Re: [EAI] I-D Action: draft-ietf-eai-mailinglistbis-00.txt

["John Levine" <[e-mail]>]

>>> Where does using a percent-encoded instead of a punycoded
>>> <ihost> help wrt mailing lists?  So far I think you can
>>> either keep UTF-8 "as is" or "get it right" (= 3987 + 5890).
>> 
>> I still prefer to let other people weigh in on this.

I went back and looked at that section again.  (Excuse: it's from
Randy's old draft.)  The sentence in question says: 

  Note that discussion on whether internationalized domain names
  should be percent-encoded or puny-coded, is ongoing; see <xref
  target="I-D.duerst-iri-bis" />.

In relation to ASCII mail, it's probably worth pointing out that a few
characters, notably percent and exclamation point, have been used for
routing hacks, and it's still risky to use them in e-mail addresses.
Do we think those characters will still be risky in EAI mail?  If so,
is this the right place to mention it?

I'm thinking of rewriting the section on List-* headers just to say
that the specs for encoding UTF-8 into URLs are in flux, so even in
EAI mail, it may be a challenge to create non-ASCII List-* headers
that interoperate reliably.  How's that?

Although I think that John K's \U'abcd' looks reasonable, this draft
is currently limited to describing the problems rather than guessing
how to deal with them, so it doesn't seem appropriate to mention it.

R's,
John