OT: Spam Problems

[Alan Cox]

On Mon, 9 Jul 2012 11:03:38 +0000
"Errol Mangwiro " <emangwiro at live.com> wrote:

> Hi,
> 
> 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. 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. 

I don't think anyone bothers with SPF any more - the only people with
valid records are usually spammers.
> 
> Does anyone know of a way I can tighten fake sender policies & prevent this from occuring again?

You can't.

Alan