Spam messages are unsolicited bulk messages that you receive in your mail box.
If your mail administrator configures the mail server with a spam filter, messages that the filter identifies as spam are moved to a designated spam folder. The spam filter bases its decisions by comparing with known spam messages. To help the spam filter improve the comparison process, mark spam messages that the filter misses as spam and mark incorrectly identified spam messages as not spam. If spam is configured, a Spam folder is created and made available as a system folder.