05cbf2908c
feat: Add experimental option to disable mailboxes ( #108 )
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Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-04-01 23:05:02 +02:00
fb77c5be81
feat(resolver): Enable DNSSEC ( #94 )
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From hickory-resolver docs:
> To enable DNSSEC, enable the dnssec-ring feature.
Related: https://github.com/chatmail/relay/issues/877
Related: https://github.com/hickory-dns/hickory-dns/issues/3519
Closes: https://github.com/chatmail/filtermail/issues/93
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-03-24 08:27:48 +01:00
9a4a54cea8
refactor: derive Default for Envelope ( #100 )
2026-03-16 10:01:52 +01:00
49df79bfa0
feat: configurable hosts for listen and reinject ( #84 )
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Adds configurable listen IP and postfix host
via `filtermail_host` and `postfix_host` chatmail.ini config fields.
2026-03-13 17:04:44 +01:00
8dd9436a0d
feat!: Remove IP verification for domain-literals ( #90 )
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BREAKING CHANGE: messages using domain-literal
addresses don't require to match the origin
SMTP connection IP anymore.
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-03-13 12:25:45 +01:00
c088cbfe4d
refactor: use enum for mode cli arg ( #83 )
2026-03-05 10:17:37 +01:00
82618de311
feat: Check incoming email return address ( #72 )
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If the MAIL FROM doesn't match the From header,
we do not reject the mail, as this can be caused
by e.g. SRS forwarding. Instead, we reset the envelope
address, so it is reinjected as `MAIL FROM:<>`
to prevent sending a bounce message.
Closes #67
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-25 16:20:08 +01:00
a5c6880ceb
refactor: Check if email is encrypted before verifying DKIM ( #71 )
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This way we won't be logging DKIM rejections on messages that
would be rejected anyway due to not being encrypted.
Fixes #69
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-25 16:10:01 +01:00
2e1c38466c
fix(logs): Log correct address for outbound messages ( #70 )
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Fixes #68
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-25 16:08:41 +01:00
e1841cb590
fix(logs): Log From address instead of envelope MAIL FROM. ( #66 )
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Fixes #64
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-24 11:58:28 +01:00
52208c42b6
fix(dkim): Accept TXT records with escaped quotes ( #61 )
2026-02-24 08:12:17 +01:00
8a1684d488
fix(smtp): Properly handle bounce messages ( #63 )
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Closes #58
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-23 19:45:21 +01:00
6145be4108
fix(dkim): Accept TXT records with no v= tag ( #62 )
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Cache at most 3 TXT records instead of trying to find one that includes `DKIM`.
Closes #59
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-23 19:44:30 +01:00
54982b1fdd
feat: Save rejected messages to /tmp ( #55 )
2026-02-20 15:38:46 +01:00
94f1b29917
refactor: do not copy the mail in memory for DKIM verification ( #54 )
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`String::from_utf8_lossy` always copies the data
for the case when it needs to replace invalid UTF-8,
but we don't want invalid UTF-8 anyway as replacing
invalid UTF-8 characters will break DKIM signature.
2026-02-19 19:06:08 +01:00
7d4fac698f
fix(dkim): Make simple header canonicalization work properly ( #53 )
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Previously header parsing caused leading whitespaces to be
trimmed in HeaderBody, which resulted in incorrect simple
header canonicalization.
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-19 14:33:40 +01:00
6e2a37956c
chore(tests): Add a way to disable DKIM for tests ( #50 )
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Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-17 13:00:31 +01:00
4837754245
feat: Support addresses using domain literals ( #42 )
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If the incoming email comes from address that uses
domain literals `[<ipv4>]` or `[IPv6:<ipv6>]`,
skip DKIM verification and instead check IP
alignment with originating IP from XFORWARD
command.
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-16 18:25:21 +01:00
a096d0550f
feat!: DKIM verifier ( #35 )
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* feat!: DKIM verifier
This implements a DKIM verification as well as a strict
DKIM signature alignment check with domain in `From`
header address.
Caches the retrieved RDATA using in-memory LRU.
BREAKING CHANGE: incoming messages now require DKIM signatures
aligned to domain of the `From` header address.
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
* chore(license): License binaries under GPLv3
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
---------
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-16 09:50:55 +01:00
cc1604b0b2
feat: Support legacy, pre-OpenPGP packet format ( #44 )
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Support legacy packet format for compatibility with GnuPG.
Closes : #43
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-13 12:31:39 +01:00
0ee1e9924c
refactor: Use a custom, minimal SMTP client instead of lettre ( #33 )
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This disables the Nagle's algorithm on re-insertion.
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-06 11:15:14 +01:00
8d18b73681
refactor: Remove unnecessary Arc ( #36 )
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`Arc` around handler configs are not needed,
as they are not shared.
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-02-05 16:42:06 +01:00
23231d462c
feat: Configurable rate limiter max burst size ( #28 )
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Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-01-28 17:47:48 +01:00
aa5999cc25
refactor: remove Mutex around rate limiter
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Rate limiter handles all the necessary locking internally.
2026-01-26 17:59:12 +00:00
3be4c4d5ee
perf: disable Nagle's algorithm and do own buffering on server connections
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I don't know if Postfix as the client disables delayed ACKs,
but if delayed ACKs are enabled, Nagle's algorithm introduces unnecessary delays.
2026-01-26 14:56:36 +00:00
cab16fc8f1
fix: Make inbound/outbound log messages consistent ( #23 )
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Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-01-22 15:14:28 +01:00
ca6ccd9acf
fix: Set logs required by grafana to INFO ( #21 )
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Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-01-22 14:49:55 +01:00
b5a56a6a4e
perf: Use governor for rate limiting ( #20 )
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Fixes : #19
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-01-22 14:49:26 +01:00
9eb86b23ce
refactor: Apply more lints ( #17 )
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Sets lint rules and applies required changes.
Fixes : #16
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-01-21 16:28:24 +01:00
aab39be662
feat: Improve logging ( #13 )
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Improves logs and reduces verbosity.
Fixes : #8
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-01-21 14:35:52 +01:00
2b4205a60a
fix(config): Set default values for internal SMTP ports and max message size ( #12 )
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Fixes : #7
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-01-21 14:27:21 +01:00
c010d999f5
fix: Correct a typo in SMTP answer ( #11 )
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Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-01-21 14:26:20 +01:00
f2f7767b71
refactor: get rid of indexing and slicing in check_armored_payload() ( #15 )
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Indexing can potentially panic, without indexing
it is easier to make sure there will be no crash.
2026-01-21 14:25:40 +01:00
353f1dc77d
fix: Improve address extraction from SMTP commands ( #14 )
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Prevents extraction failing on SRS.
Fixes : #9
Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-01-21 14:06:20 +01:00
6340f479ae
feat: Initial implementation
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Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com >
2026-01-19 16:49:50 +01:00
Jagoda Estera Ślązak
Andrey 0xdc09
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Jagoda Ślązak