1. Login to cPanel.
  2. Locate and click on the "Account Level Filtering" icon within the "Mail" category.
  3. Click on the "Create a new filter" button.
  4. Create the rules for the new spam filter. In the example below, we are blocking all emails with "Free Money" in the subject line:
  5. Click the "Activate" button to apply the spam filter to all accounts on the domain.