Greetings,
in addition to SPAM-Assasin, why not fight some spam before it hits your serve rinboxes?
I recently implemented RBL lists on my RHE/RH9/cpanel machines
following those artciles:
http://www.webhostgear.com/175.html
http://forums.ev1servers.net/showthread.ph...89&page=2&pp=25
Like i said earlier The point is to reject majority of spam before they hit your or costumer inbox, I have about 98% acuracy in rejecting spam, with under 1% false positives. Saves you some server power too as spamassasin can be memory greedy when processing large quantities of emails.
Another related and VERY good tutorial form the makers of RVSKIN
http://www.rvskin.com/index.php?page=public/antispam
This one maybe somewhat tricky, but for $30 they will install it for you, its well worth it.