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.
