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Re: [Uta] SMTP Over TLS on Port 26 - Implicit TLS Proposal

Peter Gutmann <pgut001@cs.auckland.ac.nz> Wed, 09 January 2019 02:29 UTC

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From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: John Levine <johnl@taugh.com>, "uta@ietf.org" <uta@ietf.org>
CC: "alice@domblogger.net" <alice@domblogger.net>
Thread-Topic: [Uta] SMTP Over TLS on Port 26 - Implicit TLS Proposal
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Date: Wed, 09 Jan 2019 02:29:29 +0000
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Subject: Re: [Uta] SMTP Over TLS on Port 26 - Implicit TLS Proposal
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John Levine <johnl@taugh.com> writes:

>10% is a pretty fat long tail.  The people I know who run production mail
>systems are much more concerned about receiving all of the real mail than
>rejecting spam earlier.

There's also a near-infinite amount of embedded and IoT that uses email to
send out alerts of abnormal conditions, or even just routine status updates.
Getting all that switched to TLS is going to take the lifetime of the
equipment, and possibly the lifetime of its replacement as well.

Peter.

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