Spam Filtering
SpamAssassin and SpamBox allow you to identify spam mail and flag it or prevent it from being delivered to your inbox.
SpamAssassin is an automated email filtering system that attempts to identify spam messages based on the content of the email's headers and body. It marks the header of emails it deems spam so you can easily identify them when you receive them.
SpamBox will deliver any emails identified as spam by SpamAssassin into a separate mail folder named "spam".