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Release 2025-12a is here:

GitHub

Release 🎄🐮 Moocember 2025 | Just another bugfix update - Revision A · mailcow/mailcow-dockerized

ImportantIf you already use docker compose v5, please run these commands once to fetch the update script which would break otherwise while trying t...

It contains some smaller fixes brought with 2025-12 (e.g. improved backup script handling regarding docker image pulls) and some more.

Update 2025-12 is here, just another bugfix update. Before you update, please make sure to read the important message in the release tab first.

GitHub

Release 🎄🐮 Moocember 2025 | Just another bugfix update · mailcow/mailcow-dockerized

ImportantIf you already use docker compose v5, please run these commands once to fetch the update script which would break otherwise while trying t...

⚠️ Heads-up for mailcow admins: OS upgrades may install Docker Compose 5.x, which mailcow can run with, but the update script won’t work unless refreshed once. Fix: Check your Compose version. If it shows 5.x, you’re affected. In your mailcow directory: git fetch Then: git checkout origin/master update.sh Without this tasks , you can’t update mailcow unless you downgrade Compose to v2 which is harder than running these steps :) If you still use compose v2 your good to go, simply run an update

Moohoo! Update 2025-10 has just been released:

mailcow: dockerized - Blog

🎃🐄 Mooctober 2025 Update | Rspamd 3.13.2 and Redis Security Update

2025-10a (Release: 24th October 2025) Moohoo again!

This update addresses the critical CVE-2025-49844 affecting Redis. While the exploit was not exposed in mailcow environments, updating is still strongly recommended.

Release 2025-09b is here. This update fixes startup issues with the NGINX container when IPv6 is disabled.

GitHub

Release 🍂🐄 Mootember Update 2025 - Revision B · mailcow/mailcow-dockerized

What's Changed scripts: ipv6_controller improvement + fix modules handling by @DerLinkman in #6722 [SOGo] Drop deprecated sogo_update_password sq...

Update 2025-09 is here:

GitHub

Release 🍂🐄 Mootember Update 2025 | MTA-STS Support, SOGo 5.12.3, Rspamd 3.12.1, and More · mailcow/mailcow-dockerized

Cautionmailcow now requires jq to be installed on the host system in order to operate with the redesigned IPv6 controller. If it's missing, please ...

Please read the changelog carefully before upgrading!

Starting with Update 2025-08: Configure MTA-STS directly in the mailcow UI. The required DNS records will be shown in the DNS checker tool too. #mailcow #teaser

Today we happy to confirm that mailcow is completely usable with Debian 13 🎉🎉 However, during upgrade you may stumble accross some pitfall: Exim. For this, we wrote a guide:

mailcow: dockerized - Blog

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-up...

You want to host mailcow on your own but do not know how? And you want to see the whole installation process prior before getting started? Then checkout the video from our community member Webnestify: Many thanks for the video! Highly recommended.

Though Debian 13 is mentioned to be released next week (August 9th (TBA)) we highly advise you to wait until upgrading your OS when running mailcow on it. Although we do not expect issues, please wait until official confirmation (following the week after the release).