mailcow
Dockerized groupware and mail server suite with webmail
Alternative to: google workspace, gmail, microsoft 365, zoho mail, fastmail
About
Versions (93)
2026-07a
2026-07-30What’s Changed
Important
This update addresses several security-related issues in mailcow. We strongly recommend updating your mailcow instance as soon as possible.
Updates and Security
- [Rspamd] update to 4.1.4 by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/7386
- Fix nginx CVE-2026-42533 by @SYNLINQ in https://github.com/mailcow/mailcow-dockerized/pull/7358
- Update actions/stale action to v11 by @renovate[bot] in https://github.com/mailcow/mailcow-dockerized/pull/7375
- Hardening mailcow by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/7387
Fixes
- fix: restore subject display in quarantine overview by @oidipos in https://github.com/mailcow/mailcow-dockerized/pull/7367
- [Nginx] only bind IPv6 default_server when ENABLE_IPV6 is set by @smpaz7467 in https://github.com/mailcow/mailcow-dockerized/pull/7343
- [Web] fix add/time_limited_alias silently discarding requests and validity by @smpaz7467 in https://github.com/mailcow/mailcow-dockerized/pull/7345
- [Web] return sender_acl in get/mailbox API by @smpaz7467 in https://github.com/mailcow/mailcow-dockerized/pull/7348
- fix: cors allowed origins settings validation by @fallmo in https://github.com/mailcow/mailcow-dockerized/pull/7333
- [Web] harden CORS origin matching and add Vary: Origin by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/7385
- [Web] Move mailcow update check to server side by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/7388
- [Web] Create default mailbox template with eas and dav access by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/7389
- [ACME] Skip mta-sts certificate request when MTA-STS is not active for a domain by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/7390
New Contributors
- @oidipos made their first contribution in https://github.com/mailcow/mailcow-dockerized/pull/7367
- @smpaz7467 made their first contribution in https://github.com/mailcow/mailcow-dockerized/pull/7343
- @fallmo made their first contribution in https://github.com/mailcow/mailcow-dockerized/pull/7333
Full Changelog: https://github.com/mailcow/mailcow-dockerized/compare/2026-07…2026-07a