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New Spammers' strategies could defeat black lists
  Posted by: AceBHound on Feb 4th, 2005 7:56 AM
Spammers have always been fighting to stay ahead of anti-spam methods and have been thwarted by blacklists and Bayesian filters until recently. These spammers have now figured out ways to spam directly through their ISPs computers, rather than their personal machines. Since blacklists rely upon blocking specific IP addresses of known spammers, not entire ISP blocks, this could effectively cripple the usefulness of blacklists in the near future. In order to block the spam coming from the ISPs computers, all mail from the ISP would have to be blocked.

What alarms Linford and others about the latest spam offensive is that it strikes at the heart of the blacklist system, a baseline of defense for virtually all network operators. E-mail filters help to segregate good e-mail from bad, but blacklists that identify the Internet addresses of spamming machines keep large amounts of spam off networks and force spammers to find new launchpads.

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