The sys admin’s daily grind: SpamAssassin 3.3
SpamAssassin is the backbone of countless anti-spam strategies. Its maintainers are cautious people and have just released the last major version since 2007. It’s definitely worthwhile.
About a year ago, I wrote about SpamAssassin’s own update function, SA-Update. It keeps the rules that SpamAssassin includes up to date and can integrate and update rules from third-party sources.