Recommendations POP3 server

[Rico <coolzone_(_at_)_it_(_dot_)_dk>]

Hi.

We have recently moved serveral domains from a web hotel onto one of our 
own obsd servers. In that connection I need to setup a pop3 server which 
can handle different domains and different users in connection with each 
domain.

If someone would provide recommendations from experience with a setup 
like this on obsd I would appreciate it.

Thanks.

Rico.