Update deltachat-jsonrpc/src/api.rs

Co-authored-by: adb <asieldbenitez@gmail.com>

.github/workflows/deltachat-rpc-server.yml

@@ -382,7 +382,7 @@ jobs:
 
       - name: Publish deltachat-rpc-server to PyPI
         if: github.event_name == 'release'
-        uses: pypa/gh-action-pypi-publish@ed0c53931b1dc9bd32cbe73a98c7f6766f8a527e
+        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b
 
   publish_npm_package:
     name: Build & Publish npm prebuilds and deltachat-rpc-server

.github/workflows/publish-deltachat-rpc-client-pypi.yml

@@ -47,4 +47,4 @@ jobs:
           name: python-package-distributions
           path: dist/
       - name: Publish deltachat-rpc-client to PyPI
-        uses: pypa/gh-action-pypi-publish@ed0c53931b1dc9bd32cbe73a98c7f6766f8a527e
+        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b

.github/workflows/zizmor-scan.yml

@@ -23,4 +23,4 @@ jobs:
           persist-credentials: false
 
       - name: Run zizmor
-        uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2
+        uses: zizmorcore/zizmor-action@b1d7e1fb5de872772f31590499237e7cce841e8e # v0.5.3

Cargo.lock

@@ -3933,9 +3933,9 @@ checksum = "c08d65885ee38876c4f86fa503fb49d7b507c2b62552df7c70b2fce627e06381"
 
 [[package]]
 name = "openssl"
-version = "0.10.72"
+version = "0.10.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fedfea7d58a1f73118430a55da6a286e7b044961736ce96a16a17068ea25e5da"
+checksum = "f38c4372413cdaaf3cc79dd92d29d7d9f5ab09b51b10dded508fb90bb70b9222"
 dependencies = [
  "bitflags 2.11.0",
  "cfg-if",
@@ -3974,9 +3974,9 @@ dependencies = [
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.107"
+version = "0.9.114"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8288979acd84749c744a9014b4382d42b8f7b2592847b5afb2ed29e5d16ede07"
+checksum = "13ce1245cd07fcc4cfdb438f7507b0c7e4f3849a69fd84d52374c66d83741bb6"
 dependencies = [
  "cc",
  "libc",
@@ -5164,7 +5164,7 @@ dependencies = [
  "once_cell",
  "ring",
  "rustls-pki-types",
- "rustls-webpki 0.103.12",
+ "rustls-webpki 0.103.13",
  "subtle",
  "zeroize",
 ]
@@ -5201,9 +5201,9 @@ dependencies = [
 
 [[package]]
 name = "rustls-webpki"
-version = "0.103.12"
+version = "0.103.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8279bb85272c9f10811ae6a6c547ff594d6a7f3c6c6b02ee9726d1d0dcfcdd06"
+checksum = "61c429a8649f110dddef65e2a5ad240f747e85f7758a6bccc7e5777bd33f756e"
 dependencies = [
  "ring",
  "rustls-pki-types",

deltachat-ffi/deltachat.h

@@ -390,27 +390,9 @@ char*           dc_get_blobdir               (const dc_context_t* context);
 /**
  * Configure the context. The configuration is handled by key=value pairs as:
  *
- * - `addr`         = Email address to use for configuration.
- *                    If dc_configure() fails this is not the email address actually in use.
- *                    Use `configured_addr` to find out the email address actually in use.
- * - `configured_addr` = Email address actually in use.
+ * - `configured_addr` = Email address in use.
  *                    Unless for testing, do not set this value using dc_set_config().
  *                    Instead, set `addr` and call dc_configure().
- * - `mail_server`  = IMAP-server, guessed if left out
- * - `mail_user`    = IMAP-username, guessed if left out
- * - `mail_pw`      = IMAP-password (always needed)
- * - `mail_port`    = IMAP-port, guessed if left out
- * - `mail_security`= IMAP-socket, one of @ref DC_SOCKET, defaults to #DC_SOCKET_AUTO
- * - `send_server`  = SMTP-server, guessed if left out
- * - `send_user`    = SMTP-user, guessed if left out
- * - `send_pw`      = SMTP-password, guessed if left out
- * - `send_port`    = SMTP-port, guessed if left out
- * - `send_security`= SMTP-socket, one of @ref DC_SOCKET, defaults to #DC_SOCKET_AUTO
- * - `server_flags` = IMAP-/SMTP-flags as a combination of @ref DC_LP flags, guessed if left out
- * - `proxy_enabled` = Proxy enabled. Disabled by default.
- * - `proxy_url` = Proxy URL. May contain multiple URLs separated by newline, but only the first one is used.
- * - `imap_certificate_checks` = how to check IMAP certificates, one of the @ref DC_CERTCK flags, defaults to #DC_CERTCK_AUTO (0)
- * - `smtp_certificate_checks` = deprecated option, should be set to the same value as `imap_certificate_checks` but ignored by the new core
  * - `displayname`  = Own name to use when sending messages. MUAs are allowed to spread this way e.g. using CC, defaults to empty
  * - `selfstatus`   = Own status to display, e.g. in e-mail footers, defaults to empty
  * - `selfavatar`   = File containing avatar. Will immediately be copied to the 
@@ -513,6 +495,27 @@ char*           dc_get_blobdir               (const dc_context_t* context);
  *                       1 = Contacts (default, does not include contact requests),
  *                       2 = Nobody (calls never result in a notification).
  *
+ * Also, there are configs that are only needed
+ * if you want to use the deprecated dc_configure() API, such as:
+ *
+ * - `addr`         = Email address to use for configuration.
+ *                    If dc_configure() fails this is not the email address actually in use.
+ *                    Use `configured_addr` to find out the email address actually in use.
+ * - `mail_server`  = IMAP-server, guessed if left out
+ * - `mail_user`    = IMAP-username, guessed if left out
+ * - `mail_pw`      = IMAP-password (always needed)
+ * - `mail_port`    = IMAP-port, guessed if left out
+ * - `mail_security`= IMAP-socket, one of @ref DC_SOCKET, defaults to #DC_SOCKET_AUTO
+ * - `send_server`  = SMTP-server, guessed if left out
+ * - `send_user`    = SMTP-user, guessed if left out
+ * - `send_pw`      = SMTP-password, guessed if left out
+ * - `send_port`    = SMTP-port, guessed if left out
+ * - `send_security`= SMTP-socket, one of @ref DC_SOCKET, defaults to #DC_SOCKET_AUTO
+ * - `server_flags` = IMAP-/SMTP-flags as a combination of @ref DC_LP flags, guessed if left out
+ * - `proxy_enabled` = Proxy enabled. Disabled by default.
+ * - `proxy_url` = Proxy URL. May contain multiple URLs separated by newline, but only the first one is used.
+ * - `imap_certificate_checks` = how to check IMAP and SMTP certificates, one of the @ref DC_CERTCK flags, defaults to #DC_CERTCK_AUTO (0)
+
  * If you want to retrieve a value, use dc_get_config().
  *
  * @memberof dc_context_t
@@ -699,6 +702,12 @@ int              dc_get_push_state           (dc_context_t* context);
 
 /**
  * Configure a context.
+ *
+ * This way of configuring a context is deprecated,
+ * and does not allow to configure multiple transports.
+ * If you can, use the JSON-RPC API (../deltachat-jsonrpc/src/api.rs)
+ * `add_or_update_transport()`/`addOrUpdateTransport()` instead.
+ *
  * During configuration IO must not be started,
  * if needed stop IO using dc_accounts_stop_io() or dc_stop_io() first.
  * If the context is already configured,
@@ -2632,6 +2641,8 @@ dc_lot_t*       dc_check_qr                  (dc_context_t* context, const char*
  * so that the QR code is useful also without Delta Chat being installed
  * or can be passed to contacts through other channels.
  *
+ * To reset invitations, pass the link to dc_set_config_from_qr().
+ *
  * @memberof dc_context_t
  * @param context The context object.
  * @param chat_id If set to a group-chat-id,
@@ -5804,7 +5815,7 @@ int64_t         dc_lot_get_timestamp     (const dc_lot_t* lot);
  * These constants configure TLS certificate checks for IMAP and SMTP connections.
  *
  * These constants are set via dc_set_config()
- * using keys "imap_certificate_checks" and "smtp_certificate_checks".
+ * using key "imap_certificate_checks".
  *
  * @addtogroup DC_CERTCK
  * @{

deltachat-jsonrpc/src/api.rs

@@ -883,6 +883,8 @@ impl CommandApi {
 
     /// Get QR code text that will offer a [SecureJoin](https://securejoin.delta.chat/) invitation.
     ///
+    /// To reset invitations, pass the link to `set_config_from_qr()`.
+    ///
     /// If `chat_id` is a group chat ID, SecureJoin QR code for the group is returned.
     /// If `chat_id` is unset, setup contact QR code is returned.
     async fn get_chat_securejoin_qr_code(

deltachat-jsonrpc/src/lib.rs

@@ -85,7 +85,7 @@ mod tests {
             assert_eq!(result, response.to_owned());
         }
         {
-            let request = r#"{"jsonrpc":"2.0","method":"batch_set_config","id":2,"params":[1,{"addr":"","mail_user":"","mail_pw":"","mail_server":"","mail_port":"","mail_security":"","imap_certificate_checks":"","send_user":"","send_pw":"","send_server":"","send_port":"","send_security":"","smtp_certificate_checks":""}]}"#;
+            let request = r#"{"jsonrpc":"2.0","method":"batch_set_config","id":2,"params":[1,{"addr":"","mail_user":"","mail_pw":"","mail_server":"","mail_port":"","mail_security":"","imap_certificate_checks":"","send_user":"","send_pw":"","send_server":"","send_port":"","send_security":""}]}"#;
             let response = r#"{"jsonrpc":"2.0","id":2,"result":null}"#;
             session.handle_incoming(request).await;
             let result = receiver.recv().await?;

deltachat-rpc-client/tests/test_something.py

@@ -442,35 +442,6 @@ def test_reaction_seen_on_another_dev(acfactory) -> None:
     assert chat_id == alice2_chat_bob.id
 
