Anti virus suggestion?

[Kenneth Burgener]

I have a Postfix mail server that needs to have an anti-virus solution. 
      All of the clients machines are running Windows so they are 
susceptible to all of the email viruses going around.

What would you suggest that would incorporate best with my current setup:
	- Debian Sarge 3.1 Stable
	- Linux 2.4.27 kernel
	- postfix
	- courier-pop
	- spamassassin

Thanks in advance,
Kenneth