SpamAssassin is a mail filter installed on a server to identify spam. It checks for spam using many pre-set rules that check the header, body, and sender of all email messages sent to your domain mailbox. SpamAssassin generates a score for each email. Score above the spam threshold and the mail is marked as spam.
There are a number of different actions related to reducing spam with SpamAssassin. First step is our tip of the day: how to turn on SpamAssassin.
To enable SpamAssassin:

  1. Log into your cPanel account
  2. Click the Mail icon
  3. Click the Spam Assassin link (towards the bottom)
  4. Click Enable Spam Assassin button