 
-def test_2nd_device_events_when_msgs_are_seen(acfactory) -> None:
-    alice, bob = acfactory.get_online_accounts(2)
-    alice2 = alice.clone()
-    alice2.start_io()
-
-    # Get an accepted chat, otherwise alice2 won't be notified about the 2nd message.
-    chat_alice2 = alice2.create_chat(bob)
-    chat_id_alice2 = chat_alice2.get_basic_snapshot().id
-
-    chat_bob_alice = bob.create_chat(alice)
-    chat_bob_alice.send_text("Hello!")
-    msg_alice = alice.wait_for_incoming_msg()
-    assert alice2.wait_for_incoming_msg_event().chat_id == chat_id_alice2
-    chat_bob_alice.send_text("What's new?")
-    assert alice2.wait_for_incoming_msg_event().chat_id == chat_id_alice2
-    chat_alice2 = alice2.get_chat_by_id(chat_id_alice2)
-    assert chat_alice2.get_fresh_message_count() == 2
-
-    msg_alice.mark_seen()
-    assert alice2.wait_for_msgs_changed_event().chat_id == chat_id_alice2
-    assert chat_alice2.get_fresh_message_count() == 1
-
-    msg_id = alice.wait_for_msgs_changed_event().msg_id
-    msg = alice.get_message_by_id(msg_id)
-    msg.mark_seen()
-    assert alice2.wait_for_event(EventType.MSGS_NOTICED).chat_id == chat_id_alice2
-    assert chat_alice2.get_fresh_message_count() == 0
-
-
 def test_is_bot(acfactory) -> None:
     """Test that we can recognize messages submitted by bots."""
     alice, bob = acfactory.get_online_accounts(2)

deny.toml

@@ -27,7 +27,13 @@ ignore = [
     # <https://rustsec.org/advisories/RUSTSEC-2026-0099>
     "RUSTSEC-2026-0049",
     "RUSTSEC-2026-0098",
-    "RUSTSEC-2026-0099"
+    "RUSTSEC-2026-0099",
+
+    # Panic in CRL signature checks.
+    # We do not check CRL and cannot update rustls-webpki 0.102.8 
+    # which is a dependency of iroh 0.35.0.
+    # <https://rustsec.org/advisories/RUSTSEC-2026-0104>
+    "RUSTSEC-2026-0104"
 ]
 
 [bans]

python/src/deltachat/testplugin.py

@@ -433,7 +433,6 @@ class ACFactory:
         if self.pytestconfig.getoption("--strict-tls"):
             # Enable strict certificate checks for online accounts
             configdict["imap_certificate_checks"] = str(const.DC_CERTCK_STRICT)
-            configdict["smtp_certificate_checks"] = str(const.DC_CERTCK_STRICT)
 
         assert "addr" in configdict and "mail_pw" in configdict
         return configdict
@@ -505,7 +504,6 @@ class ACFactory:
                 "addr": cloned_from.get_config("addr"),
                 "mail_pw": cloned_from.get_config("mail_pw"),
                 "imap_certificate_checks": cloned_from.get_config("imap_certificate_checks"),
-                "smtp_certificate_checks": cloned_from.get_config("smtp_certificate_checks"),
             }
         configdict.update(kwargs)
         ac = self._get_cached_account(addr=configdict["addr"]) if cache else None

scripts/update-provider-database.sh

@@ -6,7 +6,7 @@ set -euo pipefail
 export TZ=UTC
 
 # Provider database revision.
-REV=996c4bc82be5a7404f70b185ff062da33bfa98d9
+REV=ad097ee40579c884e7757de2d3bb0a51f481a32a
 
 CORE_ROOT="$PWD"
 TMP="$(mktemp -d)"

src/chat.rs

@@ -23,8 +23,9 @@ use crate::chatlist_events;
 use crate::color::str_to_color;
 use crate::config::Config;
 use crate::constants::{
-    Blocked, Chattype, DC_CHAT_ID_ALLDONE_HINT, DC_CHAT_ID_ARCHIVED_LINK, DC_CHAT_ID_LAST_SPECIAL,
-    DC_CHAT_ID_TRASH, DC_RESEND_USER_AVATAR_DAYS, EDITED_PREFIX, TIMESTAMP_SENT_TOLERANCE,
+    self, Blocked, Chattype, DC_CHAT_ID_ALLDONE_HINT, DC_CHAT_ID_ARCHIVED_LINK,
+    DC_CHAT_ID_LAST_SPECIAL, DC_CHAT_ID_TRASH, DC_RESEND_USER_AVATAR_DAYS, EDITED_PREFIX,
+    TIMESTAMP_SENT_TOLERANCE,
 };
 use crate::contact::{self, Contact, ContactId, Origin};
 use crate::context::Context;
@@ -34,7 +35,7 @@ use crate::download::{
 };
 use crate::ephemeral::{Timer as EphemeralTimer, start_chat_ephemeral_timers};
 use crate::events::EventType;
-use crate::key::self_fingerprint;
+use crate::key::{Fingerprint, self_fingerprint};
 use crate::location;
 use crate::log::{LogExt, warn};
 use crate::logged_debug_assert;
@@ -2946,17 +2947,19 @@ pub(crate) async fn create_send_msg_jobs(context: &Context, msg: &mut Message) -
             "
 UPDATE msgs SET
     timestamp=(
-        SELECT MAX(timestamp) FROM msgs WHERE
+        SELECT MAX(timestamp) FROM msgs INDEXED BY msgs_index7 WHERE
             -- From `InFresh` to `OutMdnRcvd` inclusive except `OutDraft`.
             state IN(10,13,16,18,20,24,26,28) AND
             hidden IN(0,1) AND
-            chat_id=?
+            chat_id=? AND
+            id<=?
     ),
     pre_rfc724_mid=?, subject=?, param=?
 WHERE id=?
             ",
             (
                 msg.chat_id,
+                msg.id,
                 &msg.pre_rfc724_mid,
                 &msg.subject,
                 msg.param.to_string(),
@@ -3125,7 +3128,8 @@ pub async fn get_chat_msgs(context: &Context, chat_id: ChatId) -> Result<Vec<Cha
     .await
 }
 
-/// Returns messages belonging to the chat according to the given options.
+/// Returns messages belonging to the chat according to the given options,
+/// sorted by oldest message first.
 #[expect(clippy::arithmetic_side_effects)]
 pub async fn get_chat_msgs_ex(
     context: &Context,
@@ -3136,6 +3140,7 @@ pub async fn get_chat_msgs_ex(
         info_only,
         add_daymarker,
     } = options;
+    // TODO: Remove `info_only` parameter; it's not used by anything
     let process_row = if info_only {
         |row: &rusqlite::Row| {
             // is_info logic taken from Message.is_info()
@@ -4009,9 +4014,47 @@ pub(crate) async fn add_contact_to_chat_ex(
     if sync.into() {
         chat.sync_contacts(context).await.log_err(context).ok();
     }
+    if chat.typ == Chattype::OutBroadcast {
+        resend_last_msgs(context, chat.id, &contact)
+            .await
+            .log_err(context)
+            .ok();
+    }
     Ok(true)
 }
 
+async fn resend_last_msgs(context: &Context, chat_id: ChatId, to_contact: &Contact) -> Result<()> {
+    let msgs: Vec<MsgId> = context
+        .sql
+        .query_map_vec(
+            "
+SELECT id
+FROM msgs
+WHERE chat_id=?
+    AND hidden=0
+    AND NOT ( -- Exclude info and system messages
+        param GLOB '*\nS=*' OR param GLOB 'S=*'
+        OR from_id=?
+        OR to_id=?
+    )
+    AND type!=?
+ORDER BY timestamp DESC, id DESC LIMIT ?",
+            (
+                chat_id,
+                ContactId::INFO,
+                ContactId::INFO,
+                Viewtype::Webxdc,
+                constants::N_MSGS_TO_NEW_BROADCAST_MEMBER,
+            ),
+            |row: &rusqlite::Row| Ok(row.get::<_, MsgId>(0)?),
+        )
+        .await?
+        .into_iter()
+        .rev()
+        .collect();
+    resend_msgs_ex(context, &msgs, to_contact.fingerprint()).await
+}
+
 /// Returns true if an avatar should be attached in the given chat.
 ///
 /// This function does not check if the avatar is set.
@@ -4675,10 +4718,26 @@ pub(crate) async fn save_copy_in_self_talk(
     Ok(msg.rfc724_mid)
 }
 
