OT: Spam Problems

[Errol Mangwiro]

> Date: Mon, 9 Jul 2012 13:13:26 +0200
> From: htd at fritha.org
> To: users at lists.fedoraproject.org
> Subject: Re: OT: Spam Problems
> 
> On 09.07.2012, Errol Mangwiro  wrote: 
> 
> > Recently I started receiving bounces from mail purporting to having
> > been sent from addresses in my domain. But the addresses don't
> > exist. So I thought that someone was faking the sender header and
> > sending spam.
> 
> Please post the _full_ header of such a mail.
> 
> > I added SPF and domain-key records to try to combat this. 
> > However, either hotmail and yahoo don't check these or they 
> > ignore them because I'm still getting spammed. 
> 
> It's trivial to fake any From: header, and there's nothing you can do
> about that, unfortunately. 
>  
> > Does anyone know of a way I can tighten fake sender policies & prevent this from occuring again?
> 
> You can't prevent people from faking the From: header. Any spamfilter
> or network admin who tags email as spam according to From: is a moron.
> 
> The correct way is to see if all these spam-emails originate from the
> same server, and send the admin an epost. To do this, a look at the
> complete and original header of one of those spammails is neccessary.                                                                                                                                                                                                                                                               
Delivered-To: mickeybbb0f1 at cypherworld.net
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        Tue, 10 Jul 2012 08:29:33 -0700 (PDT)
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        Tue, 10 Jul 2012 08:29:32 -0700 (PDT)
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Received: from exprod7ob105.obsmtp.com (exprod7ob105.obsmtp.com. [64.18.2.162])
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        Tue, 10 Jul 2012 08:29:32 -0700 (PDT)
Received-SPF: pass (google.com: best guess record for domain of exprod7ob105.obsmtp.com designates 64.18.2.162 as permitted sender) client-ip=64.18.2.162;
Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of exprod7ob105.obsmtp.com designates 64.18.2.162 as permitted sender) smtp.mail=
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	Tue, 10 Jul 2012 08:29:32 PDT
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From: <postmaster at pearl.com>
To: <MickeyBBB0F1 at cypherworld.net>
Date: Tue, 10 Jul 2012 08:29:30 -0700
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