2026-01 (Release: 29th January 2026)
Moohoo everyone!
🐄🛡️ January 2026 Update | Limited EAS/DAV Access and Restricted Alias Sending
🎄🐮 Moocember 2025 | Just Another Bugfix Update - Revision A
Warning
If you are using Docker Compose v5, please make sure that you first apply these small fixes in order to prevent the update.sh script from failing:
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Without this, the update script will tell you, that your docker compose version is unsupported, even if you are using v5.
This is due to a small typo in the version check that has been fixed but may need to be applied manually if you are on Docker Compose v5 already.
🎃🐄 Mooctober 2025 Update | Rspamd 3.13.2 and Redis Security Update
🍂🐄 Mootember Update 2025 | MTA-STS Support, SOGo 5.12.3, Rspamd 3.12.1, and More - Revision A
2025-09c (Revision C Release from 7th October 2025)
Changes
- [SOGo][Web] SOGo URL Encryption support ➡️ PR #6758
- [Nginx] do not invert ENABLE_IPV6 ➡️ PR #6762
- [Web] Remove Port from HTTP_HOST ➡️ PR #6760
- [Web] Allow wildcard subdomains for MTA-STS ➡️ PR #6759
- [Web] set cookie SameSite attribute to Lax ➡️ PR #6766
- [Web] Rename PHP Cookie to MCSESSID ➡️ PR #6767
- Update GitHub’s issue template ➡️ PR #6772
- Clearer message to install required tool, e.g. jq ➡️ PR #6764
- Make domain description field readonly when no ACL ➡️ PR #6789
- Show “Never” by default if no last-modified date saved ➡️ PR #6788
- Hide relayhosts when ACL does not allow ➡️ PR #6787
- Fix several SQL statements ➡️ PR #6786
- Fixed wrong footer escaping for certain characters ➡️ PR #6782
- Rename password fields for AppPasswords same way for consistency ➡️ PR #6781
- Fixed password complexity check for AppPasswords creation/edit ➡️ PR #6780
- Remove debug console.log calls ➡️ PR #6779
- Enable HTTPS redirect by default on new setups ➡️ PR #6777
- [Helpers] Fix cold-standby digits in compose project names and inclusion of docker-compose.override.yml ➡️ PR #6800
- Fix enabling of ipv6 when updating ➡️ PR #6791
- Update variable name for prometheus-exporter security token ➡️ PR #6776
- Fixed typo in lang de-de ➡️ PR #6765
- Fix typos in config by ➡️ PR #6792
- chore(deps): update actions/stale action to v10.1.0 ➡️ PR #6806
- [Postfix] update postscreen_access.cidr ➡️ PR #6801
- Translations update from Weblate ➡️ PR #6771
- Translations update from Weblate ➡️ PR #6794
- Translations update from Weblate ➡️ PR #6785
- Translations update from Weblate ➡️ PR #6790
- Translations update from Weblate ➡️ PR #6793
- Translations update from Weblate ➡️ PR #6743
- Translations update from Weblate ➡️ PR #6749
Full Changelog
https://github.com/mailcow/mailcow-dockerized/compare/2025-09b...2025-09c
Quick Guide: Upgrading Debian 12 to Debian 13 for Mailcow Servers
Moohoo, dear community!
With the release of Debian 13 (Trixie), the question arises for you as administrators: How can you perform a smooth dist-upgrade from Debian 12 (Bookworm) – especially on systems running mailcow?
A commonly overlooked pitfall: Exim.
🔥🐄 Mooly Update 2025 | Security Update
💐🐄 Mooay 2025 Update | Identity Provider Improvements and Bug Fixes
💮🐮 Moorch 2025 Update | the Update Which Changed the Cow
2025-03b (Release: 7th April 2025)
Changelog
- [SOGo] Update to 5.12.0
- [Postfix] update postscreen_access.cidr by @milkmaker in https://github.com/mailcow/mailcow-dockerized/pull/6443
- Fix sasl_logs by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/6450
- [Web] Fix transport routing test by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/6451
- [Netfilter] Downgrade to 1.61 by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/6438
- Fix tiny typo by @sardaukar in https://github.com/mailcow/mailcow-dockerized/pull/6426
- [SOGo] Use JS for mailcow logout by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/6439
- [Dovecot] Increase Timeout for HTTP Login Request by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/6422
- [Web] Improve clarity of LDAP SSL/TLS settings by @FreddleSpl0it in https://github.com/mailcow/mailcow-dockerized/pull/6460
Full Changelog
https://github.com/mailcow/mailcow-dockerized/compare/2025-03a...2025-03b
🐥🐄 Febmooary 2025 Update | Rspamd and MariaDB Update
Moohoo everyone
It’s time for another update.
This time, we’ve updated Rspamd to 3.11-2, upgraded MariaDB to 10.11, and moved our Docker images from Docker Hub to GitHub.
Nothing too wild.
Important Fix: Dovecot & Netfilter
Previously, Dovecot allowed multiple failed login attempts within a single session without being properly detected by Netfilter. This has now been fixed.