-/// Resends given messages with the same Message-ID.
+/// Resends given messages to members of the corresponding chats.
 ///
 /// This is primarily intended to make existing webxdcs available to new chat members.
 pub async fn resend_msgs(context: &Context, msg_ids: &[MsgId]) -> Result<()> {
+    resend_msgs_ex(context, msg_ids, None).await
+}
+
+/// Resends given messages to a contact with fingerprint `to_fingerprint` or, if it's `None`, to
+/// members of the corresponding chats.
+///
+/// NB: Actually `to_fingerprint` is only passed for `OutBroadcast` chats when a new member is
+/// added. Regarding webxdcs: It is not trivial to resend only the own status updates,
+/// and it is not trivial to resend them only to the newly-joined member,
+/// so that for now, [`resend_last_msgs`] does not automatically resend webxdcs at all.
+pub(crate) async fn resend_msgs_ex(
+    context: &Context,
+    msg_ids: &[MsgId],
+    to_fingerprint: Option<Fingerprint>,
+) -> Result<()> {
+    let to_fingerprint = to_fingerprint.map(|f| f.hex());
     let mut msgs: Vec<Message> = Vec::new();
     for msg_id in msg_ids {
         let msg = Message::load_from_db(context, *msg_id).await?;
@@ -4697,10 +4756,17 @@ pub async fn resend_msgs(context: &Context, msg_ids: &[MsgId]) -> Result<()> {
             | MessageState::OutFailed
             | MessageState::OutDelivered
             | MessageState::OutMdnRcvd => {
-                message::update_msg_state(context, msg.id, MessageState::OutPending).await?
+                // Broadcast owners shouldn't see spinners on messages being auto-re-sent to new
+                // subscribers (otherwise big channel owners will see spinners most of the time).
+                if to_fingerprint.is_none() {
+                    message::update_msg_state(context, msg.id, MessageState::OutPending).await?;
+                }
             }
             msg_state => bail!("Unexpected message state {msg_state}"),
         }
+        if let Some(to_fingerprint) = &to_fingerprint {
+            msg.param.set(Param::Arg4, to_fingerprint.clone());
+        }
         if create_send_msg_jobs(context, &mut msg).await?.is_empty() {
             continue;
         }
@@ -4712,7 +4778,8 @@ pub async fn resend_msgs(context: &Context, msg_ids: &[MsgId]) -> Result<()> {
             chat_id: msg.chat_id,
             msg_id: msg.id,
         });
-        // note(treefit): only matters if it is the last message in chat (but probably to expensive to check, debounce also solves it)
+        // The event only matters if the message is last in the chat.
+        // But it's probably too expensive check, and UIs anyways need to debounce.
         chatlist_events::emit_chatlist_item_changed(context, msg.chat_id);
 
         if msg.viewtype == Viewtype::Webxdc {

src/chat/chat_tests.rs

@@ -3,7 +3,7 @@ use std::sync::Arc;
 use super::*;
 use crate::Event;
 use crate::chatlist::get_archived_cnt;
-use crate::constants::{DC_GCL_ARCHIVED_ONLY, DC_GCL_NO_SPECIALS};
+use crate::constants::{DC_GCL_ARCHIVED_ONLY, DC_GCL_NO_SPECIALS, N_MSGS_TO_NEW_BROADCAST_MEMBER};
 use crate::ephemeral::Timer;
 use crate::headerdef::HeaderDef;
 use crate::imex::{ImexMode, has_backup, imex};
@@ -746,7 +746,7 @@ async fn test_leave_group() -> Result<()> {
 
     assert_eq!(get_chat_contacts(&alice, alice_chat_id).await?.len(), 1);
 
-    assert_eq!(rcvd_leave_msg.state, MessageState::InNoticed);
+    assert_eq!(rcvd_leave_msg.state, MessageState::InSeen);
 
     alice.emit_event(EventType::Test);
     alice
@@ -2692,6 +2692,49 @@ async fn test_resend_own_message() -> Result<()> {
     Ok(())
 }
 
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn test_resend_doesnt_resort_msg() -> Result<()> {
+    let mut tcm = TestContextManager::new();
+    let alice = &tcm.alice().await;
+    let bob = &tcm.bob().await;
+    let alice_grp = create_group(alice, "").await?;
+    let sent1 = alice.send_text(alice_grp, "hi").await;
+    let sent1_ts = Message::load_from_db(alice, sent1.sender_msg_id)
+        .await?
+        .timestamp_sort;
+
+    SystemTime::shift(Duration::from_secs(60));
+    add_contact_to_chat(alice, alice_grp, alice.add_or_lookup_contact_id(bob).await).await?;
+    let sent2 = alice
+        .send_text(
+            alice_grp,
+            "Let's test resending, there are very few tests on it",
+        )
+        .await;
+    let resent_msg_id = sent1.sender_msg_id;
+    resend_msgs(alice, &[resent_msg_id]).await?;
+    assert_eq!(
+        resent_msg_id.get_state(alice).await?,
+        MessageState::OutPending
+    );
+    alice.pop_sent_msg().await;
+    assert_eq!(
+        resent_msg_id.get_state(alice).await?,
+        MessageState::OutDelivered
+    );
+    assert_eq!(
+        Message::load_from_db(alice, sent1.sender_msg_id)
+            .await?
+            .timestamp_sort,
+        sent1_ts
+    );
+    assert_eq!(
+        alice.get_last_msg_id_in(alice_grp).await,
+        sent2.sender_msg_id
+    );
+    Ok(())
+}
+
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
 async fn test_resend_foreign_message_fails() -> Result<()> {
     let mut tcm = TestContextManager::new();
@@ -2805,6 +2848,15 @@ async fn test_broadcast_members_cant_see_each_other() -> Result<()> {
             "alice@example.org charlie@example.net"
         );
 
+        // Check additionally that subscribers don't send "Chat-Group-Name*" headers.
+        let parsed = alice.parse_msg(&request_with_auth).await;
+        assert!(parsed.get_header(HeaderDef::ChatGroupName).is_none());
+        assert!(
+            parsed
+                .get_header(HeaderDef::ChatGroupNameTimestamp)
+                .is_none()
+        );
+
         alice.recv_msg_trash(&request_with_auth).await;
     }
 
@@ -2947,6 +2999,56 @@ async fn test_broadcast_change_name() -> Result<()> {
     Ok(())
 }
 
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn test_broadcast_resend_to_new_member() -> Result<()> {
+    let mut tcm = TestContextManager::new();
+    let alice = &tcm.alice().await;
+    let bob = &tcm.bob().await;
+    let fiona = &tcm.fiona().await;
+
+    let alice_bc_id = create_broadcast(alice, "Channel".to_string()).await?;
+    let qr = get_securejoin_qr(alice, Some(alice_bc_id)).await.unwrap();
+
+    tcm.exec_securejoin_qr(bob, alice, &qr).await;
+    let mut alice_msg_ids = Vec::new();
+    for i in 0..(N_MSGS_TO_NEW_BROADCAST_MEMBER + 1) {
+        alice_msg_ids.push(
+            alice
+                .send_text(alice_bc_id, &i.to_string())
+                .await
+                .sender_msg_id,
+        );
+    }
+    let fiona_bc_id = tcm.exec_securejoin_qr(fiona, alice, &qr).await;
+    for msg_id in alice_msg_ids {
+        assert_eq!(msg_id.get_state(alice).await?, MessageState::OutDelivered);
+    }
+    for i in 0..N_MSGS_TO_NEW_BROADCAST_MEMBER {
+        let rev_order = false;
+        let resent_msg = alice
+            .pop_sent_msg_ex(rev_order, Duration::ZERO)
+            .await
+            .unwrap();
+        let fiona_msg = fiona.recv_msg(&resent_msg).await;
+        assert_eq!(fiona_msg.chat_id, fiona_bc_id);
+        assert_eq!(fiona_msg.text, (i + 1).to_string());
+        assert!(resent_msg.recipients.contains("fiona@example.net"));
+        assert!(!resent_msg.recipients.contains("bob@"));
+        // The message is undecryptable for Bob, he mustn't be able to know yet that somebody joined
+        // the broadcast even if he is a postman in this land. E.g. Fiona may leave after fetching
+        // the news, Bob won't know about that.
+        assert!(
+            MimeMessage::from_bytes(bob, resent_msg.payload().as_bytes())
+                .await?
+                .decryption_error
+                .is_some()
+        );
+        bob.recv_msg_trash(&resent_msg).await;
+    }
+    assert!(alice.pop_sent_msg_opt(Duration::ZERO).await.is_none());
+    Ok(())
+}
+
 /// - Alice has multiple devices
 /// - Alice creates a broadcast and sends a message into it
 /// - Alice's second device sees the broadcast

src/config.rs

@@ -42,50 +42,85 @@ use crate::{constants, stats};
 )]
 #[strum(serialize_all = "snake_case")]
 pub enum Config {
+    /// Deprecated(2026-04).
+    /// Use ConfiguredAddr, [`crate::login_param::EnteredLoginParam`],
+    /// or add_transport{from_qr}()/list_transports() instead.
+    ///
     /// Email address, used in the `From:` field.
     Addr,
 
