This article is only intended for people who have or want to have a self-administrated mail server. Normal people can safely ignore this and read something else.

You have set a mail server on a Debian/Ubuntu box and you are proud of it. This is fine. You followed some tutorials and have a working SpamAssassin integration. Fine ! But there is still a problem : most spam emails are not considered as spam because they are beneath the 5.0 threshold. You thought about lowering the threshold but you had too many false-positive, especially from your hotmail/yahoo friends. So, we will polish a bit your SA installation and add some cool anti-spam stuffs.