Soda:

Watchguard removes the offending executable and replaces it with a text file attachment that says it removed file name xxxxxx.exe from the original email. The text and any non-executable attachments continue on to their intended recipient.

Why it adds an attachment baffles me . Since implementing the systems about two months ago it has been bloody murder trying to tell the users that "_NO_ attachment of any kind received from the outside world can do you harm - please click away to your heart's content!!!!!". I still get people forwarding messages with the Watchguard attachment that say, "I didn't know what it was so I'm forwarding it to you"..... <sigh>, even though the file always takes the form ATTxxxxx.txt. But it's still better than having to clean a Netsky infected box.

I send a 10000000$ proposal to TS, and a funny EXE file attatched.
Here's the beauty with the Watchguard, it strips only the file extensions it is told from the email. The rest of the email goes unmolested - So I still make my cool million I just don't have to play the silly game he sent me too.....