[Dovecot] pop3 usernames

[Vlad Mazek]

Hello,

I would like to allow users to login as user at domain.tld instead of 
providing their login name; I'm coming from the sendmail/qpopper land 
and am trying to migrate to postfix/maildir/dovecot one step at a time 
and I've been able to find a way to do most of what I want except for 
the above requirement.

Do I have to use a SQL server or is there any way to easilly map an 
email address to a mailbox or even a maildir?

Thank you.

-Vlad