postfix-users October 2010 archive
Main Archive Page > Month Archives  > postfix-users archives
postfix-users: Re: Fighting Backscatter

Re: Fighting Backscatter

From: Wietse Venema <wietse_at_nospam>
Date: Fri Oct 15 2010 - 20:05:06 GMT
To: Postfix users <>

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 and sends it to
> 2) My server ( accepts the message because myaunt@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
> 3) rejects the mail because it's SPAM and sends it back to the
> spoofed "sender":, basically saying "your message to
> was rejected because of xyz reason"

Cox rejects the message; YOUR box sends it back to an innocent person.