virtual.domain anything (right-hand content does not matter)
firstname.lastname@example.org address2, address3
And with the configuration accepting local mails, it was creating some sort of problem with local addresses lookup. So, commented out the
mydestination = $myhostname, localhost.$mydomain, localhostline. It still accepts mails from localhost for local accounts. Then added the actual hostname to the virtual domains, with stuff like mails to apache etc being sent to me!