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Re: [dmarc-ietf] Signaling MLMs

Hector Santos <hsantos@isdg.net> Tue, 18 April 2023 18:47 UTC

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From: Hector Santos <hsantos@isdg.net>
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Date: Tue, 18 Apr 2023 14:47:13 -0400
In-Reply-To: <10c5dcb4-4eca-b6f4-6a76-29faf2700f76@tana.it>
Cc: dmarc@ietf.org
To: Alessandro Vesely <vesely@tana.it>
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Subject: Re: [dmarc-ietf] Signaling MLMs
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> On Apr 18, 2023, at 12:24 PM, Alessandro Vesely <vesely@tana.it> wrote:
> 
> What's the point of wearing an atps record if it's not called out in a DKIM signature?  (I wouldn't have tested it anyway).


Alessandro, you are already doing the DNS call for DMARC.  Hitch a ride!! You can check for atps=y or asl= for 3rd party authorization. 

> What's the point of ARC-sealing a message which is not arrived from an external ADMD?

I have no idea and I think ARC is a waste of time. Way too much overhead.  Not a good idea to pursue this has a long term solution.  I rather not.

> I'm rather happy with the amount of gibberish I currently get.  For this Benny's message it was:
> 
> Authentication-Results: wmail.tana.it;
>  spf=pass smtp.mailfrom=ietf.org;
>  dkim=pass reason="transformed" header.d=junc.eu;
>  dkim=pass (whitelisted) header.d=ietf.org
>    header.b=yiVUz1hG (ietf1);
>  dkim=pass (whitelisted) header.d=ietf.org
>    header.b=yiVUz1hG (ietf1);
>  arc=fail (1 set(s)) smtp.remote-ip=50.223.129.194
> 

So your verifier see Benny’s as suspicious because of arc=fail? 

Benny is telling the world “ietf.org <http://ietf.org/> is authorize to resign on my behalf” via DNS.  No headers required.  No delayed learning necessary.

What more is needed?

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