Re: [dmarc-ietf] Definition of "value" in RFC8601

Tue, 31 Mar 2020 17:06:39 -0700 


On April 1, 2020 12:00:00 AM UTC, John Levine <[email protected]> wrote:
>In article <[email protected]> you
>write:
>>>I don't see any reason to exclude them.  We could do this:
>>>
>>>      authserv-id     = sub-domain *("." sub-domain)
>>>
>>>Where sub-domain is imported from 5321 for ASCII mail and 6531 for
>EAI
>>>mail.
>>
>>That does allow IP address literals.  Do we want that?
>
>No, take a look at RFC 5321 and search for "address-literal".  You'll
>see
>they're always an alternative to a domain.  Sub-domain is trivial:
>
>   sub-domain     = Let-dig [Ldh-str]
>
>   Ldh-str        = *( ALPHA / DIGIT / "-" ) Let-dig

Odd.  In RFC 6376 it's:

      domain-name     = sub-domain 1*("." sub-domain)
                        ; from [RFC5321] Domain,
                        ; excluding address-literal

I wonder why it excludes address-literal if they are already excluded?

Scott K


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