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Re: [EAI] Rather serious bug in RFC 6531

John Levine <johnl@taugh.com> Mon, 04 January 2021 17:32 UTC

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From: John Levine <johnl@taugh.com>
To: ima@ietf.org
In-Reply-To: <f8ef03e7-59da-9753-9dad-4dc992b046eb@isode.com>
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Subject: Re: [EAI] Rather serious bug in RFC 6531
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In article <f8ef03e7-59da-9753-9dad-4dc992b046eb@isode.com> you write:
>My personal opinion is that the likelyhood of older versions being 
>implemented is low and my desire to minimize number of different WITH 
>keywords is high, so I think the decision in RFC 6531 not to change 
>keywords is the right one.

Having just done some EAI compliance tests for the UASG, I can report
that all the systems that have any EAI support at all do what the RFC
says. The SMTP keyword is SMTPUTF8, and the WITH clause is UTF8SMTP.
(Well, except for Microsoft whose WITH clauses are wrong with or
without EAI.)

At this point I am not aware of any live implmentations of the experimental
version other than in IMAP at Coremail, and that one is sufficiently broken 
that I doubt anyone is using it.

I agree we should leave it alone.

R's,
John

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