Evil Home Stereo

The guys at Heise point to an updated version of NiX-Spam, a bunch of procmail rules which they use at the iX offices.

Most of the pattern rules look like stuff we have implemented in SpamAssassin, too. What sounds interesting is the Fuzzy Checksum part. The tool generates a checksum for each mail it received and completely skips the checks if that mail hits the inboxes again. To aid against trojanned dial-up systems, there’s a Temporary Blackhole List with a TTL of about 48 hours.