For Linux shared Hosting customers, AccuWebHosting offers Exim Mail server. Linux shared Hosting customers can enable spam protection from cPanel through either BoxTrapper or SpamAssasin spam filter. The following tutorial will show you how you can configure spam protection through both BoxTrapper and SpamAssasin. Since we do no provide BoxTrapper spam filtering in Linux shared hosting, you will have to jump to 1:28 in this video tutorial.
If you are still receiving too much spam emails, you should consider our paid Anti-Spam Cloud Service.