Re: [Uta] Benjamin Kaduk's Discuss on draft-ietf-uta-smtp-require-tls-08: (with DISCUSS and COMMENT)

Benjamin Kaduk <kaduk@mit.edu> Thu, 01 August 2019 00:02 UTC

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Date: Wed, 31 Jul 2019 19:02:42 -0500
From: Benjamin Kaduk <kaduk@mit.edu>
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Subject: Re: [Uta] Benjamin Kaduk's Discuss on draft-ietf-uta-smtp-require-tls-08: (with DISCUSS and COMMENT)
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On Wed, Jul 31, 2019 at 07:58:07PM -0400, Viktor Dukhovni wrote:
> On Jul 31, 2019, at 7:05 PM, Benjamin Kaduk <kaduk@mit.edu> wrote:
> 
> > That seems likely; I don't feel a particular need to introduce skew between
> > reality and the text of the specification.  I guess, if the WG wants, we
> > could recommend SRV-ID but still allow CN-ID (but this really is up to the
> > WG and it is not part of a Discuss point given the 7672 precedent).
> 
> I don't know which MTAs, if any, support "SRV-ID" for in peer MTA
> certificates.  DNS-ID (with possible fallback on CN-ID) is the only
> option for both DANE and MTA-STS.  I don't expect that the present
> draft is the right vehicle for pushing for SRV-ID support between
> MTAs.

Sigh, my flawed brain at work again.  Thank you for keeping me honest, and
sorry for the repeated brain-os.

-Ben