Here's a look at different technologies companies such as Wyndham International have used to solve their spam problems.

Savvis Communications, one of the world's largest ISPs, said it is terminating service to about 40 of its customers who have been using its networks for spamming purposes.

Two scourges -- viruses and spam -- are the most vexing e-mail issues for CIOs, according to a survey conducted by Ferris Research Inc. and Computerworld. Regulatory compliance isn't far behind.

An industry organization representing heavyweight e-mail providers Yahoo Inc., Microsoft Corp., America Online Inc. and EarthLink Inc. released recommendations yesterday for ending spam e-mail.

The lawsuits are among the first filed under a new U.S. law called CAN-SPAM, which went into effect in January.

Microsoft is accusing the defendants of violating a new antispam law by spoofing their domains, routing e-mail through open proxies, deceiving customers with misleading subject lines and failing to include unsubscribe options in their e-mails.

Classifying e-mail as "good" or "junk" before it's sent to be scanned by spam filters could speed up the delivery of legitimate e-mail, according to a paper presented today at the 2004 Usenix Annual Technical Conference.

America Online and Yahoo plan to begin using technology to verify the source of e-mail messages in coming months as both companies work to stop spam e-mail.

While IP addresses in the U.S. made up just 28% of the spam-sending addresses in a survey by CipherTrust Inc., those addresses sent out much more unsolicited commercial e-mail than spammers from other nations.

The technology hasn't been widely adopted, but spammers are taking it up at a faster rate than legitimate e-mailers.