maddy 0.6.0

[foxcpp]

Breaking changes

• check: Remove require_matching_echo (deprecated in 0.5) (Get rid of require_matching_ehlo #280)
• modify/dkim: Remove require_sender_match from code (modify.dkim.require_sender_match doesn't do anything in practice #465)

New features

• maddyctl and maddy executables are merged

To start the server: maddy run ...
Other maddyctl subcommands are available
similiarly: maddy imap-acct, etc

• Support 1-N recipient address expansion (1:N address expansion #401)

For example, when using table.regexp:

replace_rcpt regexp "root@(.+)" "admin1@$1" "admin2@$1"

Or table.file:

[email protected]: [email protected], [email protected]

For SQL-based tables, just add multiple rows with the same key (address to be replaced).

• Add more placeholders for imap_filter (PR Add more fields to imap_filter #449)

{rcpt_to} (SMTP RCPT TO), {original_rcpt_to} (SMTP RCPT TO before any local rewrites), {subject}.

• storage/imapsql: Add support for using PostgreSQL broker for updates

It is used automatically, so now it is safe run multiple maddy server instancesusing the same PostgreSQL DB.

Bugfixes

• Migrate to go-imap v2 (Meta: Multiple IMAP connections using same mailbox are unsafe #188)

go-imap v2 is my fork of emersion/go-imap library that makes
massive changes to the server code.

In particular, it fixes long-standing issue of update handling
being non conforming to RFC 3501.

• check/spf: Fix "lookup limit reached" for some conforming records (maddy fails to validate SPF record with long lookup chain #487)
• cmd/maddyctl: Fix --argon2-time setting memory instead of time (PR Fix issue with maddyctl hash #502)
• check/spf: Ignore SPF permerr and temperr by default (SPF permanent errors #485)
• Move closing the default logger after printing configuration errors
• Fix TLS Internal Error caused by SNI-unuware clients when ACME is used (Maddy returns TLS Internal Error to valid handshakes on SMTP STARTTLS #467)

Documentation changes

• docs: Add Docker-specific documentation
• docs: Convert manual pages into per-module Markdown pages

Misc

• Go 1.17 is required now
• Dockerfile: Use TLS filenames same as certbot (Docker container's expected certificate names, tls_cert.pem and tls_key.pem #350)
• Dockerfile: Put Docker-specific config in the repo
• ci: Set OCI labels in built Docker image
• ci: Use docker buildx and qemu to build ARM64 images (Docker support for ARM based machines #404)

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This discussion was created from the release maddy 0.6.0.