BLOBDIR/')",
+                    repl_from
+                ),
+                NO_PARAMS,
+            )?;
+
+            sql.execute(
+                &format!(
+                    "UPDATE chats SET param=replace(param, 'i={}/', 'i=$BLOBDIR/');",
+                    repl_from
+                ),
+                NO_PARAMS,
+            )?;
+
+            sql.set_raw_config(context, "backup_for", None)?;
+        }
        if update_icons {
            update_saved_messages_icon(context)?;
-            update_device_icon(context)?;
        }
    }

@@ -959,12 +1002,13 @@ pub fn get_rowid_with_conn(
    // the ORDER BY ensures, this function always returns the most recent id,
    // eg. if a Message-ID is split into different messages.
    let query = format!(
-        "SELECT id FROM {} WHERE {}=? ORDER BY id DESC",
+        "SELECT id FROM {} WHERE {}='{}' ORDER BY id DESC",
        table.as_ref(),
        field.as_ref(),
+        value.as_ref()
    );

-    match conn.query_row(&query, params![value.as_ref()], |row| row.get::<_, u32>(0)) {
+    match conn.query_row(&query, NO_PARAMS, |row| row.get::<_, u32>(0)) {
        Ok(id) => id,
        Err(err) => {
            error!(
@@ -1096,23 +1140,26 @@ pub fn housekeeping(context: &Context) {

                unreferenced_count += 1;

-                if let Ok(stats) = std::fs::metadata(entry.path()) {
-                    let recently_created =
-                        stats.created().is_ok() && stats.created().unwrap() > keep_files_newer_than;
-                    let recently_modified = stats.modified().is_ok()
-                        && stats.modified().unwrap() > keep_files_newer_than;
-                    let recently_accessed = stats.accessed().is_ok()
-                        && stats.accessed().unwrap() > keep_files_newer_than;
+                match std::fs::metadata(entry.path()) {
+                    Ok(stats) => {
+                        let recently_created = stats.created().is_ok()
+                            && stats.created().unwrap() > keep_files_newer_than;
+                        let recently_modified = stats.modified().is_ok()
+                            && stats.modified().unwrap() > keep_files_newer_than;
+                        let recently_accessed = stats.accessed().is_ok()
+                            && stats.accessed().unwrap() > keep_files_newer_than;

-                    if recently_created || recently_modified || recently_accessed {
-                        info!(
-                            context,
-                            "Housekeeping: Keeping new unreferenced file #{}: {:?}",
-                            unreferenced_count,
-                            entry.file_name(),
-                        );
-                        continue;
+                        if recently_created || recently_modified || recently_accessed {
+                            info!(
+                                context,
+                                "Housekeeping: Keeping new unreferenced file #{}: {:?}",
+                                unreferenced_count,
+                                entry.file_name(),
+                            );
+                            continue;
+                        }
                    }
+                    Err(_) => {}
                }
                info!(
                    context,
--- a/src/stock.rs
+++ b/src/stock.rs
@@ -5,14 +5,12 @@ use std::borrow::Cow;
 use strum::EnumProperty;
 use strum_macros::EnumProperty;

-use crate::blob::BlobObject;
 use crate::chat;
 use crate::constants::{Viewtype, DC_CONTACT_ID_SELF};
 use crate::contact::*;
 use crate::context::Context;
 use crate::error::Error;
 use crate::message::Message;
-use crate::param::Param;
 use crate::stock::StockMessage::{DeviceMessagesHint, WelcomeMessage};

 /// Stock strings
@@ -185,9 +183,6 @@ pub enum StockMessage {
                    Recipients don't need to install Delta Chat, visit websites or sign up anywhere - \
                    however, of course, if they like, you may point them to 👉 https://get.delta.chat"))]
    WelcomeMessage = 71,
-
-    #[strum(props(fallback = "Unknown Sender for this chat. See 'info' for more details."))]
-    UnknownSenderForChat = 72,
 }

