relay/filtermail/CHANGELOG.md

0.7.4 - 2026-07-01

Features

• (logs) Log incoming mailer-daemon message sources (#191)

Miscellaneous Tasks

• Update filtermail.mtail (#190)

Testing

• Place #[tokio::test] after rstest case macros (#192)

0.7.3 - 2026-06-27

Features

• (transport) Worker eviction (#185)

0.7.2 - 2026-06-26

Documentation

• (readme) Disable colors in mermaid diagrams (#180)
• (readme) Update Transport mode doc

Features

• (transport) Destination worker pool

Refactor

• Implement Display for AddressDomain

Testing

• Test filtermail-transport

0.7.1 - 2026-06-09

Bug Fixes

• Switch ratelimiter to MonotonicClock (#167)
• (smtp-server) Correct error when EOF while reading DATA (#168)
• (resolver) Disable negative caching (#170)
• Ignore CNAME records when resolving TXT records (#177)

Features

• Switch to aws-lc-rs cryptography provider (#178)

Miscellaneous Tasks

• Add filtermail.mtail so filtermail failures can be monitored (#169)

0.7.0 - 2026-05-26

Bug Fixes

• Do not crash if accepting new connection fails

Documentation

• (readme) Remove docs for options removed in da9a116 (#162)

Features

• [breaking] Remove passthrough options that allowed unencrypted mail to pass

0.6.6 - 2026-05-12

Bug Fixes

• Return HTTP 200 because madmail expects it, and make sure https is immediately retried when SMTP fails (#153)

Features

• Improved SMTP error responses (#147)

Miscellaneous Tasks

• Remove mac and windows from matrix tests (#154)
• Run cmlxc tests in all classic/classic-ipv4/madmail combinations

0.6.5 - 2026-05-12

Bug Fixes

• (smtp-client) Handle 421 on reused connection (#145)
• Advertise 8BITMIME to prevent conversion after DKIM signing (#149)
• Validate mail data (#150)

Miscellaneous Tasks

• Build and deploy relays with filtermail binary and run interop tests against madmail (#131)

Performance

• (smtp-client) Use pipelining if server advertises support (#146)

0.6.4 - 2026-05-01

Bug Fixes

• Implement missing "implicit MX" rule

Features

• Https transport channel (#122)

Refactor

• (transport) Explicitly handle RFC7505 null MX

0.6.3 - 2026-04-20

Features

• (smtp-server) Log malformed SMTP commands (#118)

Performance

• (smtp-client) Cache connections (#117)

0.6.2 - 2026-04-16

Documentation

• (readme) Reformat README.md (#115)

Features

• Log disabled recipients (#113)
• (transport) Remote delivery over SMTP (#104)

Miscellaneous Tasks

• (dependabot) Update configuration (#114)

0.6.1 - 2026-04-01

Documentation

• (readme) Fix typo (#99)

Features

• Configurable hosts for listen and reinject (#84)
• (resolver) Enable DNSSEC (#94)
• Add experimental option to disable mailboxes (#108)

Refactor

• Derive Default for Envelope (#100)

0.6.0 - 2026-03-13

Documentation

• (readme) Fix license link
• (readme) Clarify licensing of the binaries
• (readme) Improve README.md (#88)

Features

• [breaking] Remove IP verification for domain-literals (#90)

Miscellaneous Tasks

• (ci) Fix binary publish job (#79)

Refactor

• Use enum for mode cli arg (#83)

0.5.2 - 2026-02-27

Bug Fixes

• (logs) Log correct address for outbound messages (#70)

Features

• Check incoming email return address (#72)

Miscellaneous Tasks

• Bump cargo-dist (#73)
• (ci) Build and upload binaries in CI (#76)
• (ci) Add missing Zig dependency (#77)

Refactor

• Check if email is encrypted before verifying DKIM (#71)

0.5.1 - 2026-02-24

Bug Fixes

• (dkim) Accept TXT records with no v= tag (#62)
• (smtp) Properly handle bounce messages (#63)
• (dkim) Accept TXT records with escaped quotes (#61)
• (logs) Log From address instead of envelope MAIL FROM. (#66)

0.5.0 - 2026-02-20

Bug Fixes

• (dkim) Make simple header canonicalization work properly (#53)

Features

• Save rejected messages to /tmp (#55)

Refactor

• Do not copy the mail in memory for DKIM verification (#54)

0.4.1 - 2026-02-17

Miscellaneous Tasks

• (tests) Add a way to disable DKIM for tests (#50)

0.4.0 - 2026-02-17

Features

• [breaking] DKIM verifier (#35)
• Support addresses using domain literals (#42)

0.3.0 - 2026-02-14

Features

• Support legacy, pre-OpenPGP packet format (#44)

Miscellaneous Tasks

• (dist) Switch to musl targets (#31)

Refactor

• Remove unnecessary Arc (#36)
• Use a custom, minimal SMTP client instead of lettre (#33)

0.2.0 - 2026-01-28

Features

• Configurable rate limiter max burst size (#28)

Performance

• Disable Nagle's algorithm and do own buffering on server connections

Refactor

• Remove Mutex around rate limiter

0.1.2 - 2026-01-22

Bug Fixes

• Set logs required by grafana to INFO (#21)
• Make inbound/outbound log messages consistent (#23)

Performance

• Use governor for rate limiting (#20)

0.1.1 - 2026-01-21

Bug Fixes

• Improve address extraction from SMTP commands (#14)
• Correct a typo in SMTP answer (#11)
• (config) Set default values for internal SMTP ports and max message size (#12)

Features

• Improve logging (#13)

Miscellaneous Tasks

• (dist) Configure cargo-dist (#10)
• Configure git-cliff

Refactor

• Get rid of indexing and slicing in check_armored_payload() (#15)
• Apply more lints (#17)

0.1.0 - 2026-01-19

Documentation

• (readme) Add README.md
• (license) Add LICENSE

Features

• Initial implementation

Miscellaneous Tasks

• Init repository
• (dependabot) Setup dependabot
• (ci) Setup CI
• (dependabot) Add github-actions to dependabot
• (cargo) Add metadata