Fix mail sending

The error was due to the utilization of the special character “—” in the
subject, with postfix’ sendmail.

Also directly use process commands to get async support.

6 files changed, 138 insertions, 552 deletions

diff --git a/Cargo.lock b/Cargo.lock
index f40e23e..2aa159c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -14,7 +14,7 @@ checksum = "a75b7e6a93ecd6dbd2c225154d0fa7f86205574ecaa6c87429fb5f66ee677c44"
 dependencies = [
  "getrandom 0.2.0",
  "lazy_static",
- "version_check 0.9.2",
+ "version_check",
 ]
 
 [[package]]
@@ -42,12 +42,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
 
 [[package]]
-name = "ascii_utils"
-version = "0.9.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "71938f30533e4d95a6d17aa530939da3842c2ab6f4f84b9dae68447e4129f74a"
-
-[[package]]
 name = "atoi"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -69,37 +63,12 @@ dependencies = [
 
 [[package]]
 name = "autocfg"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
-
-[[package]]
-name = "autocfg"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
 [[package]]
 name = "base64"
-version = "0.9.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "489d6c0ed21b11d038c31b6ceccca973e65d73ba3bd8ecb9a2babf5546164643"
-dependencies = [
- "byteorder",
- "safemem",
-]
-
-[[package]]
-name = "base64"
-version = "0.10.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b25d992356d2eb0ed82172f5248873db5560c4721f564b13cb5193bda5e668e"
-dependencies = [
- "byteorder",
-]
-
-[[package]]
-name = "base64"
 version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3441f0f7b02788e948e47f457ca01f1d7e6d92c693bc132c22b087d3141c03ff"
@@ -197,8 +166,6 @@ dependencies = [
  "chrono",
  "env_logger",
  "hyper",
- "lettre",
- "lettre_email",
  "log",
  "serde",
  "serde_json",
@@ -211,16 +178,10 @@ dependencies = [
  "tokio",
  "tokio-util",
  "url",
- "uuid 0.8.1",
+ "uuid",
 ]
 
 [[package]]
-name = "bufstream"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "40e38929add23cdf8a366df9b0e088953150724bcbe5fc330b0d8eb3b328eec8"
-
-[[package]]
 name = "build_const"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -328,31 +289,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "cloudabi"
-version = "0.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
-dependencies = [
- "bitflags",
-]
-
-[[package]]
-name = "core-foundation"
-version = "0.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a89e2ae426ea83155dccf10c0fa6b1463ef6d5fcb44cee0b224a408fa640a62"
-dependencies = [
- "core-foundation-sys",
- "libc",
-]
-
-[[package]]
-name = "core-foundation-sys"
-version = "0.8.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea221b5284a47e40033bf9b66f35f984ec0ea2931eb03505246cd27a963f981b"
-
-[[package]]
 name = "cpuid-bool"
 version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -393,7 +329,7 @@ version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "02d96d1e189ef58269ebe5b97953da3274d83a93af647c2ddd6f9dab28cedb8d"
 dependencies = [
- "autocfg 1.0.1",
+ "autocfg",
  "cfg-if 1.0.0",
  "lazy_static",
 ]
@@ -435,85 +371,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
 
 [[package]]
-name = "email"
-version = "0.0.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91549a51bb0241165f13d57fc4c72cef063b4088fb078b019ecbf464a45f22e4"
-dependencies = [
- "base64 0.9.3",
- "chrono",
- "encoding",
- "lazy_static",
- "rand 0.4.6",
- "time",
- "version_check 0.1.5",
-]
-
-[[package]]
-name = "encoding"
-version = "0.2.33"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b0d943856b990d12d3b55b359144ff341533e516d94098b1d3fc1ac666d36ec"
-dependencies = [
- "encoding-index-japanese",
- "encoding-index-korean",
- "encoding-index-simpchinese",
- "encoding-index-singlebyte",
- "encoding-index-tradchinese",
-]
-
-[[package]]
-name = "encoding-index-japanese"
-version = "1.20141219.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04e8b2ff42e9a05335dbf8b5c6f7567e5591d0d916ccef4e0b1710d32a0d0c91"
-dependencies = [
- "encoding_index_tests",
-]
-
-[[package]]
-name = "encoding-index-korean"
-version = "1.20141219.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4dc33fb8e6bcba213fe2f14275f0963fd16f0a02c878e3095ecfdf5bee529d81"
-dependencies = [
- "encoding_index_tests",
-]
-
-[[package]]
-name = "encoding-index-simpchinese"
-version = "1.20141219.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d87a7194909b9118fc707194baa434a4e3b0fb6a5a757c73c3adb07aa25031f7"
-dependencies = [
- "encoding_index_tests",
-]
-
-[[package]]
-name = "encoding-index-singlebyte"
-version = "1.20141219.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3351d5acffb224af9ca265f435b859c7c01537c0849754d3db3fdf2bfe2ae84a"
-dependencies = [
- "encoding_index_tests",
-]
-
-[[package]]
-name = "encoding-index-tradchinese"
-version = "1.20141219.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd0e20d5688ce3cab59eb3ef3a2083a5c77bf496cb798dc6fcdb75f323890c18"
-dependencies = [
- "encoding_index_tests",
-]
-
-[[package]]
-name = "encoding_index_tests"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a246d82be1c9d791c5dfde9a2bd045fc3cbba3fa2b11ad558f27d01712f00569"
-
-[[package]]
 name = "env_logger"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -533,36 +390,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
 
