Office Mail Addins
Office Mail Addins - Anti-virus
The Anti-virus Addin does pretty much what you'd expect, it removes viruses 
  from emails. It also sends a short message to the intended recipient stating 
  that a virus was removed and the sender and subject of the original . 
  
  The addin is currently compatible only with the ClamScan system (www.clamwin.com) 
  which needs to be installed on the Office Mail PC. It's free and doesn't need 
  to be running, just installed.
  
  Params:
  Clam: Use the Clam AV system
  Spam: Put the email (notification) message into the probable spam 
  NoMessage: Don't bother with notification, just delete the virus
  
  The following example shows a virus rule to check all incoming emails using 
  Clam and put the notification into the probable spam.
  