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> 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.
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