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// IMAP server hostname.
     MailServer,
 
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// IMAP server username.
     MailUser,
 
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// IMAP server password.
     MailPw,
 
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// IMAP server port.
     MailPort,
 
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// IMAP server security (e.g. TLS, STARTTLS).
     MailSecurity,
 
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// How to check TLS certificates.
     ///
     /// "IMAP" in the name is for compatibility,
     /// this actually applies to both IMAP and SMTP connections.
     ImapCertificateChecks,
 
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// SMTP server hostname.
     SendServer,
 
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// SMTP server username.
     SendUser,
 
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// SMTP server password.
     SendPw,
 
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// SMTP server port.
     SendPort,
 
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// SMTP server security (e.g. TLS, STARTTLS).
     SendSecurity,
 
-    /// Deprecated option for backwards compatibility.
+    /// Deprecated(2026-04).
+    /// Use EnteredLoginParam and add_transport{from_qr}()/list_transports() instead.
     ///
-    /// Certificate checks for SMTP are actually controlled by `imap_certificate_checks` config.
-    SmtpCertificateChecks,
-
     /// Whether to use OAuth 2.
     ///
     /// Historically contained other bitflags, which are now deprecated.
@@ -185,32 +220,47 @@ pub enum Config {
     /// The primary email address.
     ConfiguredAddr,
 
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// List of configured IMAP servers as a JSON array.
     ConfiguredImapServers,
 
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// Configured IMAP server hostname.
     ///
     /// This is replaced by `configured_imap_servers` for new configurations.
     ConfiguredMailServer,
 
-    /// Configured IMAP server port.
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
     ///
-    /// This is replaced by `configured_imap_servers` for new configurations.
+    /// Configured IMAP server port.
     ConfiguredMailPort,
 
-    /// Configured IMAP server security (e.g. TLS, STARTTLS).
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
     ///
-    /// This is replaced by `configured_imap_servers` for new configurations.
+    /// Configured IMAP server security (e.g. TLS, STARTTLS).
     ConfiguredMailSecurity,
 
-    /// Configured IMAP server username.
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
     ///
-    /// This is set if user has configured username manually.
+    /// Configured IMAP server username.
     ConfiguredMailUser,
 
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// Configured IMAP server password.
     ConfiguredMailPw,
 
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// Configured TLS certificate checks.
     /// This option is saved on successful configuration
     /// and should not be modified manually.
@@ -219,37 +269,53 @@ pub enum Config {
     /// but has "IMAP" in the name for backwards compatibility.
     ConfiguredImapCertificateChecks,
 
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// List of configured SMTP servers as a JSON array.
     ConfiguredSmtpServers,
 
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// Configured SMTP server hostname.
     ///
     /// This is replaced by `configured_smtp_servers` for new configurations.
     ConfiguredSendServer,
 
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// Configured SMTP server port.
     ///
     /// This is replaced by `configured_smtp_servers` for new configurations.
     ConfiguredSendPort,
 
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// Configured SMTP server security (e.g. TLS, STARTTLS).
     ///
     /// This is replaced by `configured_smtp_servers` for new configurations.
     ConfiguredSendSecurity,
 
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// Configured SMTP server username.
     ///
     /// This is set if user has configured username manually.
     ConfiguredSendUser,
 
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
+    ///
     /// Configured SMTP server password.
     ConfiguredSendPw,
 
-    /// Deprecated, stored for backwards compatibility.
+    /// Deprecated(2026-04).
+    /// Use ConfiguredLoginParam and add_transport{from_qr}()/list_transports() instead.
     ///
-    /// ConfiguredImapCertificateChecks is actually used.
-    ConfiguredSmtpCertificateChecks,
-
     /// Whether OAuth 2 is used with configured provider.
     ConfiguredServerFlags,
 
@@ -262,6 +328,9 @@ pub enum Config {
     /// ID of the configured provider from the provider database.
     ConfiguredProvider,
 
+    /// Deprecated(2026-04).
+    /// Use [`Context::is_configured()`] instead.
+    ///
     /// True if account is configured.
     Configured,
 

src/configure.rs

@@ -76,7 +76,7 @@ impl Context {
     /// Deprecated since 2025-02; use `add_transport_from_qr()`
     /// or `add_or_update_transport()` instead.
     pub async fn configure(&self) -> Result<()> {
-        let mut param = EnteredLoginParam::load(self).await?;
+        let mut param = EnteredLoginParam::load_legacy(self).await?;
 
         self.add_transport_inner(&mut param).await
     }
@@ -150,7 +150,7 @@ impl Context {
             progress!(self, 0, Some(error_msg.clone()));
             bail!(error_msg);
         } else {
-            param.save(self).await?;
+            param.save_legacy(self).await?;
             progress!(self, 1000);
         }
 

src/constants.rs

@@ -244,6 +244,9 @@ Here is what to do:
 
 If you have any questions, please send an email to delta@merlinux.eu or ask at https://support.delta.chat/."#;
 
+/// How many recent messages should be re-sent to a new broadcast member.
+pub(crate) const N_MSGS_TO_NEW_BROADCAST_MEMBER: usize = 10;
+
 #[cfg(test)]
 mod tests {
     use num_traits::FromPrimitive;

src/context/context_tests.rs

@@ -284,7 +284,6 @@ async fn test_get_info_completeness() {
         "send_security",
         "server_flags",
         "skip_start_messages",
-        "smtp_certificate_checks",
         "proxy_url",      // May contain passwords, don't leak it to the logs.
         "socks5_enabled", // SOCKS5 options are deprecated.
         "socks5_host",

src/imap.rs

@@ -6,7 +6,7 @@
 use std::{
     cmp::max,
     cmp::min,
-    collections::{BTreeMap, HashMap},
+    collections::{BTreeMap, BTreeSet, HashMap},
     iter::Peekable,
     mem::take,
     sync::atomic::Ordering,
@@ -24,7 +24,8 @@ use url::Url;
 use crate::calls::{
     UnresolvedIceServer, create_fallback_ice_servers, create_ice_servers_from_metadata,
 };
-use crate::chat::{self, ChatIdBlocked, add_device_msg};
+use crate::chat::{self, ChatId, ChatIdBlocked, add_device_msg};
+use crate::chatlist_events;
 use crate::config::Config;
 use crate::constants::{Blocked, DC_VERSION_STR};
 use crate::contact::ContactId;
@@ -33,7 +34,7 @@ use crate::ensure_and_debug_assert;
 use crate::events::EventType;
 use crate::headerdef::{HeaderDef, HeaderDefMap};
 use crate::log::{LogExt, warn};
-use crate::message::{self, Message};
+use crate::message::{self, Message, MessageState, MsgId};
 use crate::mimeparser;
 use crate::net::proxy::ProxyConfig;
 use crate::net::session::SessionStream;
@@ -488,7 +489,7 @@ impl Imap {
         let session = match self.connect(context, configuring).await {
             Ok(session) => session,
             Err(err) => {
-                self.connectivity.set_err(context, &err);
+                self.connectivity.set_err(context, format!("{err:#}"));
                 return Err(err);
             }
         };
@@ -1172,6 +1173,114 @@ impl Session {
         Ok(())
     }
 
+    /// Synchronizes `\Seen` flags using `CONDSTORE` extension.
+    pub(crate) async fn sync_seen_flags(&mut self, context: &Context, folder: &str) -> Result<()> {
+        if !self.can_condstore() {
+            info!(
+                context,
+                "Server does not support CONDSTORE, skipping flag synchronization."
+            );
+            return Ok(());
+        }
+
+        if context.get_config_bool(Config::TeamProfile).await? {
+            return Ok(());
+        }
+
+        let folder_exists = self
+            .select_with_uidvalidity(context, folder)
+            .await
+            .context("Failed to select folder")?;
+        if !folder_exists {
+            return Ok(());
+        }
+
+        let mailbox = self
+            .selected_mailbox
+            .as_ref()
+            .with_context(|| format!("No mailbox selected, folder: {folder}"))?;
+
+        // Check if the mailbox supports MODSEQ.
+        // We are not interested in actual value of HIGHESTMODSEQ.
+        if mailbox.highest_modseq.is_none() {
+            info!(
+                context,
+                "Mailbox {} does not support mod-sequences, skipping flag synchronization.", folder
+            );
+            return Ok(());
+        }
+
+        let transport_id = self.transport_id();
+        let mut updated_chat_ids = BTreeSet::new();
+        let uid_validity = get_uidvalidity(context, transport_id, folder)
+            .await
+            .with_context(|| format!("failed to get UID validity for folder {folder}"))?;
+        let mut highest_modseq = get_modseq(context, transport_id, folder)
+            .await
+            .with_context(|| format!("failed to get MODSEQ for folder {folder}"))?;
+        let mut list = self
+            .uid_fetch("1:*", format!("(FLAGS) (CHANGEDSINCE {highest_modseq})"))
+            .await
+            .context("failed to fetch flags")?;
+
+        let mut got_unsolicited_fetch = false;
+
+        while let Some(fetch) = list
+            .try_next()
+            .await
+            .context("failed to get FETCH result")?
+        {
+            let uid = if let Some(uid) = fetch.uid {
+                uid
+            } else {
+                info!(context, "FETCH result contains no UID, skipping");
+                got_unsolicited_fetch = true;
+                continue;
+            };
+            let is_seen = fetch.flags().any(|flag| flag == Flag::Seen);
+            if is_seen
+                && let Some(chat_id) = mark_seen_by_uid(context, transport_id, folder, uid_validity, uid)
+                    .await
+                    .with_context(|| {
+                        format!("Transport {transport_id}: Failed to update seen status for msg {folder}/{uid}")
+                    })?
+            {
+                updated_chat_ids.insert(chat_id);
+            }
+
+            if let Some(modseq) = fetch.modseq {
+                if modseq > highest_modseq {
+                    highest_modseq = modseq;
+                }
+            } else {
+                warn!(context, "FETCH result contains no MODSEQ");
+            }
+        }
+        drop(list);
+
+        if got_unsolicited_fetch {
+            // We got unsolicited FETCH, which means some flags
+            // have been modified while our request was in progress.
+            // We may or may not have these new flags as a part of the response,
+            // so better skip next IDLE and do another round of flag synchronization.
+            info!(context, "Got unsolicited fetch, will skip idle");
+            self.new_mail = true;
+        }
+
+        set_modseq(context, transport_id, folder, highest_modseq)
+            .await
+            .with_context(|| format!("failed to set MODSEQ for folder {folder}"))?;
+        if !updated_chat_ids.is_empty() {
+            context.on_archived_chats_maybe_noticed();
+        }
+        for updated_chat_id in updated_chat_ids {
+            context.emit_event(EventType::MsgsNoticed(updated_chat_id));
+            chatlist_events::emit_chatlist_item_changed(context, updated_chat_id);
+        }
+
+        Ok(())
+    }
+
     /// Fetches a list of messages by server UID.
     ///
     /// Sends pairs of UID and info about each downloaded message to the provided channel.
@@ -1919,6 +2028,71 @@ pub(crate) async fn prefetch_should_download(
     Ok(should_download)
 }
 
