Re: [dmarc-ietf] Definition of "value" in RFC8601

John Levine <johnl@taugh.com> Wed, 01 April 2020 21:05 UTC

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From: "John Levine" <johnl@taugh.com>
To: dmarc@ietf.org
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Subject: Re: [dmarc-ietf] Definition of "value" in RFC8601
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In article <5c650beb-f0b7-5cae-3070-b7005dec9dbe@arcsin.de> you write:
>> It's the one you found.  If the authserv-id has a non-ASCII UTF-8 character,
>> it's invalid under 5321 and valid under 6531.
>
>I thought we established that as soon as the authserv-id has non-ASCII
>UTF-8 characters, the mail is automatically - by definition - a 6531 mail:

Sorry if it seemed like I said that.  It's either a potentially valid
EAI message or a definitely invalid ASCII message.  If your system
doesn't handle EAI mail, it's invalid.  If there are bytes with the
high bit set but they're not a UTF-8 sequence, or they're not a UTF-8
character allowed in an authserv-id it's invalid even if you handle
EAI.

R's,
John