[exim] Exim with Amavis with SpamAssassin and ClamAv

Hi Guys

Was wondering if there is any benefit for running amavis-new and Exim4?

Exim4 already has filtering built in as of version 4 for ClamAv and
SpamAssassin.

I recently read a Spam filtering howto in Linux Magazine.

Any advice and comments on experience would be appreciated.

Thanks
c