E-Mail Virus Scanning Options on Unix/Linux

The Goal

I'd like something that will plug into our existing Exim/Procmail/SpamAssassin setup at WCNet (and elsewhere) to handle scanning for common viruses without a ton of overhead or expensive software licenses. The software should ideally work on Solaris, Linux, and FreeBSD.

The Players

From what I can tell so far, the following are things to look at:

My Testing

nothing yet
Last modified: Sun May 26 12:32:28 PDT 2002