RayMitchell:
To complicate my question just a little bit more, the server I'm running SpamAssassin on is NOT the server where the users have their accounts, - it's just a "mail gateway", so forwarding all the spam into the internal "user-server" wouldn't be a very bright idea.
I use this configuration just as an extra protection for the real server. The "mail gateway" has no sensitive information stored and no user accounts to break...
What I would like to achive is a way to use SpamAssassin on this "mail gateway" so that at least a certain number of the incoming spam would be stopped/deleted there.
In order to control the sensitivity of the SpamAssassin settings, I would prefer to get some lind of log on that machine as well.