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In message <20250411205917.169acc3d1...@ary.qy>, John Levine
<jo...@taugh.com> writes

>It appears that Richard Clayton  <rich...@highwayman.com> said:
>>>>       +------------+-------------------------------------------------+
>>>>       | ds=        | Signing key identifier (domain & selector)      |
>>>
>>>So this appears to conflate selector with domain name being signed?  Why?
>>>
>>>How is the domain name being signed identified separately?
>>
>>Let's turn that round ... why did DKIM1 put the selector and the
>>associated domain into separate fields ?
>>
>>If there is a compelling reason for keeping then apart we should take
>>note it -- 
>
>If you combine them into one field how do you tell what's the selector and 
>what's
>the domain?  My DKIM setup uses selectors like 670e67f41a6d.k2504 so you can't 
>just
>pick off the label before the first dot.

You could use a separator character which was not permitted to occur in
domain names ... I expect @ might confuse people :-) as would, from the
positioning, underline, but colon might be suitable...

- -- 
richard                                                   Richard Clayton

Those who would give up essential Liberty, to purchase a little temporary 
Safety, deserve neither Liberty nor Safety. Benjamin Franklin 11 Nov 1755

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