I haven't come up with anything.  Anyone?

Scott K

On March 22, 2022 11:27:46 AM UTC, Barry Leiba <[email protected]> wrote:
>Yes, I thought about that too: just omit psd rather than explicit
>psd=u.  Is there a reason not to do that?  What's the value of
>explicit psd=u, as long as the spec says what absent psd means?
>
>b
>
>On Tue, Mar 22, 2022 at 5:20 AM Scott Kitterman <[email protected]> wrote:
>>
>>
>>
>> On March 22, 2022 2:47:37 AM UTC, John Levine <[email protected]> wrote:
>> >I took a look and I think we're pretty close.  I have two related
>> >suggestions.
>> >
>> >It is confusing that the default for psd is psd=n but an explicit
>> >psd=n isn't the same as no psd.  So I suggest allowing threee values
>> >for psd=y/n/u with "u" for unspecified being the default.
>> >
>> >In the three numbered steps in sec 4.8 it says first to look for any psd=n,
>> >then any for psd=y.  Consider this somewhat contrived case:
>> >
>> >x.a.b.c.d.e  v=DMARC1;
>> >b.c.d.e      v=DMARC1; psd=y
>> >c.d.e        (nothing)
>> >d.e          v=DMARC1; psd=n
>> >e            (nothing)
>> >
>> >The current text says the org domain would be d.e but I think we want
>> >it to be a.b.c.d.e.
>> >
>> >The fix is simple, combine the first two steps so you stop at the
>> >longest label with psd=y OR psd=n, and it's that label if psd=n or
>> >the one below if it's psd=y.  Arcane sort of special case, if the
>> >original domain has a psd=y/n, that's the org domain and no tree walk
>> >is needed.
>>
>> Thanks.  I agree that's the right answer.  I'll take another shot at it.
>>
>> I had considered just saying there's no default, but I guess using "u" works 
>> too if you think that's better.
>>
>> Scott K
>>
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