Re: [dmarc-ietf] WGLC review of draft-ietf-dmarc-dmarcbis-30

On Sun, Mar 31, 2024 at 1:40 PM Scott Kitterman <sklist@kitterman.com>
wrote:

>
>
> On March 31, 2024 5:32:13 PM UTC, "John R. Levine" <johnl@iecc.com> wrote:
> >>>> I’m probably being pedantic here: is “gov” a domain?
> >>> Yup, it's a domain.
> >> I stand corrected on that.
> >
> >Anything that meets the DNS spec is a domain namen, e.g.,
> argle.bargle.parp is a domain name.  If and how particular names might be
> resolved is a topic to which the IETF and ICANN have given a certain amount
> of attention.
> >
> >> Might be worth bumping up. Examples:
> >>
> >> execute-api.cn-north-1.amazonaws.com.cn
> >> cn-northwest-1.eb.amazonaws.com.cn
> >>
> >> (Amazon seems to have most of the really long ones)
> >
> >None of those Amazon ones are used for mail so they're irrelevant to
> DMARC, but see Seth's recent message.  He says he's seen mail domains 8
> deep.
>
> I need to write a response to that, but he's made the claim before and
> they are from deep within a PSD.  The idea that we need to change the
> number as a result got no traction.
>

That's not true. There was not consensus on a new N, but there was also not
resistance to increasing it. Multiple operators have confidential examples,
and I also have some.

Remember, the issue is with *reporting* discovery and not org domain
lookup. Those that collect reports see the issue, but cannot break client
confidentiality to share the examples.

>
> Scott K
>
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-- 

Seth Blank | Chief Technology Officer
Email: seth@valimail.com

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