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Definition: spam folder

The location for storing unwanted email as determined by a spam filter. Also called a "junk folder" or "junk mailbox," spam folders are created by mail servers as well as by the user's email program. In some mail programs, the messages in the spam folder can be sorted and viewed by the spam filter's rating, which is a percentage of confidence that the message is junk. Messages with lower ratings, such as below 50%, can be reviewed more carefully to be sure they are not legitimate. See spam filter.