I get these bounces sometimes that creates a mail loop with the error “Mail loops back to myself”. I looked up the error and got this page https://docs.mailcow.email/troubleshooting/debug-common_problems/ with the suggestion “Please check in your mailcow UI if you made the domain a backup MX:”. I did not - as in, I did not tick those two boxes. I am not sure what that would accomplish - relay domain and relay all recipiants. What does this mean? I don’t see any information about what that does, and I don’t want to end up with an open mail relay….