+/// Marks messages in `msgs` table as seen, searching for them by UID.
+///
+/// Returns updated chat ID if any message was marked as seen.
+async fn mark_seen_by_uid(
+    context: &Context,
+    transport_id: u32,
+    folder: &str,
+    uid_validity: u32,
+    uid: u32,
+) -> Result<Option<ChatId>> {
+    if let Some((msg_id, chat_id)) = context
+        .sql
+        .query_row_optional(
+            "SELECT id, chat_id FROM msgs
+                 WHERE id > 9 AND rfc724_mid IN (
+                   SELECT rfc724_mid FROM imap
+                   WHERE transport_id=?
+                   AND folder=?
+                   AND uidvalidity=?
+                   AND uid=?
+                   LIMIT 1
+                 )",
+            (transport_id, &folder, uid_validity, uid),
+            |row| {
+                let msg_id: MsgId = row.get(0)?;
+                let chat_id: ChatId = row.get(1)?;
+                Ok((msg_id, chat_id))
+            },
+        )
+        .await
+        .with_context(|| format!("failed to get msg and chat ID for IMAP message {folder}/{uid}"))?
+    {
+        let updated = context
+            .sql
+            .execute(
+                "UPDATE msgs SET state=?1
+                     WHERE (state=?2 OR state=?3)
+                     AND id=?4",
+                (
+                    MessageState::InSeen,
+                    MessageState::InFresh,
+                    MessageState::InNoticed,
+                    msg_id,
+                ),
+            )
+            .await
+            .with_context(|| format!("failed to update msg {msg_id} state"))?
+            > 0;
+
+        if updated {
+            msg_id
+                .start_ephemeral_timer(context)
+                .await
+                .with_context(|| format!("failed to start ephemeral timer for message {msg_id}"))?;
+            Ok(Some(chat_id))
+        } else {
+            // Message state has not changed.
+            Ok(None)
+        }
+    } else {
+        // There is no message is `msgs` table matching the given UID.
+        Ok(None)
+    }
+}
+
 /// Schedule marking the message as Seen on IMAP by adding all known IMAP messages corresponding to
 /// the given Message-ID to `imap_markseen` table.
 pub(crate) async fn markseen_on_imap_table(context: &Context, message_id: &str) -> Result<()> {
@@ -2016,6 +2190,17 @@ pub(crate) async fn set_modseq(
     Ok(())
 }
 
+async fn get_modseq(context: &Context, transport_id: u32, folder: &str) -> Result<u64> {
+    Ok(context
+        .sql
+        .query_get_value(
+            "SELECT modseq FROM imap_sync WHERE transport_id=? AND folder=?",
+            (transport_id, folder),
+        )
+        .await?
+        .unwrap_or(0))
+}
+
 /// Builds a list of sequence/uid sets. The returned sets have each no more than around 1000
 /// characters because according to <https://tools.ietf.org/html/rfc2683#section-3.2.1.5>
 /// command lines should not be much more than 1000 chars (servers should allow at least 8000 chars)

src/imap/capabilities.rs

@@ -17,6 +17,10 @@ pub(crate) struct Capabilities {
     /// <https://tools.ietf.org/html/rfc2087>
     pub can_check_quota: bool,
 
+    /// True if the server has CONDSTORE capability as defined in
+    /// <https://tools.ietf.org/html/rfc7162>
+    pub can_condstore: bool,
+
     /// True if the server has METADATA capability as defined in
     /// <https://tools.ietf.org/html/rfc5464>
     pub can_metadata: bool,

src/imap/client.rs

@@ -66,6 +66,7 @@ pub(crate) async fn determine_capabilities(
         can_idle: caps.has_str("IDLE"),
         can_move: caps.has_str("MOVE"),
         can_check_quota: caps.has_str("QUOTA"),
+        can_condstore: caps.has_str("CONDSTORE"),
         can_metadata: caps.has_str("METADATA"),
         can_compress: caps.has_str("COMPRESS=DEFLATE"),
         can_push: caps.has_str("XDELTAPUSH"),

src/imap/imap_tests.rs

@@ -1,5 +1,4 @@
 use super::*;
-use crate::chat::ChatId;
 use crate::contact::Contact;
 use crate::test_utils::TestContext;
 

src/imap/select_folder.rs

@@ -65,7 +65,11 @@ impl ImapSession {
         self.maybe_close_folder(context).await?;
 
         // select new folder
-        let res = self.select(folder).await;
+        let res = if self.can_condstore() {
+            self.select_condstore(folder).await
+        } else {
+            self.select(folder).await
+        };
 
         let transport_id = self.transport_id();
 

src/imap/session.rs

@@ -100,6 +100,10 @@ impl Session {
         self.capabilities.can_check_quota
     }
 
+    pub fn can_condstore(&self) -> bool {
+        self.capabilities.can_condstore
+    }
+
     pub fn can_metadata(&self) -> bool {
         self.capabilities.can_metadata
     }

src/login_param.rs

@@ -138,10 +138,11 @@ pub struct EnteredLoginParam {
 }
 
 impl EnteredLoginParam {
-    /// Loads entered account settings.
+    /// Loads entered account settings
+    /// that were set by the deprecated `configured_*` configs.
     ///
-    /// This is a legacy API for loading from separate config parameters.
-    pub(crate) async fn load(context: &Context) -> Result<Self> {
+    /// This is only needed by tests and clients using the old CFFI API.
+    pub(crate) async fn load_legacy(context: &Context) -> Result<Self> {
         let addr = context
             .get_config(Config::Addr)
             .await?
@@ -178,7 +179,7 @@ impl EnteredLoginParam {
         // The setting is named `imap_certificate_checks`
         // for backwards compatibility,
         // but now it is a global setting applied to all protocols,
-        // while `smtp_certificate_checks` is ignored.
+        // while `smtp_certificate_checks` has been removed.
         let certificate_checks = if let Some(certificate_checks) = context
             .get_config_parsed::<i32>(Config::ImapCertificateChecks)
             .await?
@@ -241,7 +242,10 @@ impl EnteredLoginParam {
 
     /// Saves entered account settings,
     /// so that they can be prefilled if the user wants to configure the server again.
-    pub(crate) async fn save(&self, context: &Context) -> Result<()> {
+    ///
+    /// This is needed in case a UI is not yet updated, and still uses `get_config("mail_pw")` etc.
+    /// in order to prefill the entered account settings.
+    pub(crate) async fn save_legacy(&self, context: &Context) -> Result<()> {
         context.set_config(Config::Addr, Some(&self.addr)).await?;
 
         context
@@ -364,7 +368,7 @@ mod tests {
             .await?;
         t.set_config(Config::MailPw, Some("foobarbaz")).await?;
 
-        let param = EnteredLoginParam::load(t).await?;
+        let param = EnteredLoginParam::load_legacy(t).await?;
         assert_eq!(param.addr, "alice@example.org");
         assert_eq!(
             param.certificate_checks,
@@ -373,13 +377,13 @@ mod tests {
 
         t.set_config(Config::ImapCertificateChecks, Some("1"))
             .await?;
-        let param = EnteredLoginParam::load(t).await?;
+        let param = EnteredLoginParam::load_legacy(t).await?;
         assert_eq!(param.certificate_checks, EnteredCertificateChecks::Strict);
 
