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Re: [dmarc-ietf] Lookup Limitations For Public Suffix Domains

Tim Wicinski <tjw.ietf@gmail.com> Sat, 01 December 2018 01:06 UTC

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From: Tim Wicinski <tjw.ietf@gmail.com>
Date: Fri, 30 Nov 2018 20:06:17 -0500
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To: Scott Kitterman <sklist@kitterman.com>
Cc: dmarc@ietf.org
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Subject: Re: [dmarc-ietf] Lookup Limitations For Public Suffix Domains
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https://www.ietf.org/archive/id/draft-levine-dbound-dns-01.txt



On Fri, Nov 30, 2018 at 8:04 PM Scott Kitterman <sklist@kitterman.com>
wrote:

> On Friday, November 30, 2018 07:33:00 PM John Levine wrote:
> > In article <3881693.rR9BVk4Dlq@kitterma-e6430> you write:
> > >2.  Externalize signaling about PSD participation.  As discussed in the
> > >Privacy Considerations (section 4.1), we were concerned about the
> privacy
> > >implications of feedback on organizational domain traffic for
> > >organizational domains that don't participate in DMARC being
> > >inappropriately captured by public suffix operators.
> >
> > It seems to me this horse left the barn a long time ago.  Mail systems
> > routinely check domains in HELO and in MAIL FROM against DNSBLs, which
> > is at least as loggy as anything a DNS version of this check will do.
> >
> > Also, if you really want to keep people from logging your queries, you
> > can set up a local mirror of the DNS zone, and update it in the usual
> > way with AXFR and IXFR.  Whatever one might have in mind for a text
> > version of this, a binary AXFR would be about as fast and IXFR of just
> > the occasional change faster.
> >
> > Take a look at my DBOUND proposal.  I think it would be just the
> > ticket for this application.
>
> I've lost track.  Which draft was that?
>
> I don't agree that a situation being bad is a reasonable reason not to try
> and
> keep it from getting worse.  I think the implications of the DMARC
> feedback
> reports are greater than logging queries.
>
> Scott K
>
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