 [[package]]
-name = "fast_chemail"
-version = "0.9.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "495a39d30d624c2caabe6312bfead73e7717692b44e0b32df168c275a2e8e9e4"
-dependencies = [
- "ascii_utils",
-]
-
-[[package]]
 name = "fnv"
 version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
 [[package]]
-name = "foreign-types"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
-dependencies = [
- "foreign-types-shared",
-]
-
-[[package]]
-name = "foreign-types-shared"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
-
-[[package]]
 name = "form_urlencoded"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -573,12 +406,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "fuchsia-cprng"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
-
-[[package]]
 name = "fuchsia-zircon"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -711,7 +538,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "501466ecc8a30d1d3b7fc9229b122b2ce8ed6e9d9223f1138d4babb253e51817"
 dependencies = [
  "typenum",
- "version_check 0.9.2",
+ "version_check",
 ]
 
 [[package]]
@@ -823,16 +650,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "644f9158b2f133fd50f5fb3242878846d9eb792e445c893805ff0e3824006e35"
 
 [[package]]
-name = "hostname"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21ceb46a83a85e824ef93669c8b390009623863b5c195d1ba747292c0c72f94e"
-dependencies = [
- "libc",
- "winutil",
-]
-
-[[package]]
 name = "http"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -936,7 +753,7 @@ version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4fb1fa934250de4de8aef298d81c729a7d33d8c239daa3a7575e6b92bfc7313b"
 dependencies = [
- "autocfg 1.0.1",
+ "autocfg",
  "hashbrown",
 ]
 
@@ -990,38 +807,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
-name = "lettre"
-version = "0.9.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "338d9a248c4b3ef60c51941c678bb8f64e244c0a98f1eb71db027d1e777a5700"
-dependencies = [
- "base64 0.10.1",
- "bufstream",
- "fast_chemail",
- "hostname",
- "log",
- "native-tls",
- "nom 4.2.3",
- "serde",
- "serde_derive",
- "serde_json",
-]
-
-[[package]]
-name = "lettre_email"
-version = "0.9.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd02480f8dcf48798e62113974d6ccca2129a51d241fa20f1ea349c8a42559d5"
-dependencies = [
- "base64 0.10.1",
- "email",
- "lettre",
- "mime",
- "time",
- "uuid 0.7.4",
-]
-
-[[package]]
 name = "lexical-core"
 version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1088,12 +873,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
 
 [[package]]
-name = "mime"
-version = "0.3.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2a60c7ce501c71e03a9c9c0d35b861413ae925bd979cc7a4e30d060069aaac8d"
-
-[[package]]
 name = "mio"
 version = "0.6.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1106,13 +885,25 @@ dependencies = [
  "kernel32-sys",
  "libc",
  "log",
- "miow",
+ "miow 0.2.2",
  "net2",
  "slab",
  "winapi 0.2.8",
 ]
 
 [[package]]
+name = "mio-named-pipes"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0840c1c50fd55e521b247f949c241c9997709f23bd7f023b9762cd561e935656"
+dependencies = [
+ "log",
+ "mio",
+ "miow 0.3.6",
+ "winapi 0.3.9",
+]
+
+[[package]]
 name = "mio-uds"
 version = "0.6.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1136,21 +927,13 @@ dependencies = [
 ]
 
