ohkay, few questions i have installed postfix with spamassian and clamav, along with RBL spam blacklists, what else can i do in the way of increasing my spam detection? i notice that spam is still filtering through and they are getting a very low spam score of around 1ish and my filter is set to 3, how can i get my system more secure from spam? is there a way where it can teach itself over time whats spam and whats not? any suggestions anyone?
You need to train you system to recognize spam. http://spamassassin.apache.org/full/3.0.x/dist/doc/sa-learn.html