 /*
@@ -198,7 +193,7 @@ impl StockMessage {
    /// Default untranslated strings for stock messages.
    ///
    /// These could be used in logging calls, so no logging here.
-    fn fallback(self) -> &'static str {
+    fn fallback(&self) -> &'static str {
        self.get_str("fallback").unwrap_or_default()
    }
 }
@@ -243,7 +238,7 @@ impl Context {
            .unwrap()
            .get(&(id as usize))
        {
-            Some(ref x) => Cow::Owned((*x).to_string()),
+            Some(ref x) => Cow::Owned(x.to_string()),
            None => Cow::Borrowed(id.fallback()),
        }
    }
@@ -342,13 +337,6 @@ impl Context {
    }

    pub fn update_device_chats(&self) -> Result<(), Error> {
-        // check for the LAST added device message - if it is present, we can skip message creation.
-        // this is worthwhile as this function is typically called
-        // by the ui on every probram start or even on every opening of the chatlist.
-        if chat::was_device_msg_ever_added(&self, "core-welcome")? {
-            return Ok(());
-        }
-
        // create saved-messages chat;
        // we do this only once, if the user has deleted the chat, he can recreate it manually.
        if !self.sql.get_raw_config_bool(&self, "self-chat-added") {
@@ -363,12 +351,6 @@ impl Context {
        msg.text = Some(self.stock_str(DeviceMessagesHint).to_string());
        chat::add_device_msg(&self, Some("core-about-device-chat"), Some(&mut msg))?;

-        let image = include_bytes!("../assets/welcome-image.jpg");
-        let blob = BlobObject::create(&self, "welcome-image.jpg".to_string(), image)?;
-        let mut msg = Message::new(Viewtype::Image);
-        msg.param.set(Param::File, blob.as_name());
-        chat::add_device_msg(&self, Some("core-welcome-image"), Some(&mut msg))?;
-
        let mut msg = Message::new(Viewtype::Text);
        msg.text = Some(self.stock_str(WelcomeMessage).to_string());
        chat::add_device_msg(&self, Some("core-welcome"), Some(&mut msg))?;
--- a/src/test_utils.rs
+++ b/src/test_utils.rs
@@ -2,6 +2,7 @@
 //!
 //! This module is only compiled for test runs.

+use libc::uintptr_t;
 use tempfile::{tempdir, TempDir};

 use crate::config::Config;
@@ -30,10 +31,10 @@ pub fn test_context(callback: Option<Box<ContextCallback>>) -> TestContext {
    let dbfile = dir.path().join("db.sqlite");
    let cb: Box<ContextCallback> = match callback {
        Some(cb) => cb,
-        None => Box::new(|_, _| ()),
+        None => Box::new(|_, _| 0),
    };
    let ctx = Context::new(cb, "FakeOs".into(), dbfile).unwrap();
-    TestContext { ctx, dir }
+    TestContext { ctx: ctx, dir: dir }
 }

 /// Return a dummy [TestContext].
@@ -45,13 +46,14 @@ pub fn dummy_context() -> TestContext {
    test_context(None)
 }

-pub fn logging_cb(_ctx: &Context, evt: Event) {
+pub fn logging_cb(_ctx: &Context, evt: Event) -> uintptr_t {
    match evt {
        Event::Info(msg) => println!("I: {}", msg),
        Event::Warning(msg) => println!("W: {}", msg),
        Event::Error(msg) => println!("E: {}", msg),
        _ => (),
    }
+    0
 }

