I've been blacklisted by www.backscatterer.org and have been trying to figure out exactly how this has happened.
The initial blacklisting happened on the 18th October, and I think I have found the culprit, but need some more information regarding backscatter as I'm a little confused as to a few things.
When an email is sent to an account that doesn't exist, the mail server at the moment sends this:
Delivery to the following recipient failed permanently:
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 5.1.1 <email@example.com>: Recipient address rejected: User unknown in virtual alias table (state 14).
----- Original message -----
Received: by 10.100.200.14 with SMTP id x14mr2202787anf.52.1257428197067; Thu,
05 Nov 2009 05:36:37 -0800 (PST)
Date: Thu, 5 Nov 2009 13:36:37 +0000
From: Paul <firstname.lastname@example.org>
Content-Type: multipart/alternative; boundary=0016368e1a8f044c8f04779fd1a9
Is this counted as Backscatter?