[CentOS] spam control

> Now, why would you want that ? I can think of no reason why one would
> want to use exim + vpopmail.

vpopmail has great user management tools? vpopmail is supported by other 
mail related software such as dovecot and spamassassin. vpopmail 
supports mysql tables which lends itself to integration with other 
software that are mysql capable.

Why would one NOT want to use (favourite mta) + vpopmail?