Checked docs and forum, nothing specific to this (at least not with my search terms).
Is there a proper set of steps if one needs to change the primary hostname? I created, for example: “MyTestServer.com”, bought the domain name, etc. My intent was to use this as a test for new cloud instances, with it’s own DNS, etc. while I migrated each of my other domains over.
This worked great. Now it’s time to drop MyTestServer.com. I don’t want to be stuck renewing it each year.
Is there a correct process for dropping the primary domain name from the mailcow config and promoting one of the other domains? (I assume at least one domain name has to be the king.)