E-mail filters are a way of filtering your e-mail to remove / or reroute unwanted mail based on a variety of criteria. You can block any sort of e-mail, not just mail of a commercial nature. Blocked mail can be deleted automatically or sent to another e-mail address or script. cPanel’s E-Mail Filters offer a lot of flexibility through an easy to use webinterface. You can even copy and paste a message into a demo box and you can simulate how the email filters would work. You can specify both, account level and user level filters.