[[!comment format=mdwn username="joey" subject="""comment 1""" date="2015-10-23T16:31:19Z" content=""" Well, for a hostname like "foo.example.com", it's right to use example.com for the mailname. OTOH, for hostname "example.com", it currently uses "com" for the mailname, which is certianly wrong. (It also uses "example" for the hostname, which I dunno if is right or not, probably a matter of opinion.) I've special cased it to require at least one dot in the domain, and parameterized domain extraction for cases where the default method doesn't work. """]]