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Spam filters
Spam filters help you get rid of spam easily. Antispam
appliances use layered filtering to stop spam and viruses
A spam filter is a piece of software which takes an
input of an email message. For its output, it might
pass the message through unchanged for delivery to the
user's mailbox, it might redirect the message for delivery
elsewhere, or it might even throw the message away.
Some mail filters are able to edit messages during processing.
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