Re: Last Call: <draft-ietf-lamps-eai-addresses-05.txt> (Internationalized Email Addresses in X.509 certificates) to Proposed Standard

"John Levine" <johnl@taugh.com> Tue, 24 January 2017 02:02 UTC

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Date: 24 Jan 2017 02:01:38 -0000
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From: "John Levine" <johnl@taugh.com>
To: ietf@ietf.org
Subject: Re: Last Call: <draft-ietf-lamps-eai-addresses-05.txt> (Internationalized Email Addresses in X.509 certificates) to Proposed Standard
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In article <14A8995E-D7BF-4994-98F8-875CCED02085@frobbit.se> you write:
>> I think this needs to be discussed a bit more in the LAMPS WG, but you have a good point here.
>
>I would extend to 'starting in "XX--" where X can be any ascii character" because who knows whether we need a
>completely different prefix one day.

I hope you mean X can be any ascii letter or digit.  After all, Ctrl/C is an ASCII character.

>Or you should explicitly note that ascii-only mailboxes do imply the literal value and those strings MUST NOT
>be interpreted as A-Labels.

Urrgh.  As far as I know, this is an entirely valid ASCII address:

  fred@xn--exmple-qta.com

That domain name happens to be the A-label for exámple.com but so what?

R's,
John