Spam is a flooding internet with many copies of the same message sent to people that really don't want to recive the emails. Although most spam is comercial advertising. Ther are two mainn types of spams that each have different effects on internet users.Cancellable Usenet spam is a single message sent to 20 or more Usenet newsgroups. Usenet spam is aimed at "liukers" (people who read newsgroups but reall don't post or give their address away. Email spam targets individual users with direct mail messagees. Spams are often created by scanning Usenet postings, stealing internet mailing lists or searching the Web for addresses.
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