SpamAssassin, popular open source spam-filtering software, will have deadlier aim thanks to an add-on tool that is being offered free of charge to small businesses and individuals by MailChannels.
The tool -- called Traffic Control 3 -- is an e-mail traffic-shaping package that slows down the transmission of spam into corporate e-mail systems. (Compare Messaging Security products.) MailChannels officials say Traffic Control 3 will reduce spam volumes by 50% to 75% for SpamAssassin users.

Traffic Control 3 uses a tarpitting technique that greatly reduces the speed at which spam can be transmitted to its target, hitting spammers at their one great vulnerability - their pockets. Reduced speed means less money, and spammers just aren't willing to make the compromise. What have you heard about Traffic Control 3 - anyone else know any good open source spam tar pits?

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