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[Last-Call] Re: [Emailcore] draft-ietf-emailcore-as-28 ietf last call Secdir review

Martin Thomson <mt@lowentropy.net> Wed, 29 April 2026 22:03 UTC

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Date: Thu, 30 Apr 2026 08:02:56 +1000
From: Martin Thomson <mt@lowentropy.net>
To: Eliot Lear <lear@lear.ch>, Pete Resnick <resnick=40episteme.net@dmarc.ietf.org>, Eric Rescorla <ekr@rtfm.com>
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Subject: [Last-Call] Re: [Emailcore] draft-ietf-emailcore-as-28 ietf last call Secdir review
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On Wed, Apr 29, 2026, at 22:48, Eliot Lear wrote:
> We've been through this before.  At one point Ubuntu silently updated 
> the default behavior of sendmail (and I think postfix) across a major 
> upgrade to reject TLS 1.0 and 1.1.  Administrators had a choice in that 
> case: re-enable TLS 1.0 and 1.1 or not receive email because a number 
> of MSPs were still using those versions. And that was just changing a 
> default.

That is profoundly not a problem for the domain of standards.

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