SEATTLE - A man once described as one of the world's top e-mail spammers pleaded guilty Friday to federal charges of mail fraud, wire fraud and failure to file a tax return.

Robert Alan Soloway, 29, was dubbed "the spam king" by prosecutors who said he used networks of compromised computers to send out millions upon millions of junk e-mails since 2003.

He was arrested last summer and charged in a 40-count indictment. He agreed to plead guilty to the three charges and the rest were dropped, including e-mail fraud, aggravated identity theft and numerous other counts of mail and wire fraud.

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