Hi,

when I remember the RFC correctly, mailserver’s have to use their hostname (that is also their reverse DNS for that IP) in their HELO-message.
As my server ha a quite technical, long and hard-to-remember hostname, I don’t want to use that for the WebUI for the users (and - if possible - for the IMAP/SMTP-setting in their clients).
Unfortunately, it is AFAIR only possible to set a general MAILCOW_HOSTNAME in the mailcow.conf.
Is it possible, to configure mailcow in a way, that the “nice” URL is used for all user-facing stuff?

I tried it already, and is seems to work with a reverse proxy in front, but only SOGo seems to keep redirecting to the crude hostname. So is there any setting in SOGo where I can hardcode the Domain?

  • Simply add your desired domain to the ADDITIONAL_SAN variable in mailcow.conf - afterwards both, the hostname and the addition domain, can be used to access the ui.

Simply add your desired domain to the ADDITIONAL_SAN variable in mailcow.conf - afterwards both, the hostname and the addition domain, can be used to access the ui.

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    3 years later

    heavygale Grave digging here, but is there a way to change the domain that is in the Quarantine mails?

    I do not expose the UI externally as I want to use a separate domain for it, and well, the main domain points directly to the mailcow instance IP, while the secondary domain I want to use (and the one I want in the emails) points to a reverse proxy IP in front of mailcow.

    Would be ideal if I could set that second domain in ADDITIONAL_SAN, but I just need a way of changing what gets sent out in the quarantine emails.

      heavygale Any ideas where that hostname variable is being read from? Could I set it somewhere in the config, and then create a script that would update the quarantine.tpl after every update?

      heavygale Any ideas where that hostname variable is being read from? Could I set it somewhere in the config, and then create a script that would update the quarantine.tpl after every update?

      I’ll just do this after every update: sed -i "s|https://{{ hostname }}|https://mailcow.dmz.arpa|" data/assets/templates/quarantine.tpl

      I suppose all I need to do then is recreate the dovecot, php-fpm and nginx containers.

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