Other anti-spam vendors paint an even more distressing picture of CAN-SPAM's first month.
Brightmail, for instance, released its January numbers earlier this week, and said that the amount of spam it stopped actually increased over the previous month. In January, Brightmail tagged 60 percent of the messages it processed as spam, a two percent climb over December.
Brightmail's numbers derive from its 300 million end-users in both enterprises and those served by Internet service providers, the company said, as well as its Probe Network, a collection of more than two million decoy accounts used to attract spammers.
"We certainly haven't seen a decrease [in spam] since December," said Francois Lavaste, Brightmail's vice president of marketing. "But that's not a big surprise."
Expectations of CAN-SPAM's impact shouldn't be set too high, he said, since legislation is just one component of an anti-spam strategy that should include end user education, revised best practices by large commercial mailers, and technology such as anti-spam filters at the gateway.