 [[package]]
-name = "native-tls"
-version = "0.2.7"
+name = "miow"
+version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8d96b2e1c8da3957d58100b09f102c6d9cfdfced01b7ec5a8974044bb09dbd4"
+checksum = "5a33c1b55807fbed163481b5ba66db4b2fa6cde694a5027be10fb724206c5897"
 dependencies = [
- "lazy_static",
- "libc",
- "log",
- "openssl",
- "openssl-probe",
- "openssl-sys",
- "schannel",
- "security-framework",
- "security-framework-sys",
- "tempfile",
+ "socket2",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -1166,16 +949,6 @@ dependencies = [
 
 [[package]]
 name = "nom"
-version = "4.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2ad2a91a8e869eeb30b9cb3119ae87773a8f4ae617f41b1eb9c154b2905f7bd6"
-dependencies = [
- "memchr",
- "version_check 0.1.5",
-]
-
-[[package]]
-name = "nom"
 version = "6.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "88034cfd6b4a0d54dd14f4a507eceee36c0b70e5a02236c4e4df571102be17f0"
@@ -1183,7 +956,7 @@ dependencies = [
  "bitvec",
  "lexical-core",
  "memchr",
- "version_check 0.9.2",
+ "version_check",
 ]
 
 [[package]]
@@ -1192,7 +965,7 @@ version = "0.1.44"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d2cc698a63b549a70bc047073d2949cce27cd1c7b0a4a862d08a8031bc2801db"
 dependencies = [
- "autocfg 1.0.1",
+ "autocfg",
  "num-traits",
 ]
 
@@ -1202,7 +975,7 @@ version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
 dependencies = [
- "autocfg 1.0.1",
+ "autocfg",
 ]
 
 [[package]]
@@ -1234,39 +1007,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
 
 [[package]]
-name = "openssl"
-version = "0.10.32"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "038d43985d1ddca7a9900630d8cd031b56e4794eecc2e9ea39dd17aa04399a70"
-dependencies = [
- "bitflags",
- "cfg-if 1.0.0",
- "foreign-types",
- "lazy_static",
- "libc",
- "openssl-sys",
-]
-
-[[package]]
-name = "openssl-probe"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77af24da69f9d9341038eba93a073b1fdaaa1b788221b00a69bce9e762cb32de"
-
-[[package]]
-name = "openssl-sys"
-version = "0.9.60"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "921fc71883267538946025deffb622905ecad223c28efbfdef9bb59a0175f3e6"
-dependencies = [
- "autocfg 1.0.1",
- "cc",
- "libc",
- "pkg-config",
- "vcpkg",
-]
-
-[[package]]
 name = "parking_lot"
 version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1429,7 +1169,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "syn",
- "version_check 0.9.2",
+ "version_check",
 ]
 
 [[package]]
@@ -1440,7 +1180,7 @@ checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
 dependencies = [
  "proc-macro2",
  "quote",
- "version_check 0.9.2",
+ "version_check",
 ]
 
 [[package]]
@@ -1481,38 +1221,6 @@ checksum = "941ba9d78d8e2f7ce474c015eea4d9c6d25b6a3327f9832ee29a4de27f91bbb8"
 
 [[package]]
 name = "rand"
-version = "0.4.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "552840b97013b1a26992c11eac34bdd778e464601a4c2054b5f0bff7c6761293"
-dependencies = [
- "fuchsia-cprng",
- "libc",
- "rand_core 0.3.1",
- "rdrand",
- "winapi 0.3.9",
-]
-
-[[package]]
-name = "rand"
-version = "0.6.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d71dacdc3c88c1fde3885a3be3fbab9f35724e6ce99467f7d9c5026132184ca"
-dependencies = [
- "autocfg 0.1.7",
- "libc",
- "rand_chacha 0.1.1",
- "rand_core 0.4.2",
- "rand_hc 0.1.0",
- "rand_isaac",
- "rand_jitter",
- "rand_os",
- "rand_pcg",
- "rand_xorshift",
- "winapi 0.3.9",
-]
-
-[[package]]
-name = "rand"
 version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6a6b1679d49b24bbfe0c803429aa1874472f50d9b363131f0e89fc356b544d03"
@@ -1538,16 +1246,6 @@ dependencies = [
 
