So I can't access the mailboxes with pop3 :-( (How can I separate info@firstdomain info@seconddomain ...?)
Please don't top-post on this mailing list.
Create two accounts, info1 and info2
Create /etc/mail/virtusertable with
info@firstdomain info1 info@seconddomain info2
POP users log in with username "info1" and "info2" respectively.
Everything works.
Paul.