Published at LXer:
A couple of years ago, we set up a Linux box running Postfix, SpamAssassin and Amavisd to try and reduce the amount of spam we were getting on our mail server. We used the latest versions of each product. It has done pretty well but we have noticed in the past few weeks that more spam is getting through. Writing new rules doesn't seem to make much of a difference. What can we look at to start reducing the level of incoming spam?