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CAN-SPAM Still Failing To Slow Junk Mail: Page 3 of 5

"Legislation can deter some spammers," said Lavaste, "but at the same time everyone should realize that spammers have been using deceptive practices for years." They're good at it, he added, and they'll continue to get better, at least for the foreseeable future.

"I don't expect spammers to give up this year," Lavaste said, noting that they're already reacting to CAN-SPAM by moving more of their mailings to remote servers overseas.

Likewise, the Mountain View, Calif.-based anti-spam supplier Commtouch noted Wednesday that it saw no change in the amount of spam between January and December.

"The month of January clearly shows that spammers didn't take seriously the CAN-SPAM legislation, and that the legislation didn't affect the number of spam outbreaks, number of spam messages, and the methods spammers use to get into user inboxes," said Avner Amram, executive vice president with the firm.

In fact, Commtouch has seen spammers turn to new techniques to get their messages through increasingly-sophisticated filters. One new method relies on letter substitution in headers, subject lines, and message bodies to blow by content-based anti-spam solutions.