[Bug 15489] Add an attribute <input type=email idna> that allows IDNA e-mail addresses to be round-tripped

https://www.w3.org/Bugs/Public/show_bug.cgi?id=15489

--- Comment #24 from John C Klensin <john+w3cbugs@jck.com> ---
Separately, it is worth noting that the internationalized email specs (RFCs
6530-6533 and 6855-6858) rather strongly discourage the use of Punycode-encoded
strings in email addresses.  Conversion of the local part of such an address
(before the "@") loses information and, because the character repertoire
requirements are different, may cause other problems.  The domain part can be
in A-label form (the preferred terminology these days), but, under normal
circumstances, the conversion should be performed just before DNS lookup, not
earlier in the application for reasons explained in RFC 6055.

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Received on Thursday, 14 March 2013 13:17:31 UTC