- Fixed a problem with the milter, where perl wasn't freeing up memory causing it to get bigger and bigger.
- Upgraded to SpamAssassin 3.1.1
- Tweaked some of the spam assassin configs to give it a lower timeout, and allow more spamd processes to fork
- Configured the the bogusmx blacklist
More about the bogusmx blacklist
Since spammers don't seem to want to see email bounces coming back to them, they configure their domain names to have "invalid" MX records -- those pointing to private IP space, things like 127.0.0.1, or hosts that have no associated A records.