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Re: [dmarc-ietf] "psd=" tag early assignment

John R Levine <johnl@taugh.com> Sun, 10 July 2022 16:53 UTC

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Date: Sun, 10 Jul 2022 12:53:21 -0400
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From: John R Levine <johnl@taugh.com>
To: Scott Kitterman <sklist@kitterman.com>, dmarc@ietf.org
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Subject: Re: [dmarc-ietf] "psd=" tag early assignment
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>> I changed it in a pull request a few weeks ago.
>>
>> If you don't stop on the first psd=y that is not the original domain,
>> you get the wrong result if there are DMARC records above the psd=y.
>>
>> I sent this example on June 21, link is
>> https://mailarchive.ietf.org/arch/msg/dmarc/T-8NX63L8ilHPhHXMygKdTJ6zMM/
>>
>> a NXDOMAIN (or psd=y, doesn't matter)
>> b.a blah
>> c.b.a psd=y
>> d.c.b.a blah
>> e.d.c.b.a NXDOMAIN
>>
>> I think the org domain for e.d.c.b.a is d.c.b.a.
>>
>> If you don't stop at the psd=y, you get b.a as the org domain which still looks wrong to me.
>>
>> The description in the current draft gets d.c.b.a.
>
> Thanks.  I remember now.  I viewed this as bug fixing the documentation, not any kind of substantive design changes.

Right, we all agreed what result we wanted, but without the stop this case 
got the wrong answer.

Regards,
John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly

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