Re: SPF (var: Spam problem ifb. m. falsk 'Return-Path' (Sendmail MTA))

From: Robert Martin-Legène (none@robert+bsd-dk--martin-legene.dk.lh.bsd-dk.dk)
Date: Sun 19 Nov 2006 - 04:21:15 CET


Date: Sun, 19 Nov 2006 04:21:15 +0100
From: Robert Martin-Legène <none@robert+bsd-dk--martin-legene.dk.lh.bsd-dk.dk>
To: bsd-dk@bsd-dk.dk
Subject: Re: SPF  (var: Spam problem ifb. m. falsk 'Return-Path' (Sendmail MTA))

On Sat, Nov 18, 2006 at 09:13:50PM +0100, Gert Lynge wrote:
> Jeg sender kun via min primære MX, men er jo nødt til at bruge TDCs
> sekundære MX for at få post (strengt taget godkender ovenstående vel også
> den?).

Ja. Så alle TDCs kunder kan sende post for dig. Hvis du er paranoid nok,
så kan du omskrive din "mx" til "a:83.94.179.102".

> Men hvad med indgående... Jeg kører spamassassin og kan se den fail'er SPF
> konsekvent - og det skyldes vel at min post netop ryger via TDCs
> sekundære... Nogen der ved om man kan få Spamassassins SPF-check til at

Ja, det er præcist det som sker.

> ignorere det HOP så den i stedet checker det næst-sidste SMTP hop? Det ville
> jo nok ikke gøre min filtrering ringere hvis spf-checket også fungerede
> korrekt :-)...

Du kan jo evt slå SPF-check fra, hvis det ikke virker. :)

Jeg skrev nedenstående script. Det burde virke men er ikke testet i
praksis. Det omskriver den øverste "Received:"-linie i en mail til
"X-Received:". Det burde vist få SpamAssassin til at ignorere den. Du
skal nok bruge moomoodecode til at læse scriptet.

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eller hvis du er rigtig doven, så kan du snyde ved at se på
http://robert.martin-legene.dk/files/omskrivfoerstereceived.pl



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