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

Viktor Dukhovni <ietf-dane@dukhovni.org> Wed, 31 July 2019 23:58 UTC

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Date: Wed, 31 Jul 2019 19:58:07 -0400
From: Viktor Dukhovni <ietf-dane@dukhovni.org>
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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 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.

-- 
	Viktor.

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