Returned mail virusses?

[Paul Howarth]

Andy Pieters wrote:
> Is anybody else seeing these returned mail errors with spam inside?
> 
> There is not a single unidentified process running on our servers or clients 
> so what else could be causing this?  Anybody heard of zombie Linux computers?
> 
> Anybody got any ideas?

It's probably backscatter - bounces for mail you didn't send because the 
spammer/virus forged your address as the sender.

Look at the headers of the mail you allegedly sent. Did it *really* come 
from one of your machines?

Paul.