Something is sending mails to people typically with a doc.zip file attached and the problem is that they have put a fake address, on one of my domains, in "Return-path:" so I get a lot of "unable to deliver" messages.
example: Return-path: <[EMAIL PROTECTED]> Received: from [212.143.244.66] (helo=cybersite.dk) by mx03.stofanet.dk with esmtp (Exim 4.22) id 1AnXwt-0005jg-0L for [EMAIL PROTECTED]; Mon, 02 Feb 2004 07:52:47 +0100 [EMAIL PROTECTED] does not exist and that IP is not my mail server! can I do anything to stop this ?! brgds USK ps. hope this isn't too much off topic