Cable-TV descramblers! FDA-approved diet pills! Viagra without a prescription! Instant access to XXX movies! Dramatically enhanced orgasms! If you have ever received e-mails advertising products and services like these — some quite within the law, some clearly outside it — chances are they came from a guy like Howard Carmack, professional spammer. Using three computers and working out of his mother's home in Buffalo, N.Y., Carmack sent an impressive 857,500,000 unsolicited e-mails in one year, something that is perfectly legal in New York State. But Carmack crossed the line, according to EarthLink, his Internet service provider, when he set up 343 accounts using stolen credit-card numbers to send these e-mails.

Spoofed or otherwise, the spam that makes it to your In box is just the tip of the iceberg. At the four major e-mail providers — MSN (including Hotmail), Yahoo, EarthLink and AOL (which, like this magazine, is owned by AOL Time Warner)--between 40% and 70% of all incoming mail is killed upon arrival at their mail servers. But this has spawned a kind of spam arms race: the more mail is blocked, the more spammers send, in hopes that some will get through. As a result, the performance of the mail servers is starting to suffer. Two months ago, 8% of MSN mail was spam. Today it's 50%. "The rate of spam," warns MSN business manager Kevin Doerr, "is threatening the viability of e-mail as a communications medium."