We're currently migrating our mail from a manually administered RHEL box to a CPanel box, which I'm so excited about I will probably weep a little when it finally happens.
As part of the migration, I would love for clients to see an immediate spam reduction as spam has been a bit of a bug bear on our current server. We already run rbls, which will continue on our new server, but as it's a fresh install without any pre-learned rules, I'm hoping there's resources out there to 'prime' spamassassin somehow with a list of common blocked IP's and blocked phrases for example, so it's ready to start blocking immediately.
Anyone know of any resources like this? Or does a fresh SpamAssassin install already have ample initial rules in place?