 /// Creates Alice with a pre-generated keypair.
--- a/src/wrapmime.rs
+++ b/src/wrapmime.rs
@@ -0,0 +1,59 @@
+use mailparse::ParsedMail;
+
+use crate::error::Error;
+
+pub fn parse_message_id(message_id: &[u8]) -> Result<String, Error> {
+    let value = std::str::from_utf8(message_id)?;
+    let addrs = mailparse::addrparse(value)
+        .map_err(|err| format_err!("failed to parse message id {:?}", err))?;
+
+    if let Some(info) = addrs.extract_single_info() {
+        return Ok(info.addr);
+    }
+
+    bail!("could not parse message_id: {}", value);
+}
+
+/// Returns a reference to the encrypted payload and validates the autocrypt structure.
+pub fn get_autocrypt_mime<'a, 'b>(mail: &'a ParsedMail<'b>) -> Result<&'a ParsedMail<'b>, Error> {
+    ensure!(
+        mail.ctype.mimetype == "multipart/encrypted",
+        "Not a multipart/encrypted message: {}",
+        mail.ctype.mimetype
+    );
+    ensure!(
+        mail.subparts.len() == 2,
+        "Invalid Autocrypt Level 1 Mime Parts"
+    );
+
+    ensure!(
+        mail.subparts[0].ctype.mimetype == "application/pgp-encrypted",
+        "Invalid Autocrypt Level 1 version part: {:?}",
+        mail.subparts[0].ctype,
+    );
+
+    ensure!(
+        mail.subparts[1].ctype.mimetype == "application/octet-stream",
+        "Invalid Autocrypt Level 1 encrypted part: {:?}",
+        mail.subparts[1].ctype
+    );
+
+    Ok(&mail.subparts[1])
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse_message_id() {
+        assert_eq!(
+            parse_message_id(b"Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org").unwrap(),
+            "Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org"
+        );
+        assert_eq!(
+            parse_message_id(b"<Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org>").unwrap(),
+            "Mr.PRUe8HJBoaO.3whNvLCMFU0@testrun.org"
+        );
+    }
+}
--- a/test-data/image/avatar1000x1000.jpg
+++ b/test-data/image/avatar1000x1000.jpg
--- a/test-data/message/html_attach.eml
+++ b/test-data/message/html_attach.eml
@@ -1,25 +0,0 @@
-Chat-Disposition-Notification-To: tmp_6272287793210918@testrun.org
-Subject: =?utf-8?q?Chat=3A_File_=E2=80=93_test=2Ehtml?=
-Message-ID: Mr.XA6y3og8-az.WGbH9_dNcQx@testrun.org
-Date: Sat, 07 Dec 2019 19:00:27 +0000
-X-Mailer: Delta Chat Core 1.0.0-beta.12/DcFFI
-Chat-Version: 1.0
-To: <tmp_5890965001269692@testrun.org>
-From: "=?utf-8?q??=" <tmp_6272287793210918@testrun.org>
-Content-Type: multipart/mixed; boundary="mwkNRwaJw1M5n2xcr2ODfAqvTjcj9Z"
-
-
--mwkNRwaJw1M5n2xcr2ODfAqvTjcj9Z
-Content-Type: text/plain; charset=utf-8
-
-- 
-Sent with my Delta Chat Messenger: https://delta.chat
-
--mwkNRwaJw1M5n2xcr2ODfAqvTjcj9Z
-Content-Type: text/html
-Content-Disposition: attachment; filename="test.html"
-Content-Transfer-Encoding: base64
-
-PGh0bWw+PGJvZHk+dGV4dDwvYm9keT5kYXRh
-
--mwkNRwaJw1M5n2xcr2ODfAqvTjcj9Z--
--- a/test-data/message/mail_attach_txt.eml
+++ b/test-data/message/mail_attach_txt.eml
@@ -1,40 +0,0 @@
-From holger@merlinux.eu Sat Dec  7 11:53:58 2019
-Return-Path: <holger@merlinux.eu>