 [[package]]
 name = "rand_chacha"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "556d3a1ca6600bfcbab7c7c91ccb085ac7fbbcd70e008a98742e7847f4f7bcef"
-dependencies = [
- "autocfg 0.1.7",
- "rand_core 0.3.1",
-]
-
-[[package]]
-name = "rand_chacha"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f4c8ed856279c9737206bf725bf36935d8666ead7aa69b52be55af369d193402"
@@ -1568,21 +1266,6 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
-dependencies = [
- "rand_core 0.4.2",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
-
-[[package]]
-name = "rand_core"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
@@ -1601,15 +1284,6 @@ dependencies = [
 
 [[package]]
 name = "rand_hc"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b40677c7be09ae76218dc623efbf7b18e34bced3f38883af07bb75630a21bc4"
-dependencies = [
- "rand_core 0.3.1",
-]
-
-[[package]]
-name = "rand_hc"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
@@ -1627,68 +1301,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "rand_isaac"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ded997c9d5f13925be2a6fd7e66bf1872597f759fd9dd93513dd7e92e5a5ee08"
-dependencies = [
- "rand_core 0.3.1",
-]
-
-[[package]]
-name = "rand_jitter"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1166d5c91dc97b88d1decc3285bb0a99ed84b05cfd0bc2341bdf2d43fc41e39b"
-dependencies = [
- "libc",
- "rand_core 0.4.2",
- "winapi 0.3.9",
-]
-
-[[package]]
-name = "rand_os"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"
-dependencies = [
- "cloudabi",
- "fuchsia-cprng",
- "libc",
- "rand_core 0.4.2",
- "rdrand",
- "winapi 0.3.9",
-]
-
-[[package]]
-name = "rand_pcg"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "abf9b09b01790cfe0364f52bf32995ea3c39f4d2dd011eac241d2914146d0b44"
-dependencies = [
- "autocfg 0.1.7",
- "rand_core 0.4.2",
-]
-
-[[package]]
-name = "rand_xorshift"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cbf7e9e623549b0e21f6e97cf8ecf247c1a8fd2e8a992ae265314300b2455d5c"
-dependencies = [
- "rand_core 0.3.1",
-]
-
-[[package]]
-name = "rdrand"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
-dependencies = [
- "rand_core 0.3.1",
-]
-
-[[package]]
 name = "redox_syscall"
 version = "0.1.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1713,15 +1325,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3b181ba2dcf07aaccad5448e8ead58db5b742cf85dfe035e2227f137a539a189"
 
 [[package]]
-name = "remove_dir_all"
-version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
-dependencies = [
- "winapi 0.3.9",
-]
-
-[[package]]
 name = "ring"
 version = "0.16.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1756,12 +1359,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
 
 [[package]]
-name = "safemem"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef703b7cb59335eae2eb93ceb664c0eb7ea6bf567079d843e09420219668e072"
-
-[[package]]
 name = "same-file"
 version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1771,16 +1368,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "schannel"
-version = "0.1.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f05ba609c234e60bee0d547fe94a4c7e9da733d1c962cf6e59efa4cd9c8bc75"
-dependencies = [
- "lazy_static",
- "winapi 0.3.9",
-]
-
-[[package]]
 name = "scopeguard"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1797,29 +1384,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "security-framework"
-version = "2.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1759c2e3c8580017a484a7ac56d3abc5a6c1feadf88db2f3633f12ae4268c69"
-dependencies = [
- "bitflags",
- "core-foundation",
- "core-foundation-sys",
- "libc",
- "security-framework-sys",
-]
-
-[[package]]
-name = "security-framework-sys"
-version = "2.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f99b9d5e26d2a71633cc4f2ebae7cc9f874044e0c351a27e17892d76dce5678b"
-dependencies = [
- "core-foundation-sys",
- "libc",
-]
-
-[[package]]
 name = "semver"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1908,6 +1472,15 @@ dependencies = [
 ]
 
 [[package]]
+name = "signal-hook-registry"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "16f1d0fef1604ba8f7a073c7e701f213e056707210e9020af4528e0101ce11a6"
+dependencies = [
+ "libc",
+]
+
+[[package]]
 name = "slab"
 version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1953,7 +1526,7 @@ checksum = "74c70f0235b9925cbb106c52af1a28b5ea4885a8b851e328b8562e257a389c2d"
 dependencies = [
  "lazy_static",
  "maplit",
- "nom 6.0.1",
+ "nom",
  "regex",
  "unicode_categories",
 ]
@@ -2107,20 +1680,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "36474e732d1affd3a6ed582781b3683df3d0563714c59c39591e8ff707cf078e"
 
