Re: [ietf-smtp] Proposed agenda for EMAILCORE BOF

John Levine <johnl@taugh.com> Mon, 27 July 2020 12:26 UTC

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Date: 27 Jul 2020 08:26:40 -0400
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From: "John Levine" <johnl@taugh.com>
To: ietf-smtp@ietf.org
Cc: moore@network-heretics.com
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Subject: Re: [ietf-smtp] Proposed agenda for EMAILCORE BOF
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In article <e2d87641-0c20-a127-7983-b50c01663c56@network-heretics.com> you write:
>On 7/23/20 11:43 AM, John Levine wrote:
>
>>>>> My reading is thay the above text clarifies to prefer 465 over 587.
>>>> Some of us disagree about how well this advice matches reality. See
>>>> you at the BOF. ...

>The client is NOT expected to fail-over to STARTTLS on a different 
>port.   The whole point of establishing the connection in advance and 
>preferring Implicit TLS is to minimize the potential for downgrade attacks.

We agree about that, but if that what 8314 is supposed to say, it's
not saying it in a way I can recognize.

R's,
John