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E-mail is a wonderful tool to inexpensively keep in touch with family, get information from businesses, send requests for information, and more. However, like any tool, it is often misused.

Junk e-mail is exactly like junk mail you might receive in your regular mailbox. Some of it is useful information, but, as with your physical junk mail, most of it is not worth your time. Junk e-mail is usually harmless--but it is a waste of time and computer resources. It doesn't just make it difficult to pick out the messages from friends, relatives, business contacts, and other people you do want to hear from. It also overloads mail servers (the computers that handle e-mail) and other parts of the network infrastructure. "Spam" is the term used for mass recipient junk e-mail.

If you have ever posted a message on Usenet, put your e-mail address on a Web page, or even subscribed to an e-mail discussion list that was not configured to conceal its subscribers' addresses, chances are good that you have received unsolicited bulk e-mail. Such junk e-mail is used by businesses that don't care about their reputations, so it advertises mainly questionable medical products, get-rich-quick schemes, pornography, and the like, as well as spamming software and address lists.

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