SpamShield: a perl-based spam filter for sendmail

Monday, 16 September 2002, 6:48 PM EST

As system administrators work to build sophisticated roadblocks, spammers continue to find ways to knock them down. This article will focus on one viable solution, SpamShield version 1.40.

The science of spam (if you can call it that) has taught us one thing: spam leaves a definite "calling card" in the system logs. This calling card is generally repetitive enough that the process of tracking spam may be automated. Based on this theory, a brilliant programmer by the name of Kai Schlichting wrote a Perl-based program called SpamShield.

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