I would like the outbound mail from our server be domain.tld rather than host.tld. Also the "help" for the setting "What domain to use in outbound mail" in postfix configuration recommends this.
"You specify the domain that appears in mail that is posted on this machine. The default configuration of Postfix is to use the local machine name, hostname. Unless you are running a really small site, you probably want to change that into domainname, which defaults to the parent domain of the machine name."
But if I change this setting to "Use domainname" I get "status=bounced (User unknown in virtual alias table)" when sending mail to a local user. I guess there are some other settings that I have to change to get this to work, unfortunately I can't "play around" to test all setting as our server is "live" and are hosting many domains, therefor I need to get the settings right at once. I have not done many changes to the original postfix install done when installing Virtualmin Pro, and I don't think I have the right knowledge to "fix" this, hopefully some of you guys can point me in the direction on how and what I have to do to get this to work.