To get a complete picture of how anti-spam should be setup in a Comms
deployment (in conjunction with convergence), read this:
http://wikis.sun.com/display/CommSuite/Integrating+Spam+and+Virus+Filtering+Programs+Into+Messaging+Server
http://wikis.sun.com/display/CommSuite/Integrating+Spam+and+Virus+Filtering+Programs+Into+Messaging+Server