I landed the change [1] in the last Working Draft earlier this month: https://www.w3.org/TR/2018/WD-html53-20180206/ (But I forgot to say so here) The key bit is [[[ A valid e-mail address is defined in [[!RFC6531]]. A user agent should present and consume unicode text in the user interface, and expose it to other applications, except when sending to a Mail Transfer Agent that does not support SMPTUTF8 [[RFC6531]]. ]]] - https://w3c.github.io/html/sec-forms.html#valid-e-mail-address Thanks to all those who helped make this happen. Review is still appreciated - the timeline is to freeze this draft for a W3C Recommendation in early May, so before then is a good time to provide it. We will also be looking for implementation information - basically applications, sites, etc that work with EAI addresses, so pointers are welcome. [1] https://github.com/w3c/html/commit/873ec12901a1abcd0548c1a3230beadf84c79895 cheers Chaals -- Chaals is Charles McCathie Nevile find more at http://yandex.com