I’ve set Mailcow up on my server with the following relevant records created for it:
In my setup, I have
When testing mail sending with mail-tester, the only significant issue it finds is that my reverse DNS does not match my sending domain. In this case, rDNS on my server’s IP address yields
nightfirec.at, but the mail is sent from
mail.nightfirec.at (despite having created the
nightfirec.at domain within Mailcow, and sending from an
@nightfirec.at address). How should this be addressed so they match?