 [[package]]
-name = "tempfile"
-version = "3.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
-dependencies = [
- "cfg-if 0.1.10",
- "libc",
- "rand 0.7.3",
- "redox_syscall",
- "remove_dir_all",
- "winapi 0.3.9",
-]
-
-[[package]]
 name = "tera"
 version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2229,11 +1788,14 @@ dependencies = [
  "libc",
  "memchr",
  "mio",
+ "mio-named-pipes",
  "mio-uds",
  "num_cpus",
  "pin-project-lite 0.1.11",
+ "signal-hook-registry",
  "slab",
  "tokio-macros",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -2440,15 +2002,6 @@ dependencies = [
 
 [[package]]
 name = "uuid"
-version = "0.7.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90dbc611eb48397705a6b0f6e917da23ae517e4d127123d2cf7674206627d32a"
-dependencies = [
- "rand 0.6.5",
-]
-
-[[package]]
-name = "uuid"
 version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9fde2f6a4bea1d6e007c4ad38c6839fa71cbb63b6dbf5b595aa38dc9b1093c11"
@@ -2470,12 +2023,6 @@ checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 
 [[package]]
 name = "version_check"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
-
-[[package]]
-name = "version_check"
 version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
@@ -2650,15 +2197,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
 [[package]]
-name = "winutil"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7daf138b6b14196e3830a588acf1e86966c694d3e8fb026fb105b8b5dca07e6e"
-dependencies = [
- "winapi 0.3.9",
-]
-
-[[package]]
 name = "ws2_32-sys"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/Cargo.toml b/Cargo.toml
index 3ae6867..db6a0d9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,8 +9,6 @@ bcrypt = "0.9"
 chrono = "0.4"
 env_logger = "0.8"
 hyper = "0.13"
-lettre = "0.9"
-lettre_email = "0.9"
 log = "0.4"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
@@ -20,7 +18,7 @@ sqlx = { version = "0.4", features = ["runtime-tokio-rustls", "sqlite", "chrono"
 sqlx-core = "0.4"
 structopt = "0.3"
 tera = { version = "1.6", features = ["builtins"] }
-tokio = { version = "0.2", features = ["macros", "sync", "rt-threaded"] }
+tokio = { version = "0.2", features = ["macros", "sync", "rt-threaded", "process"] }
 tokio-util = { version = "0.3", features = ["codec"] }
 url = "2.2"
 uuid = { version = "0.8", features = ["v4"] }
diff --git a/config.json b/config.json
index 86a19b5..488b2f9 100644
--- a/config.json
+++ b/config.json
@@ -1,3 +1,4 @@
 {
-  "secure_cookies": false
+  "secure_cookies": false,
+  "mock_mails": true
 }
diff --git a/src/jobs/weekly_report.rs b/src/jobs/weekly_report.rs
index 819d30b..b482f0d 100644
--- a/src/jobs/weekly_report.rs
+++ b/src/jobs/weekly_report.rs
@@ -17,10 +17,17 @@ pub async fn send(
             let users = db::users::list(pool).await;
             mail::send(
                 config,
-                users.into_iter().map(|u| (u.email, u.name)).collect(),
-                "Budget — rapport hebdomadaire".to_string(),
+                users
+                    .into_iter()
+                    .map(|u| mail::Recipient {
+                        name: u.name,
+                        address: u.email,
+                    })
+                    .collect(),
+                "Rapport hebdomadaire".to_string(),
                 report,
             )
+            .await
         }
         Err(err) => {
             error!("Error preparing weekly report from template: {:?}", err);
diff --git a/src/mail.rs b/src/mail.rs
index 52b5789..149a5ef 100644
--- a/src/mail.rs
+++ b/src/mail.rs
@@ -1,59 +1,101 @@
-use lettre::sendmail::SendmailTransport;
-use lettre::{SendableEmail, Transport};
-use lettre_email::Email;
+use chrono::Utc;
+use std::io::{Error, ErrorKind};
+use std::process::{Output, Stdio};
+use tokio::io::AsyncWriteExt;
+use tokio::process::Command;
 
 use crate::model::config::Config;
 
-static FROM: &str = "contact@guyonvarch.me";
+static FROM_NAME: &str = "Budget";
+static FROM_ADDRESS: &str = "budget@guyonvarch.me";
 