-X-Original-To: holger+test@merlinux.eu
-Delivered-To: holger+test@merlinux.eu
-Received: from [127.0.0.1] (localhost [127.0.0.1])
-	(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
-	(No client certificate requested)
-	by mail.merlinux.eu (Postfix) with ESMTPSA id 61825100531;
-	Sat,  7 Dec 2019 10:53:58 +0000 (UTC)
-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=merlinux.eu;
-	s=default; t=1575716038;
-	bh=xhaPssQzVOHRafcciTQqDnZ1Zi4GMwsmg9pHLH3i8P8=;
-	h=Date:From:To:Subject;
-	b=U4HxGDZ8RwLwRPFtIvRsb+x5BiyICnbbY2ZOGlZdLt12MuDTfiYi/phHiQUC402EY
-	 GXb8dYgYr5+0PDiPBa7dyt2VQLC/h9QRfOA82tb1vpJYC+KksSAH0nYQqJvs7XrqCN
-	 i95/jwZnsWrV7w72+xsrO5qPujIE68TmM5I9Cyec=
-Received: by beto.merlinux.eu (Postfix, from userid 1000)
-	id 229D3820070; Sat,  7 Dec 2019 11:53:58 +0100 (CET)
-Date: Sat, 7 Dec 2019 11:53:57 +0100
-From: holger krekel <holger@merlinux.eu>
-To: holger+test@merlinux.eu
-Subject: hello
-Message-ID: <20191207105357.GA6266@beto>
-MIME-Version: 1.0
-Content-Type: multipart/mixed; boundary="YiEDa0DAkWCtVeE4"
-Content-Disposition: inline
-
--YiEDa0DAkWCtVeE4
-Content-Type: text/plain; charset=us-ascii
-Content-Disposition: inline
-
-siehe anhang
-
--YiEDa0DAkWCtVeE4
-Content-Type: text/plain; charset=us-ascii
-Content-Disposition: attachment; filename="x.txt"
-
-hello
-
--YiEDa0DAkWCtVeE4--
--- a/test-data/message/mail_with_cc.txt
+++ b/test-data/message/mail_with_cc.txt
@@ -1,14 +0,0 @@
-Return-Path: <x@testrun.org>
-Received: from hq5.merlinux.eu
-	by hq5.merlinux.eu (Dovecot) with LMTP id yRKOBakcfV1AewAAPzvFDg
-	; Sat, 14 Sep 2019 19:00:25 +0200
-Received: from localhost (unknown 7.165.105.24])
-	by hq5.merlinux.eu (Postfix) with ESMTPSA id 8D9844E023;
-	Sat, 14 Sep 2019 19:00:22 +0200 (CEST)
-message-id: <2dfdbde7@example.org>
-Date: Sat, 14 Sep 2019 19:00:13 +0200
-From: lmn <x@tux.org>
-To: abc <abc@bcd.com>
-CC: def <Def@def.de>
-
-hi
--- a/test-data/message/mail_with_user_and_group_avatars.eml
+++ b/test-data/message/mail_with_user_and_group_avatars.eml
@@ -1,55 +0,0 @@
-Chat-Group-ID: WVnDtF5azch
-Chat-Group-Name: =?utf-8?q?testgr1?=
-Chat-Group-Avatar: group-image.png
-Chat-User-Avatar: avatar.png
-Subject: =?utf-8?q?Chat=3A_testgr1=3A_hi!_?=
-Date: Thu, 12 Dec 2019 17:24:03 +0000
-X-Mailer: Delta Chat Core 1.0.0-beta.15/CLI
-Chat-Version: 1.0
-Message-ID: <Gr.WVnDtF5azch.c6vUZfnnXYx@testrun.org>
-To: <bpetersen@b44t.com>
-From: =?utf-8?q??= <tunis4@testrun.org>
-Content-Type: multipart/mixed; boundary="LV8nfXkpyyn39fsVyoB1b29PKDMeb5"
-
-
--LV8nfXkpyyn39fsVyoB1b29PKDMeb5
-Content-Type: text/plain; charset=utf-8
-
-hi! 
-
-- 
-Sent with my Delta Chat Messenger: https://delta.chat
-
--LV8nfXkpyyn39fsVyoB1b29PKDMeb5
-Content-Type: image/png
-Content-Disposition: attachment; filename="group-image.png"
-Content-Transfer-Encoding: base64
-
-iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAIAAACQkWg2AAABhGlDQ1BJQ0MgcHJvZmlsZQAAKJF9kT
-1Iw0AYht+mSqVUHCwi4pChOlkQFXHUKhShQqgVWnUwufQPmjQkKS6OgmvBwZ/FqoOLs64OroIg+APi
-4uqk6CIlfpcUWsR4x3EP733vy913gNCoMM3qGgc03TbTyYSYza2KoVdEEMYATUFmljEnSSn4jq97BP