         // Fail to load invalid settings, but do not panic.
         t.set_config(Config::ImapCertificateChecks, Some("999"))
             .await?;
-        assert!(EnteredLoginParam::load(t).await.is_err());
+        assert!(EnteredLoginParam::load_legacy(t).await.is_err());
 
         Ok(())
     }
@@ -407,7 +411,7 @@ mod tests {
             certificate_checks: Default::default(),
             oauth2: false,
         };
-        param.save(&t).await?;
+        param.save_legacy(&t).await?;
         assert_eq!(
             t.get_config(Config::Addr).await?.unwrap(),
             "alice@example.org"
@@ -416,7 +420,7 @@ mod tests {
         assert_eq!(t.get_config(Config::SendPw).await?, None);
         assert_eq!(t.get_config_int(Config::SendPort).await?, 2947);
 
-        assert_eq!(EnteredLoginParam::load(&t).await?, param);
+        assert_eq!(EnteredLoginParam::load_legacy(&t).await?, param);
 
         Ok(())
     }

src/mimefactory.rs

@@ -194,6 +194,7 @@ fn new_address_with_name(name: &str, address: String) -> Address<'static> {
 }
 
 impl MimeFactory {
+    /// Returns `MimeFactory` for rendering `msg`.
     #[expect(clippy::arithmetic_side_effects)]
     pub async fn from_msg(context: &Context, msg: Message) -> Result<MimeFactory> {
         let now = time();
@@ -1394,10 +1395,7 @@ impl MimeFactory {
             }
         }
 
-        if chat.typ == Chattype::Group
-            || chat.typ == Chattype::OutBroadcast
-            || chat.typ == Chattype::InBroadcast
-        {
+        if chat.typ == Chattype::Group || chat.typ == Chattype::OutBroadcast {
             headers.push((
                 "Chat-Group-Name",
                 mail_builder::headers::text::Text::new(chat.name.to_string()).into(),
@@ -1408,7 +1406,11 @@ impl MimeFactory {
                     mail_builder::headers::text::Text::new(ts.to_string()).into(),
                 ));
             }
-
+        }
+        if chat.typ == Chattype::Group
+            || chat.typ == Chattype::OutBroadcast
+            || chat.typ == Chattype::InBroadcast
+        {
             match command {
                 SystemMessage::MemberRemovedFromGroup => {
                     let email_to_remove = msg.param.get(Param::Arg).unwrap_or_default();
@@ -2225,18 +2227,18 @@ fn should_encrypt_symmetrically(msg: &Message, chat: &Chat) -> bool {
 /// rather than all recipients.
 /// This function returns the fingerprint of the recipient the message should be sent to.
 fn must_have_only_one_recipient<'a>(msg: &'a Message, chat: &Chat) -> Option<Result<&'a str>> {
-    if chat.typ == Chattype::OutBroadcast
-        && matches!(
-            msg.param.get_cmd(),
-            SystemMessage::MemberRemovedFromGroup | SystemMessage::MemberAddedToGroup
-        )
-    {
-        let Some(fp) = msg.param.get(Param::Arg4) else {
-            return Some(Err(format_err!("Missing removed/added member")));
-        };
-        return Some(Ok(fp));
+    if chat.typ != Chattype::OutBroadcast {
+        None
+    } else if let Some(fp) = msg.param.get(Param::Arg4) {
+        Some(Ok(fp))
+    } else if matches!(
+        msg.param.get_cmd(),
+        SystemMessage::MemberRemovedFromGroup | SystemMessage::MemberAddedToGroup
+    ) {
+        Some(Err(format_err!("Missing removed/added member")))
+    } else {
+        None
     }
-    None
 }
 
 async fn build_body_file(context: &Context, msg: &Message) -> Result<MimePart<'static>> {

src/param.rs

@@ -136,6 +136,10 @@ pub enum Param {
     /// For "MemberAddedToGroup" and "MemberRemovedFromGroup",
     /// this is the fingerprint added to / removed from the group.
     ///
+    /// For messages resent when adding a new member to a broadcast channel,
+    /// this is the fingerprint of the added member;
+    /// the message must only be sent to this one member then.
+    ///
     /// For call messages, this is the end timsetamp.
     Arg4 = b'H',
 

src/provider/data.rs

@@ -234,34 +234,6 @@ static P_BLUEWIN_CH: Provider = Provider {
     oauth2_authorizer: None,
 };
 
-// buzon.uy.md: buzon.uy
-static P_BUZON_UY: Provider = Provider {
-    id: "buzon.uy",
-    status: Status::Ok,
-    before_login_hint: "",
-    after_login_hint: "",
-    overview_page: "https://providers.delta.chat/buzon-uy",
-    server: &[
-        Server {
-            protocol: Imap,
-            socket: Starttls,
-            hostname: "mail.buzon.uy",
-            port: 143,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Smtp,
-            socket: Starttls,
-            hostname: "mail.buzon.uy",
-            port: 587,
-            username_pattern: Email,
-        },
-    ],
-    opt: ProviderOptions::new(),
-    config_defaults: None,
-    oauth2_authorizer: None,
-};
-
 // chello.at.md: chello.at
 static P_CHELLO_AT: Provider = Provider {
     id: "chello.at",
@@ -303,48 +275,6 @@ static P_COMCAST: Provider = Provider {
     oauth2_authorizer: None,
 };
 
-// daleth.cafe.md: daleth.cafe
-static P_DALETH_CAFE: Provider = Provider {
-    id: "daleth.cafe",
-    status: Status::Ok,
-    before_login_hint: "",
-    after_login_hint: "",
-    overview_page: "https://providers.delta.chat/daleth-cafe",
-    server: &[
-        Server {
-            protocol: Imap,
-            socket: Ssl,
-            hostname: "daleth.cafe",
-            port: 993,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Smtp,
-            socket: Ssl,
-            hostname: "daleth.cafe",
-            port: 465,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Imap,
-            socket: Starttls,
-            hostname: "daleth.cafe",
-            port: 143,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Smtp,
-            socket: Starttls,
-            hostname: "daleth.cafe",
-            port: 587,
-            username_pattern: Email,
-        },
-    ],
-    opt: ProviderOptions::new(),
-    config_defaults: None,
-    oauth2_authorizer: None,
-};
-
 // dismail.de.md: dismail.de
 static P_DISMAIL_DE: Provider = Provider {
     id: "dismail.de",
@@ -496,22 +426,6 @@ static P_FIREMAIL_DE: Provider = Provider {
     oauth2_authorizer: None,
 };
 
-// five.chat.md: five.chat
-static P_FIVE_CHAT: Provider = Provider {
-    id: "five.chat",
-    status: Status::Ok,
-    before_login_hint: "",
-    after_login_hint: "",
-    overview_page: "https://providers.delta.chat/five-chat",
-    server: &[],
-    opt: ProviderOptions::new(),
-    config_defaults: Some(&[ConfigDefault {
-        key: Config::BccSelf,
-        value: "1",
-    }]),
-    oauth2_authorizer: None,
-};
-
 // freenet.de.md: freenet.de
 static P_FREENET_DE: Provider = Provider {
     id: "freenet.de",
@@ -629,16 +543,10 @@ static P_HERMES_RADIO: Provider = Provider {
         strict_tls: false,
         ..ProviderOptions::new()
     },
-    config_defaults: Some(&[
-        ConfigDefault {
-            key: Config::MdnsEnabled,
-            value: "0",
-        },
-        ConfigDefault {
-            key: Config::ShowEmails,
-            value: "2",
-        },
-    ]),
+    config_defaults: Some(&[ConfigDefault {
+        key: Config::MdnsEnabled,
+        value: "0",
+    }]),
     oauth2_authorizer: None,
 };
 
@@ -919,90 +827,6 @@ static P_MAILO_COM: Provider = Provider {
     oauth2_authorizer: None,
 };
 