-pub fn send(
+#[derive(Clone)]
+pub struct Recipient {
+    pub name: String,
+    pub address: String,
+}
+
+pub async fn send(
     config: &Config,
-    to: Vec<(String, String)>,
+    recipients: Vec<Recipient>,
     subject: String,
     message: String,
 ) -> bool {
-    match prepare_email(to.clone(), subject.clone(), message.clone()) {
-        Ok(email) => {
-            if let Some(sendmail_path) = &config.sendmail_path {
-                let mut sender =
-                    SendmailTransport::new_with_command(sendmail_path);
-                match sender.send(email) {
-                    Ok(_) => true,
-                    Err(err) => {
-                        error!("Error sending email: {:?}", err);
-                        false
-                    }
+    let headers = format_headers(recipients.clone(), subject);
+
+    info!(
+        "Sending mail{}\n{}",
+        if config.mock_mails { " (MOCK)" } else { "" },
+        headers.clone()
+    );
+
+    if config.mock_mails {
+        true
+    } else {
+        let recipient_addresses = recipients
+            .clone()
+            .into_iter()
+            .map(|r| r.address)
+            .collect::<Vec<String>>();
+
+        let mut command = Command::new("sendmail");
+        command.kill_on_drop(true);
+        command.arg("-f").arg(FROM_ADDRESS);
+        command.arg("--").args(recipient_addresses);
+        command
+            .stdin(Stdio::piped())
+            .stdout(Stdio::piped())
+            .stderr(Stdio::piped());
+
+        let message = format!("{}\n\n{}", headers, message);
+        match spawn(command, &message.into_bytes()).await {
+            Ok(output) => {
+                if output.status.success() {
+                    info!("Mail sent");
+                    true
+                } else {
+                    match String::from_utf8(output.stderr) {
+                        Ok(error) => error!("Error sending email: {}", error),
+                        _ => error!("Error sending email"),
+                    };
+                    false
                 }
-            } else {
-                let formatted_to = to
-                    .into_iter()
-                    .map(|t| t.0)
-                    .collect::<Vec<String>>()
-                    .join(", ");
-                info!(
-                    "MOCK MAIL\nto: {}\nsubject: {}\n\n{}",
-                    formatted_to, subject, message
-                );
-                true
             }
-        }
-        Err(err) => {
-            error!("Error preparing email: {:?}", err);
-            false
+            Err(err) => {
+                error!("Error spawning command: {:?}", err);
+                false
+            }
         }
     }
 }
 
-fn prepare_email(
-    to: Vec<(String, String)>,
-    subject: String,
-    message: String,
-) -> Result<SendableEmail, lettre_email::error::Error> {
-    let mut email = Email::builder().from(FROM).subject(subject).text(message);
+fn format_headers(recipients: Vec<Recipient>, subject: String) -> String {
+    let recipients = recipients
+        .into_iter()
+        .map(|r| format_address(r.name, r.address))
+        .collect::<Vec<String>>()
+        .join(", ");
 
-    for (address, name) in to.iter() {
-        email = email.to((address, name));
-    }
+    format!(
+        "Date: {}\nFrom: {}\nTo: {}\nSubject: {}",
+        Utc::now().to_rfc2822(),
+        format_address(FROM_NAME.to_string(), FROM_ADDRESS.to_string()),
+        recipients,
+        subject,
+    )
+}
+
+fn format_address(name: String, address: String) -> String {
+    format!("{} <{}>", name, address)
+}
 
-    email.build().map(|e| e.into())
+async fn spawn(mut command: Command, stdin: &Vec<u8>) -> Result<Output, Error> {
+    let mut process = command.spawn()?;
+    process
+        .stdin
+        .as_mut()
+        .ok_or(Error::new(ErrorKind::Other, "Getting mutable stdin"))?
+        .write_all(stdin)
+        .await?;
+    process.wait_with_output().await
 }
diff --git a/src/model/config.rs b/src/model/config.rs
index 2c5455e..cebe1a6 100644
--- a/src/model/config.rs
+++ b/src/model/config.rs
@@ -3,5 +3,5 @@ use serde::Deserialize;
 #[derive(Clone, Deserialize)]
 pub struct Config {
     pub secure_cookies: bool,
-    pub sendmail_path: Option<String>,
+    pub mock_mails: bool,
 }