-h+F+dZ/nV/jl41bzEgIBLPMsO0iTeIpzdtg/M+cZSVZJX4nHjMpAsSP3Jd8fiNc9FlgWdGzUx6njhK
-LBY7WOlgVjI14inimKrplC9kPVY5b3HWKjXWuid/YSSvryxzndYwkljEEiSIUFBDGRXYiNOuk2IhTe
-cJH/+Q65fIpZCrDEaOBVShQXb94H/wu7dWYXLCS4okgO4Xx/kYAUK7QLPuON/HjtM8AYLPwJXe9lcb
-wMwn6fW2FjsC+raBi+u2puwBlzvA4JMhm7IrBWkJhQLwfkbflAP6b4Hwmte31jlOH4AM9Sp1AxwcAq
-NFyl73eXdPZ9/+rWn17wcR7HKATfSiTAAAAAlwSFlzAAAuIwAALiMBeKU/dgAAAAd0SU1FB+MMChYX
-Fh+1IOwAAAAZdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAGElEQVQoz2P858hAEm
-BiYBjVMKphuGoAAAO8AV+n297RAAAAAElFTkSuQmCC
-
--LV8nfXkpyyn39fsVyoB1b29PKDMeb5
-Content-Type: image/png
-Content-Disposition: attachment; filename="avatar.png"
-Content-Transfer-Encoding: base64
-
-iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAABhGlDQ1BJQ0MgcHJvZmlsZQAAKJF9kT
-1Iw0AcxV9TpUUqIhYRcchQnSyIFXHUKhShQqgVWnUwufQLmjQkKS6OgmvBwY/FqoOLs64OroIg+AHi
-4uqk6CIl/q8ptIjx4Lgf7+497t4BQr3MNKtrAtB020wl4mImuyoGXhFCEIOIoV9mljEnSUl4jq97+P
-h6F+VZ3uf+HL1qzmKATySeZYZpE28QT2/aBud94jAryirxOfG4SRckfuS64vIb50KTBZ4ZNtOpeeIw
-sVjoYKWDWdHUiKeII6qmU76QcVnlvMVZK1dZ6578haGcvrLMdZojSGARS5AgQkEVJZRhI0qrToqFFO
-3HPfzDTb9ELoVcJTByLKACDXLTD/4Hv7u18rFJNykUB7pfHOdjFAjsAo2a43wfO07jBPA/A1d621+p
-AzOfpNfaWuQI6NsGLq7bmrIHXO4AQ0+GbMpNyU9TyOeB9zP6piwwcAv0rLm9tfZx+gCkqavkDXBwCI
-wVKHvd493Bzt7+PdPq7wd6nHKqMKZUTAAAAANQTFRF/sYAhYATyAAAAAlwSFlzAAAuIwAALiMBeKU/
-dgAAAAd0SU1FB+MMCBY0D29+N8YAAAAZdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAA
-AADElEQVQI12NgIA0AAAAwAAHHqoWOAAAAAElFTkSuQmCC
-
--LV8nfXkpyyn39fsVyoB1b29PKDMeb5--
--- a/test-data/message/mail_with_user_avatar.eml
+++ b/test-data/message/mail_with_user_avatar.eml
@@ -1,37 +0,0 @@
-Chat-User-Avatar: avatar.png
-Subject: =?utf-8?q?Chat=3A_this_is_a_message_with_a_=2E=2E=2E?=
-Message-ID: Mr.wOBwZNbBTVt.NZpmQDwWoNk@example.org
-In-Reply-To: Mr.ETXqza5-WpB.zDEYOLECxAw@example.org
-Date: Sun, 08 Dec 2019 23:12:55 +0000
-X-Mailer: Delta Chat Core 1.0.0-beta.12/CLI
-Chat-Version: 1.0
-To: <tunis3@example.org>
-From: "=?utf-8?q??=" <tunis4@example.org>
-Content-Type: multipart/mixed; boundary="luTiGu6GBoVLCvTkzVtmZmwsmhkNMw"
-
-
--luTiGu6GBoVLCvTkzVtmZmwsmhkNMw
-Content-Type: text/plain; charset=utf-8
-
-this is a message with a profile-image attached
-
-- 
-Sent with my Delta Chat Messenger: https://delta.chat
-
--luTiGu6GBoVLCvTkzVtmZmwsmhkNMw
-Content-Type: image/png
-Content-Disposition: attachment; filename="avatar.png"
-Content-Transfer-Encoding: base64
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--luTiGu6GBoVLCvTkzVtmZmwsmhkNMw--
--- a/test-data/message/mail_with_user_avatar_deleted.eml
+++ b/test-data/message/mail_with_user_avatar_deleted.eml
@@ -1,14 +0,0 @@
-Content-Type: text/plain; charset=utf-8
-Chat-User-Avatar: 0
-Subject: =?utf-8?q?Chat=3A_profile_image_deleted?=
-Message-ID: Mr.tsgoJgn-cBf.0TkFWKJzeSp@example.org
-Date: Sun, 08 Dec 2019 23:28:30 +0000
-X-Mailer: Delta Chat Core 1.0.0-beta.12/CLI
-Chat-Version: 1.0
-To: <tunis3@example>
-From: "=?utf-8?q??=" <tunis4@example.org>
-
-profile image deleted
-
-- 
-Sent with my Delta Chat Messenger: https://delta.chat
--- a/tests/stress.rs
+++ b/tests/stress.rs
@@ -2,7 +2,9 @@

