SpamAssassin is an email anti-spam tool which works for any emails on your account. It marks spams so it is easy to notice. You can also configure SpamAssassin to automatically delete emails marked as spam.
To enable SpamAssassin:
1) Log into your hosting control panel.
2) In the Mail section, click the SpamAssassin icon.
3) In the gray box, click Enable SpamAssassin.
On the next screen, you will receive a confirmation message stating that SpamAssassin was enabled.
Spam Score Limit
SpamAssassin screens each incoming email and assigns a score to the email based on its spam characteristics. By default, SpamAssassin considers messages with a score of 5 to be spam; however, you can adjust the spam score limit according to your preference. Simply select the desired spam score limit from the Score drop-down menu in the Filters section. The lower the score, the more stringent the filter will be.
0 means everything incoming will be marked as spam
5 is the default setting
10 means nothing incoming will be marked as spam
The auto-delete function automatically deletes messages which meet or exceed the spam score limit. Auto-delete can be enabled in the Filters section by clicking Auto-Delete Spam. USE THIS FEATURE WITH CAUTION. ENABLING AUTO DELETE COULD CAUSE YOU TO LOSE EMAILS THAT ARE NOT SPAM IF YOU DO NOT HAVE THIS FIGURED PROPERLY.