What is mean by SpamAssassin?

SpamAssassin is an automated email filtering system that attempts to identify spam messages based on the content of the email’s headers and body.

Steps to enable the SpamAssassin:

1. Login into the cPanel of your hosting account

2. Click on the SpamAssassin option available under the “Mail” section of your cpanel

3. You can enable the Spamassassin for your account by simply clicking on the button “Enable SpamAssassin”

Also you can Add the filter for Auto-delete Spam with the spamassissin and which  can automatically delete messages marked as spam. First set the number of hits required before mail is considered spam.