antivirus scanning facility

[Mathieu Laurent <mathieu.laurent@qwentes.be>]

Hello,

My mail servers use exiscan with exim3 on woody. The antivirus scanner 
is uvscan from McAfee.

Since the beginning of this week, I see that there are virus not 
detected by uvscan (with virus signature file up-to-date). There are a 
new version of uvscan on McAfee Website. This release use 
"libstdc++.so.2.8" and  the lib in debian is "libstdc++.so.3.x". When I 
launch this new version, the program stops because the libstdc++.so.2.8 
doesn't exists.

My questions are: How I can install this library without break the 
libraries on my servers and which antivirus programs do you use to scan 
your mail. There are commercial solutions as McAfee uvscan, Sophos 
Sweep, ... Exist there antivirus free and opensource?

Mathieu