Setting up antivirus scanning for evolution

i would like to set up a email virus scanner. I use Spamssassin and BogoFilter (Spamssassin by default).

I have now installed Clam-AV (KlamAV) for the "normal" files on my system. and see that there is a tab in there for email scanning. when i pick Evolution as my email client it tells me to set up a filter and pipe if into Klammail. I can not find Klammail anywhere. I have even looked for it in the Documentation and all i could see is that i can not run this manually.

i have found links to say that if i am using Spamssassin that this will use CLamAV be default... im not sure if this is the case or not. Could some one please tell me if this is case or not ... of if there is another AV system i should be using to do email virus scanning.

Ubuntu 10.04.1
KlamAV 0.46
evolution 2.28.3