We will update Mailcow from legacy to the newest master version, which contains the following breaking changes:
- Login
With the update, the login screens for users, domain administrators, and administrators are now separate:
Users log in as usual at the following URL:
https://mail.example.com/
Domain administrators now use
https://mail.example.com/domainadmin
Administrators use
https://mail.example.com/admin
The SOGo web interface is now only accessible via the user login at https://mail.example.com/; after a standard direct redirect to SOGo, the Mailcow settings are still accessible via the link (wrench icon, top right). The Login URL for Roundcube User does not change.
- Two-factor authentication (2FA)
Users/mail accounts that have 2FA enabled must now use app passwords to log in via mail protocols such as SMTP/IMAP, etc., for example when using a local email client or the Roundcube web interface. Each user can create these after logging into their Mailcow account under "App Passwords".
Take a close look at the changes, update your documentation accordingly, and feel free to contact us at any time if you have any questions or concerns.
Start maintenance window: 29/09/2025 23:00
Stop maintenance window: 30/09/2025 02:00