 use std::collections::HashSet;

+use deltachat::chat::{self, Chat};
 use deltachat::config;
+use deltachat::contact::*;
 use deltachat::context::*;
 use deltachat::keyring::*;
 use deltachat::pgp;
@@ -203,7 +205,9 @@ fn test_encryption_decryption() {
    assert_eq!(plain, original_text);
 }

-fn cb(_context: &Context, _event: Event) {}
+fn cb(_context: &Context, _event: Event) -> libc::uintptr_t {
+    0
+}

 #[allow(dead_code)]
 struct TestContext {
@@ -223,3 +227,20 @@ fn test_stress_tests() {
    let context = create_test_context();
    stress_functions(&context.ctx);
 }
+
+#[test]
+fn test_chat() {
+    let context = create_test_context();
+    let contact1 = Contact::create(&context.ctx, "bob", "bob@mail.de").unwrap();
+    assert_ne!(contact1, 0);
+
+    let chat_id = chat::create_by_contact_id(&context.ctx, contact1).unwrap();
+    assert!(chat_id > 9, "chat_id too small {}", chat_id);
+    let chat = Chat::load_from_db(&context.ctx, chat_id).unwrap();
+
+    let chat2_id = chat::create_by_contact_id(&context.ctx, contact1).unwrap();
+    assert_eq!(chat2_id, chat_id);
+    let chat2 = Chat::load_from_db(&context.ctx, chat2_id).unwrap();
+
+    assert_eq!(chat2.name, chat.name);
+}