diff --git a/Cargo.lock b/Cargo.lock
index bd4497790..6b098a71e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -195,15 +195,6 @@ dependencies = [
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "base64"
-version = "0.9.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "safemem 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "base64"
 version = "0.10.1"
@@ -622,7 +613,7 @@ dependencies = [
  "async-std 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "async-tls 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)",
- "base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "charset 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -636,8 +627,8 @@ dependencies = [
  "image-meta 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "lettre 0.9.2 (git+https://github.com/deltachat/lettre?branch=feat/rustls)",
- "lettre_email 0.9.2 (git+https://github.com/deltachat/lettre?branch=feat/rustls)",
+ "lettre 0.9.2 (git+https://github.com/deltachat/lettre?branch=feat/mail)",
+ "lettre_email 0.9.2 (git+https://github.com/deltachat/lettre?branch=feat/mail)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "mailparse 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -793,16 +784,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "email"
-version = "0.0.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
+version = "0.0.21"
+source = "git+https://github.com/deltachat/rust-email#5fb7dac53e7e0014a8c5715017be3360aa83646c"
 dependencies = [
- "base64 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "encoding 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
- "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1407,9 +1398,9 @@ dependencies = [
 [[package]]
 name = "lettre"
 version = "0.9.2"
-source = "git+https://github.com/deltachat/lettre?branch=feat/rustls#a422872e92e8cf089bdfb24489f3446f9865ba19"
+source = "git+https://github.com/deltachat/lettre?branch=feat/mail#0f393a3d1d3860183c5df97b4429d0919199344a"
 dependencies = [
- "base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bufstream 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "fast_chemail 0.9.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "hostname 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1426,11 +1417,11 @@ dependencies = [
 [[package]]
 name = "lettre_email"
 version = "0.9.2"
-source = "git+https://github.com/deltachat/lettre?branch=feat/rustls#a422872e92e8cf089bdfb24489f3446f9865ba19"
+source = "git+https://github.com/deltachat/lettre?branch=feat/mail#0f393a3d1d3860183c5df97b4429d0919199344a"
 dependencies = [
- "base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "email 0.0.20 (registry+https://github.com/rust-lang/crates.io-index)",
- "lettre 0.9.2 (git+https://github.com/deltachat/lettre?branch=feat/rustls)",
+ "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "email 0.0.21 (git+https://github.com/deltachat/rust-email)",
+ "lettre 0.9.2 (git+https://github.com/deltachat/lettre?branch=feat/mail)",
  "mime 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "uuid 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3378,7 +3369,6 @@ dependencies = [
 "checksum backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)" = "5d6575f128516de27e3ce99689419835fce9643a9b215a14d2b5b685be018491"
 "checksum base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0b25d992356d2eb0ed82172f5248873db5560c4721f564b13cb5193bda5e668e"
 "checksum base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b41b7ea54a0c9d92199de89e20e58d49f02f8e699814ef3fdf266f6f748d15c7"
-"checksum base64 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)" = "489d6c0ed21b11d038c31b6ceccca973e65d73ba3bd8ecb9a2babf5546164643"
 "checksum bit-set 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e84c238982c4b1e1ee668d136c510c67a13465279c0cb367ea6baf6310620a80"
 "checksum bit-vec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f59bbe95d4e52a6398ec21238d31577f2b28a9d86807f06ca59d191d8440d0bb"
 "checksum bitfield 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)" = "46afbd2983a5d5a7bd740ccb198caf5b82f45c40c09c0eed36052d91cb92e719"
@@ -3437,7 +3427,7 @@ dependencies = [
 "checksum dtoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "ea57b42383d091c85abcc2706240b94ab2a8fa1fc81c10ff23c4de06e2a90b5e"
 "checksum ed25519-dalek 1.0.0-pre.2 (registry+https://github.com/rust-lang/crates.io-index)" = "845aaacc16f01178f33349e7c992ecd0cee095aa5e577f0f4dee35971bd36455"
 "checksum either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "bb1f6b1ce1c140482ea30ddd3335fc0024ac7ee112895426e0a629a6c20adfe3"
-"checksum email 0.0.20 (registry+https://github.com/rust-lang/crates.io-index)" = "91549a51bb0241165f13d57fc4c72cef063b4088fb078b019ecbf464a45f22e4"
+"checksum email 0.0.21 (git+https://github.com/deltachat/rust-email)" = "<none>"
 "checksum encoding 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)" = "6b0d943856b990d12d3b55b359144ff341533e516d94098b1d3fc1ac666d36ec"
 "checksum encoding-index-japanese 1.20141219.5 (registry+https://github.com/rust-lang/crates.io-index)" = "04e8b2ff42e9a05335dbf8b5c6f7567e5591d0d916ccef4e0b1710d32a0d0c91"
 "checksum encoding-index-korean 1.20141219.5 (registry+https://github.com/rust-lang/crates.io-index)" = "4dc33fb8e6bcba213fe2f14275f0963fd16f0a02c878e3095ecfdf5bee529d81"
@@ -3508,8 +3498,8 @@ dependencies = [
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
 "checksum kv-log-macro 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8c54d9f465d530a752e6ebdc217e081a7a614b48cb200f6f0aee21ba6bc9aabb"
 "checksum lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
-"checksum lettre 0.9.2 (git+https://github.com/deltachat/lettre?branch=feat/rustls)" = "<none>"
-"checksum lettre_email 0.9.2 (git+https://github.com/deltachat/lettre?branch=feat/rustls)" = "<none>"
+"checksum lettre 0.9.2 (git+https://github.com/deltachat/lettre?branch=feat/mail)" = "<none>"
+"checksum lettre_email 0.9.2 (git+https://github.com/deltachat/lettre?branch=feat/mail)" = "<none>"
 "checksum lexical-core 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "2304bccb228c4b020f3a4835d247df0a02a7c4686098d4167762cfbbe4c5cb14"
 "checksum libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)" = "d515b1f41455adea1313a4a2ac8a8a477634fbae63cc6100e3aebb207ce61558"
 "checksum libm 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7fc7aa29613bd6a620df431842069224d8bc9011086b1db4c0e0cd47fa03ec9a"
diff --git a/Cargo.toml b/Cargo.toml
index 5d364b7f9..4b9febc27 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,12 +17,12 @@ 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"
-lettre = { git = "https://github.com/deltachat/lettre", branch = "feat/rustls" }
-lettre_email = { git = "https://github.com/deltachat/lettre", branch = "feat/rustls" }
+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 = "0.10"
+base64 = "0.11"
 charset = "0.1"
 percent-encoding = "2.0"
 serde = { version = "1.0", features = ["derive"] }