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From: Rich Matheisen [MVP] on 15 Mar 2010 09:50
On Mon, 15 Mar 2010 10:35:01 +0100, "Tim Roelands" <no(a)mail.com>
wrote:

>I receive repeatly this kind of messages;
>
>We use our own Exchange server to sent en receive email. What can be done to
>prevent receiving this fals messages?

[ snip ]

>Received: from host2.india-to.net (host2.india-to.net [67.225.163.209])
> by mx.google.com with SMTP id 3si157254pxi.28.2010.03.03.17.33.34;
> Wed, 03 Mar 2010 17:33:35 -0800 (PST)
>Received-SPF: neutral (google.com: 67.225.163.209 is neither permitted nor
>denied by best guess record for domain of nelleke.smits(a)iv-support.nl)
>client-ip=67.225.163.209;
>Authentication-Results: mx.google.com; spf=neutral (google.com:
>67.225.163.209 is neither permitted nor denied by best guess record for
>domain of nelleke.smits(a)iv-support.nl) smtp.mail=nelleke.smits(a)iv-support.nl

^
|
Is this your domain? ----------+

You can start by publishing a SPF record for your domain in your DNS.

http://www.openspf.org
http://www.microsoft.com/SenderID

Once other servers begin to no longer accept e-mail using a spoofed
address the number of these incidents should decline (they'll never
stop).
---
Rich Matheisen
MCSE+I, Exchange MVP
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