Re: [TLS] Fwd: New Version Notification for draft-moriarty-tls-oldversions-diediedie-00.txt

Viktor Dukhovni <ietf-dane@dukhovni.org> Tue, 10 July 2018 18:04 UTC

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Date: Tue, 10 Jul 2018 14:04:38 -0400
From: Viktor Dukhovni <ietf-dane@dukhovni.org>
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Subject: Re: [TLS] Fwd: New Version Notification for draft-moriarty-tls-oldversions-diediedie-00.txt
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On Tue, Jul 10, 2018 at 09:21:04AM +0100, Stephen Farrell wrote:

> I didn't have time before the I-D cutoff but have since
> added a section on mail to the repo pre-01 version. (See
> [1] section 3.2.) I'd love to add more detail like that
> and/or more sections for other protocols if folks have
> data to offer with references.

The numbers for MX hosts with working DANE TLSA records are:

    4337  TLS 1.2
      63  TLS 1.0
       5  TLS 1.1

These are early adopters of enhanced SMTP security, so one would
expect to find modern software and an emphasis on security, and
yet, for >1% of the MX hosts, their SMTP server libraries fail to
negotiate TLS 1.2.  Presumably, the broader MTA population has a
higher incidence of TLS 1.0-only servers.

-- 
	Viktor.