AntiVirus 4 Linux

[Game Wizard]

Hi all!   I have a question for all of you. I need to setup a service that uses antivirus on linux to scan incoming mail (ie POP3). I already tried TrendMicro viruswall, and now d/l sophos. Are there any other good (and relatively cheap, NOT 10000$ mcaffee) products that will help me acomplish that goal ?   If you know anything please point me to the right direction.   P.S I am aware that my question is not exactly for this list, but I am desperate. :)   GW.