-// mehl.cloud.md: mehl.cloud
-static P_MEHL_CLOUD: Provider = Provider {
-    id: "mehl.cloud",
-    status: Status::Ok,
-    before_login_hint: "",
-    after_login_hint: "",
-    overview_page: "https://providers.delta.chat/mehl-cloud",
-    server: &[
-        Server {
-            protocol: Imap,
-            socket: Ssl,
-            hostname: "mehl.cloud",
-            port: 443,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Smtp,
-            socket: Ssl,
-            hostname: "mehl.cloud",
-            port: 443,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Imap,
-            socket: Ssl,
-            hostname: "mehl.cloud",
-            port: 993,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Smtp,
-            socket: Ssl,
-            hostname: "mehl.cloud",
-            port: 465,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Imap,
-            socket: Starttls,
-            hostname: "mehl.cloud",
-            port: 143,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Smtp,
-            socket: Starttls,
-            hostname: "mehl.cloud",
-            port: 587,
-            username_pattern: Email,
-        },
-    ],
-    opt: ProviderOptions::new(),
-    config_defaults: None,
-    oauth2_authorizer: None,
-};
-
-// mehl.store.md: mehl.store, ende.in.net, l2i.top, szh.homes, sls.post.in, ente.quest, ente.cfd, nein.jetzt
-static P_MEHL_STORE: Provider = Provider {
-    id: "mehl.store",
-    status: Status::Ok,
-    before_login_hint: "",
-    after_login_hint: "This account provides 3GB storage for eMails and the possibility to access a NEXTCLOUD-instance by using the email-credits!",
-    overview_page: "https://providers.delta.chat/mehl-store",
-    server: &[
-        Server {
-            protocol: Imap,
-            socket: Ssl,
-            hostname: "mail.ende.in.net",
-            port: 993,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Smtp,
-            socket: Starttls,
-            hostname: "mail.ende.in.net",
-            port: 587,
-            username_pattern: Email,
-        },
-    ],
-    opt: ProviderOptions::new(),
-    config_defaults: None,
-    oauth2_authorizer: None,
-};
-
 // migadu.md: migadu.com
 static P_MIGADU: Provider = Provider {
     id: "migadu",
@@ -1250,8 +1074,8 @@ static P_OUVATON_COOP: Provider = Provider {
 // posteo.md: posteo.de, posteo.af, posteo.at, posteo.be, posteo.ca, posteo.ch, posteo.cl, posteo.co, posteo.co.uk, posteo.com, posteo.com.br, posteo.cr, posteo.cz, posteo.dk, posteo.ee, posteo.es, posteo.eu, posteo.fi, posteo.gl, posteo.gr, posteo.hn, posteo.hr, posteo.hu, posteo.ie, posteo.in, posteo.is, posteo.it, posteo.jp, posteo.la, posteo.li, posteo.lt, posteo.lu, posteo.me, posteo.mx, posteo.my, posteo.net, posteo.nl, posteo.no, posteo.nz, posteo.org, posteo.pe, posteo.pl, posteo.pm, posteo.pt, posteo.ro, posteo.ru, posteo.se, posteo.sg, posteo.si, posteo.tn, posteo.uk, posteo.us
 static P_POSTEO: Provider = Provider {
     id: "posteo",
-    status: Status::Ok,
-    before_login_hint: "",
+    status: Status::Preparation,
+    before_login_hint: "You must create an app-specific password before you can log in.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/posteo",
     server: &[
@@ -1562,51 +1386,6 @@ static P_T_ONLINE: Provider = Provider {
     oauth2_authorizer: None,
 };
 
-// testrun.md: testrun.org
-static P_TESTRUN: Provider = Provider {
-    id: "testrun",
-    status: Status::Ok,
-    before_login_hint: "",
-    after_login_hint: "",
-    overview_page: "https://providers.delta.chat/testrun",
-    server: &[
-        Server {
-            protocol: Imap,
-            socket: Ssl,
-            hostname: "testrun.org",
-            port: 993,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Smtp,
-            socket: Ssl,
-            hostname: "testrun.org",
-            port: 465,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Imap,
-            socket: Starttls,
-            hostname: "testrun.org",
-            port: 143,
-            username_pattern: Email,
-        },
-        Server {
-            protocol: Smtp,
-            socket: Starttls,
-            hostname: "testrun.org",
-            port: 587,
-            username_pattern: Email,
-        },
-    ],
-    opt: ProviderOptions::new(),
-    config_defaults: Some(&[ConfigDefault {
-        key: Config::BccSelf,
-        value: "1",
-    }]),
-    oauth2_authorizer: None,
-};
-
 // tiscali.it.md: tiscali.it
 static P_TISCALI_IT: Provider = Provider {
     id: "tiscali.it",
@@ -2004,7 +1783,7 @@ static P_ZOHO: Provider = Provider {
     oauth2_authorizer: None,
 };
 
-pub(crate) static PROVIDER_DATA: [(&str, &Provider); 534] = [
+pub(crate) static PROVIDER_DATA: [(&str, &Provider); 521] = [
     ("163.com", &P_163),
     ("aktivix.org", &P_AKTIVIX_ORG),
     ("aliyun.com", &P_ALIYUN),
@@ -2014,11 +1793,9 @@ pub(crate) static PROVIDER_DATA: [(&str, &Provider); 534] = [
     ("delta.blinzeln.de", &P_BLINDZELN_ORG),
     ("delta.blindzeln.org", &P_BLINDZELN_ORG),
     ("bluewin.ch", &P_BLUEWIN_CH),
-    ("buzon.uy", &P_BUZON_UY),
     ("chello.at", &P_CHELLO_AT),
     ("xfinity.com", &P_COMCAST),
     ("comcast.net", &P_COMCAST),
-    ("daleth.cafe", &P_DALETH_CAFE),
     ("dismail.de", &P_DISMAIL_DE),
     ("disroot.org", &P_DISROOT),
     ("e.email", &P_E_EMAIL),
@@ -2145,7 +1922,6 @@ pub(crate) static PROVIDER_DATA: [(&str, &Provider); 534] = [
     ("your-mail.com", &P_FASTMAIL),
     ("firemail.at", &P_FIREMAIL_DE),
     ("firemail.de", &P_FIREMAIL_DE),
-    ("five.chat", &P_FIVE_CHAT),
     ("freenet.de", &P_FREENET_DE),
     ("gmail.com", &P_GMAIL),
     ("googlemail.com", &P_GMAIL),
@@ -2368,15 +2144,6 @@ pub(crate) static PROVIDER_DATA: [(&str, &Provider); 534] = [
     ("mailbox.org", &P_MAILBOX_ORG),
     ("secure.mailbox.org", &P_MAILBOX_ORG),
     ("mailo.com", &P_MAILO_COM),
-    ("mehl.cloud", &P_MEHL_CLOUD),
-    ("mehl.store", &P_MEHL_STORE),
-    ("ende.in.net", &P_MEHL_STORE),
-    ("l2i.top", &P_MEHL_STORE),
-    ("szh.homes", &P_MEHL_STORE),
-    ("sls.post.in", &P_MEHL_STORE),
-    ("ente.quest", &P_MEHL_STORE),
-    ("ente.cfd", &P_MEHL_STORE),
-    ("nein.jetzt", &P_MEHL_STORE),
     ("migadu.com", &P_MIGADU),
     ("nauta.cu", &P_NAUTA_CU),
     ("naver.com", &P_NAVER),
@@ -2469,7 +2236,6 @@ pub(crate) static PROVIDER_DATA: [(&str, &Provider); 534] = [
     ("systemli.org", &P_SYSTEMLI_ORG),
     ("t-online.de", &P_T_ONLINE),
     ("magenta.de", &P_T_ONLINE),
-    ("testrun.org", &P_TESTRUN),
     ("tiscali.it", &P_TISCALI_IT),
     ("tutanota.com", &P_TUTANOTA),
     ("tutanota.de", &P_TUTANOTA),
@@ -2552,10 +2318,8 @@ pub(crate) static PROVIDER_IDS: LazyLock<HashMap<&'static str, &'static Provider
             ("autistici.org", &P_AUTISTICI_ORG),
             ("blindzeln.org", &P_BLINDZELN_ORG),
             ("bluewin.ch", &P_BLUEWIN_CH),
-            ("buzon.uy", &P_BUZON_UY),
             ("chello.at", &P_CHELLO_AT),
             ("comcast", &P_COMCAST),
-            ("daleth.cafe", &P_DALETH_CAFE),
             ("dismail.de", &P_DISMAIL_DE),
             ("disroot", &P_DISROOT),
             ("e.email", &P_E_EMAIL),
@@ -2563,7 +2327,6 @@ pub(crate) static PROVIDER_IDS: LazyLock<HashMap<&'static str, &'static Provider
             ("example.com", &P_EXAMPLE_COM),
             ("fastmail", &P_FASTMAIL),
             ("firemail.de", &P_FIREMAIL_DE),
-            ("five.chat", &P_FIVE_CHAT),
             ("freenet.de", &P_FREENET_DE),
             ("gmail", &P_GMAIL),
             ("gmx.net", &P_GMX_NET),
@@ -2581,8 +2344,6 @@ pub(crate) static PROVIDER_IDS: LazyLock<HashMap<&'static str, &'static Provider
             ("mail2tor", &P_MAIL2TOR),
             ("mailbox.org", &P_MAILBOX_ORG),
             ("mailo.com", &P_MAILO_COM),
-            ("mehl.cloud", &P_MEHL_CLOUD),
-            ("mehl.store", &P_MEHL_STORE),
             ("migadu", &P_MIGADU),
             ("nauta.cu", &P_NAUTA_CU),
             ("naver", &P_NAVER),
@@ -2602,7 +2363,6 @@ pub(crate) static PROVIDER_IDS: LazyLock<HashMap<&'static str, &'static Provider
             ("systemausfall.org", &P_SYSTEMAUSFALL_ORG),
             ("systemli.org", &P_SYSTEMLI_ORG),
             ("t-online", &P_T_ONLINE),
-            ("testrun", &P_TESTRUN),
             ("tiscali.it", &P_TISCALI_IT),
             ("tutanota", &P_TUTANOTA),
             ("ukr.net", &P_UKR_NET),
@@ -2622,4 +2382,4 @@ pub(crate) static PROVIDER_IDS: LazyLock<HashMap<&'static str, &'static Provider
     });
 
 pub static _PROVIDER_UPDATED: LazyLock<chrono::NaiveDate> =
-    LazyLock::new(|| chrono::NaiveDate::from_ymd_opt(2026, 1, 28).unwrap());
+    LazyLock::new(|| chrono::NaiveDate::from_ymd_opt(2026, 4, 21).unwrap());

src/qr/qr_tests.rs

@@ -709,7 +709,7 @@ async fn test_decode_dclogin_advanced_options() -> Result<()> {
     assert_eq!(param.smtp.security, Socket::Plain);
 
