Mailcow dockerized in a Debian VM and Reverse Proxy configuration

halvar100

I have a problem that I believe everybody should have. But I cannot find a solution for it.
I installed mailcow on a Debian VM on my unraid server. The VM has his own IP - Adress. And I have a static WAN Ip Adress for my house.
In my router I forward the port 80 and 443 to the IP Adress of my VM Port 80 and 443. In cloudflare I made the configuration like proposed in the documentation.
And it works just great. I have no problem with mailcow whatsoever. I am really happy with it.
But there is a problem with my unraid server which has a different IP Adress and the Proxmanager. Of course, locally I can open all the Web Guis of my Dockercontainers. But if I try to use the cnames like sonarr.domain.com I always end up on the mailcow GUI. Therefore I cannot use this anymore. I am a kind of lost and cannot find a solution so far on the internet.

esackbauer

What you need is a reverse proxy like Nginx Proxy Manager.
Educate yourself what SNI is, what SAN are in a SSL certificate, and how a reverse proxy uses this.
All this is not specific to mailcow so google for it. It is common knowledge for operating web servers, and we won’t help you with the basics.

After that you can use mailcow to use the reverse proxy for mailcows http and https ports.
The certificate thing is tricky, I would recommend to get them on the reverse proxy and copy them to mailcow afterwards.

There is a steep learning curve in front of you, running and configuring a mail server is a complex thing with many protocols to understand.