An easy virtual pop solution not involving qmail?

[Chris Smith]

Hi,

I'm currently writing a proposal to replace our crapped out Redhat 9 web
server with FreeBSD 5-STABLE when it appears.  In the process, I need to do
something with the mail server running on it.  It's currently sendmail with
virtual domains and one user account per mailbox etc.  Its performance is
piss poor and the users are complaining (there are 500 of the buggers and
they poll it all day and night).

Is there an easier to manage solution that DOESN'T involve qmail where I
don't need to give users REAL accounts?  I've seen several qmail-centric
documents floating around on the web but nothing concise and
straightforward. 

BTW - I'm not getting into a mail server religious war so don't even go
there ;-)

Many Thanks,

- Chris.