     // `sc` option is actually ignored and `ic` is used instead
-    // because `smtp_certificate_checks` is deprecated.
+    // because `smtp_certificate_checks` has been removed.
     assert_eq!(param.certificate_checks, EnteredCertificateChecks::Strict);
 
     Ok(())

src/receive_imf.rs

@@ -1913,11 +1913,14 @@ async fn add_parts(
 
     let state = if !mime_parser.incoming {
         MessageState::OutDelivered
-    } else if seen || !mime_parser.mdn_reports.is_empty() || chat_id_blocked == Blocked::Yes
+    } else if seen
+        || !mime_parser.mdn_reports.is_empty()
+        || chat_id_blocked == Blocked::Yes
+        || group_changes.silent
     // No check for `hidden` because only reactions are such and they should be `InFresh`.
     {
         MessageState::InSeen
-    } else if mime_parser.from.addr == STATISTICS_BOT_EMAIL || group_changes.silent {
+    } else if mime_parser.from.addr == STATISTICS_BOT_EMAIL {
         MessageState::InNoticed
     } else {
         MessageState::InFresh

src/scheduler.rs

@@ -533,6 +533,14 @@ async fn fetch_idle(ctx: &Context, connection: &mut Imap, mut session: Session)
         .await
         .context("download_msgs")?;
 
+    // Synchronize Seen flags.
+    session
+        .sync_seen_flags(ctx, &watch_folder)
+        .await
+        .context("sync_seen_flags")
+        .log_err(ctx)
+        .ok();
+
     connection.connectivity.set_idle(ctx);
 
     ctx.emit_event(EventType::ImapInboxIdle);
@@ -623,7 +631,7 @@ async fn smtp_loop(
             info!(ctx, "SMTP fake idle started.");
             match &connection.last_send_error {
                 None => connection.connectivity.set_idle(&ctx),
-                Some(err) => connection.connectivity.set_err(&ctx, err),
+                Some(err) => connection.connectivity.set_err(&ctx, err.clone()),
             }
 
             // If send_smtp_messages() failed, we set a timeout for the fake-idle so that

src/scheduler/connectivity.rs

@@ -157,8 +157,8 @@ impl ConnectivityStore {
         context.emit_event(EventType::ConnectivityChanged);
     }
 
-    pub(crate) fn set_err(&self, context: &Context, e: impl ToString) {
-        self.set(context, DetailedConnectivity::Error(e.to_string()));
+    pub(crate) fn set_err(&self, context: &Context, e: String) {
+        self.set(context, DetailedConnectivity::Error(e));
     }
     pub(crate) fn set_connecting(&self, context: &Context) {
         self.set(context, DetailedConnectivity::Connecting);

src/sql/migrations.rs

@@ -1919,7 +1919,7 @@ CREATE INDEX gossip_timestamp_index ON gossip_timestamp (chat_id, fingerprint);
 
     inc_and_check(&mut migration_version, 131)?;
     if dbversion < migration_version {
-        let entered_param = EnteredLoginParam::load(context).await?;
+        let entered_param = EnteredLoginParam::load_legacy(context).await?;
         let configured_param = ConfiguredLoginParam::load_legacy(context).await?;
 
         sql.execute_migration_transaction(

src/test_utils.rs

@@ -275,16 +275,17 @@ impl TestContextManager {
 
         let chat_id = join_securejoin(&joiner.ctx, qr).await.unwrap();
 
-        loop {
+        for _ in 0..2 {
             let mut something_sent = false;
-            if let Some(sent) = joiner.pop_sent_msg_opt(Duration::ZERO).await {
+            let rev_order = false;
+            if let Some(sent) = joiner.pop_sent_msg_ex(rev_order, Duration::ZERO).await {
                 for inviter in inviters {
                     inviter.recv_msg_opt(&sent).await;
                 }
                 something_sent = true;
             }
             for inviter in inviters {
-                if let Some(sent) = inviter.pop_sent_msg_opt(Duration::ZERO).await {
+                if let Some(sent) = inviter.pop_sent_msg_ex(rev_order, Duration::ZERO).await {
                     joiner.recv_msg_opt(&sent).await;
                     something_sent = true;
                 }
@@ -623,25 +624,35 @@ impl TestContext {
     }
 
     pub async fn pop_sent_msg_opt(&self, timeout: Duration) -> Option<SentMessage<'_>> {
+        let rev_order = true;
+        self.pop_sent_msg_ex(rev_order, timeout).await
+    }
+
+    pub async fn pop_sent_msg_ex(
+        &self,
+        rev_order: bool,
+        timeout: Duration,
+    ) -> Option<SentMessage<'_>> {
         let start = Instant::now();
+        let mut query = "
+SELECT id, msg_id, mime, recipients
+FROM smtp
+ORDER BY id"
+            .to_string();
+        if rev_order {
+            query += " DESC";
+        }
         let (rowid, msg_id, payload, recipients) = loop {
             let row = self
                 .ctx
                 .sql
-                .query_row_optional(
-                    r#"
-                    SELECT id, msg_id, mime, recipients
-                    FROM smtp
-                    ORDER BY id DESC"#,
-                    (),
-                    |row| {
-                        let rowid: i64 = row.get(0)?;
-                        let msg_id: MsgId = row.get(1)?;
-                        let mime: String = row.get(2)?;
-                        let recipients: String = row.get(3)?;
-                        Ok((rowid, msg_id, mime, recipients))
-                    },
-                )
+                .query_row_optional(&query, (), |row| {
+                    let rowid: i64 = row.get(0)?;
+                    let msg_id: MsgId = row.get(1)?;
+                    let mime: String = row.get(2)?;
+                    let recipients: String = row.get(3)?;
+                    Ok((rowid, msg_id, mime, recipients))
+                })
                 .await
                 .expect("query_row_optional failed");
             if let Some(row) = row {
@@ -823,17 +834,24 @@ impl TestContext {
         assert_eq!(received.chat_id, DC_CHAT_ID_TRASH);
     }
 
+    /// Gets the most recent message ID of a chat.
+    ///
+    /// Panics on errors or if the most recent message is a marker.
+    pub async fn get_last_msg_id_in(&self, chat_id: ChatId) -> MsgId {
+        let msgs = chat::get_chat_msgs(&self.ctx, chat_id).await.unwrap();
+        if let ChatItem::Message { msg_id } = msgs.last().unwrap() {
+            *msg_id
+        } else {
+            panic!("Wrong item type");
+        }
+    }
+
     /// Gets the most recent message of a chat.
     ///
     /// Panics on errors or if the most recent message is a marker.
     pub async fn get_last_msg_in(&self, chat_id: ChatId) -> Message {
-        let msgs = chat::get_chat_msgs(&self.ctx, chat_id).await.unwrap();
-        let msg_id = if let ChatItem::Message { msg_id } = msgs.last().unwrap() {
-            msg_id
-        } else {
-            panic!("Wrong item type");
-        };
-        Message::load_from_db(&self.ctx, *msg_id).await.unwrap()
+        let msg_id = self.get_last_msg_id_in(chat_id).await;
+        Message::load_from_db(&self.ctx, msg_id).await.unwrap()
     }
 
     /// Gets the most recent message over all chats.

src/transport/transport_tests.rs

@@ -118,8 +118,6 @@ async fn test_posteo_alias() -> Result<()> {
     t.set_config(Config::ConfiguredSendUser, Some(user)).await?;
     t.set_config(Config::ConfiguredSendPw, Some("foobarbaz"))
         .await?;
-    t.set_config(Config::ConfiguredSmtpCertificateChecks, Some("1"))
-        .await?; // Strict
     t.set_config(Config::ConfiguredServerFlags, Some("0"))
         .await?;
 
@@ -207,8 +205,6 @@ async fn test_empty_server_list_legacy() -> Result<()> {
         .await?; // Strict
     t.set_config(Config::ConfiguredSendPw, Some("foobarbaz"))
         .await?;
-    t.set_config(Config::ConfiguredSmtpCertificateChecks, Some("1"))
-        .await?; // Strict
     t.set_config(Config::ConfiguredServerFlags, Some("0"))
         .await?;
 

standards.md

@@ -13,6 +13,7 @@ Filename encoding                | Encoded Words ([RFC 2047][]), Encoded Word Ex
 Identify server folders          | IMAP LIST Extension ([RFC 6154][])
 Push                             | IMAP IDLE ([RFC 2177][])
 Quota                            | IMAP QUOTA extension ([RFC 2087][])
+Seen status synchronization      | IMAP CONDSTORE extension ([RFC 7162][])
 Client/server identification     | IMAP ID extension ([RFC 2971][])
 Authorization                    | OAuth2 ([RFC 6749][])
 End-to-end encryption            | [Autocrypt Level 1][], OpenPGP ([RFC 4880][]), Security Multiparts for MIME ([RFC 1847][]) and [“Mixed Up” Encryption repairing](https://datatracker.ietf.org/doc/html/draft-dkg-openpgp-pgpmime-message-mangling-00)