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Re: Mandatory STARTTLS ?

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John Levine  wrote:
> In the IETF last call about the SMTP applicability statement, we are
> having a long argument about making STARTTLS mandatory.

That is/was a mess.

> The other group says there are still corner cases where plain text is
> useful, e.g., dusty printers saying they're out of paper, or mail to
> postmaster telling him that his cert has expired, and if you want to

Or TLS versions/implementations/... incompatibilities or ...

> mandate TLS on your own system, you have MTA-STS and DANE.

And other options, e.g., an admin can configure sendmail that way
if they think it is needed.

> What do you think?  Any chance sendmail would completely remove non-STARTTLS
> mail?

No.

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Mandatory STARTTLS ? John Levine <johnl@taugh.com> - 2026-01-29 19:45 +0000
  Re: Mandatory STARTTLS ? Claus Aßmann <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org> - 2026-01-30 00:57 -0500
  Re: Mandatory STARTTLS ? Marco Moock <mm@dorfdsl.de> - 2026-01-30 07:38 +0100

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