Every day, millions of people receive dozens of unsolicited commercial e-mails known popularly as spam. Some users see spam as a minor annoyance, while others are so overwhelmed with spam that they are forced to switch e-mail addresses. The thing that attracts the most spam is the e-mail addresses posted on Web sites or in newsgroups. Some spam is generated through attacks on mail servers, methods that don't rely on the collection of e-mail addresses at all.
One sneaky culprit is the spyware. …
