> Date: Mon, 9 Jul 2012 13:13:26 +0200
> From: htd@xxxxxxxxxx
> To: users@xxxxxxxxxxxxxxxxxxxxxxx
> 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@xxxxxxxxxxxxxxx
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