I hope someone can help me out.
I set up mailcow-dockerized - latest version. It sits behind an nginx reverse proxy which I set up as per mailcow instructions.
When I access my site mail.domain.com from an external IP address, I get the above error “Access Denied You are not authorized to access this page”. I see a 403 error in the nginx-mailcow log (accessed via docker compose logs").
When I access the same site from my home/server network, it succeeds.
Why is this happening, and how can I fix it? It would be nice to be able to login to mailcow to review emails (e.g. via SOGO) from outside the home. Indeed if I try mail.domain.com/SOGo, it briefly shows the page then redirects to mail.domain.com/ and the same error.
Thank you in advance if you can suggest how to correct this.