So, Cox rejects the message to me, and then I'm sending it back to an innocent person?
SJ -----Original Message----- From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Wietse Venema Sent: Friday, October 15, 2010 2:05 PM To: Postfix users Subject: Re: Fighting Backscatter Steve Jenkins: > Hi, Wietse. Thanks for the speedy reply. I'm a big fan of Postfix, so first > of all, thank you for developing such a great product. I cringe thinking > about the days when I used to have to run Sendmail (shudder). > > Ok... so let me see if I understand what is happening on my server. > > 1) SpamCo forges a message from innoc...@victim.com and sends it to > mya...@familyname.com > > 2) My server (familyname.com) accepts the message because mya...@familyname > is a valid recipient that appears in my virtual aliases file, then forwards > the message (based on the info in that virtual aliases file) to my aunt's > actual email address of auntiemildredloveskitt...@cox.net > > 3) Cox.net rejects the mail because it's SPAM and sends it back to the > spoofed "sender": innoc...@victim.com, basically saying "your message to > mya...@familyname.com was rejected because of xyz reason" Cox rejects the message; YOUR box sends it back to an innocent person. Wietse
