I am a System Admin for a small company. Some of my users are undeliverable emails from "System Administrator", which they didn't send. Here is the Actualmessage: From: System Administrator Sent: Wednesday, July 30, 2008 6:59 AMTo: Barbara BogleSubject: Undeliverable: Anjelina Jolie XXX Video Free. Your message did not reach some or all of the intended recipients. Subject: Anjelina Jolie XXX Video Free. Sent: 7/30/2008 6:59 AM The following recipient(s) cannot be reached: aparker@inlandrc.org on 7/30/2008 6:59 AM The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address. <ircmail2.irc.sb #5.1.1>Barbara Bogle is not a "System Administrator".Please help

Your users received the notification because the reply address on the spammail was spoofed. Happens all the time. The server for inlandrc.com should have generated a smtp-error instead. By sending notifications it acts as an open relay making spammers very happy.

Please refer to the following article for further information: Reverse NDR http://www.cryer.co.uk/glossary/r/reverse_ndr.htm Mike