[TriLUG] anti-virus mail gateway

[Jason Tower]

i need to come up with a centralized anti-virus solution for a project i'm 
working on at my wife's non-profit agency.  i'm moving them from external POP 
mail to an internal mail server, probably running postfix.  currently they 
are using norton anti-virus on each desktop but the cost and effort of 
maintaining it has already become impractical.  in order to ditch the NAV, 
i'd like to set up an anti-virus mail gateway, either on the mail server 
itself or on a seperate box, that will scan incoming mail for nasties, 
quarantine anything objectionable, and pass the clean stuff to the real MTA.  
spam control/content filtering is not a concern at this point.  i've done 
this several times before using trend micro's interscan procuct, and it has 
always worked well.  but that is a proprietry, somewhat expensive product (it 
does run on linux though) and i'd like to use OSS if possible.  has anyone 
set this kind of thing up before?

jason