How do I stop someone using my domain for Spam emails?

Hi Blog Readers,

Every now and then I seem to have one of those low life Viagra sellers using my domain for spam emailing people.

I have done everything I can think of to try and prevent then from doing this, but they seem to keep doing it. 

I just wondered if anyone out there new of a way to stop them?

The headers from one of the bounce backs look like this:

Return-Path:<gavottes@vizioz.com>
Received:from rctp.telecomitalia.it (host49-133-dynamic.52-82-r.retail.telecomitalia.it
[82.52.133.49])
by mx.google.com with SMTP id o8si307731weq.161.2010.07.23.05.33.53;
Fri,23Jul201005:33:59-0700(PDT)
Received-SPF: fail (google.com: domain of gavottes@vizioz.com does not designate 82.52.133.49as
permitted sender) client-ip=82.52.133.49;
Authentication-Results: mx.google.com; spf=hardfail (google.com: domain of gavottes@vizioz.com does
not designate 82.52.133.49as permitted sender) smtp.mail=gavottes@vizioz.com
Message-ID:<3aaefd5365a446c33cfb0bb627waxworks@vizioz.com>
Date:Fri,23Jul201014:33:52+0200
From:GarnettMckinnie<gavottes@vizioz.com>
MIME-Version:1.0
To: NAME REMOVE <EMAIL@REMOVED.COM>
Subject:Where we are well established we are

As you can see from the headers, I have setup the SPF record and it is receiving a "hardfail"

We are using Google Apps for our email hosting, so you'd kinda hope that they have got things pretty much secured down, so what I am missing? Or is it always going to be possible for other people to fake sending emails using another domain?


Author

Chris Houston

Chris Houston

Chris is the founder of Vizioz and has been working in the field of website development for over 20 years. Chris has been working with Umbraco since 1998 and now spends his time running both Vizioz and QV Offices.


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