Re: [Exim] Final Peer Review Sought: "Spam Filtering for MXs…

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Autor: Tor Slettnes
Datum:  
To: Tony Finch
CC: Exim User's Mailing List, Chris Edwards
Betreff: Re: [Exim] Final Peer Review Sought: "Spam Filtering for MXs" HOWTO
On Jul 13, 2004, at 03:01, Tony Finch wrote:

> On Mon, 12 Jul 2004, Tor Slettnes wrote:
>>
>> It is true that sender callouts are of limited use, since they only
>> verify the validity, not the authenticity of the sender address.
>
> If the sender signs their return path addresses then callouts verify
> both validity and authenticity. This is a powerful anti-forgery
> mechanism.


True. (And I do mention this in the doc. :-)

-tor