This is a pedantic point, but I've noticed it cause confusion in casual conversation, which is why I'm mentioning it.

"IDN" means "internationalized domain name", so "IDN email" should mean "email address with an internationalized domain name in it." For example:

ASCII@IDN.IDN

In the context of universal acceptance, we are talking about "email address internationalization" (EAI), which has a broader scope---an internationalized local-part---and different RFCs than "IDN email":

Non-ASCII@IDN.IDN

On Feb 13, 2015 9:07 AM, "Jiankang Yao" <yaojk@cnnic.cn> wrote:
 
 
yes, outlook 7.0 supports and recognizes idn@idn.idn, which also receives IDN@idn via pop3.
But it can not support the sending of  idn@idn.idn via SMTP.
 
 
Jiankang Yao
 
Date: 2015-02-12 17:38
To: yaojk
Subject: Re: [UA-discuss] Microsoft outlook's support of idn email
Outlook client for windows does support and recognize idn@idn.idn Cyrillic email
It doesn't fly with hotmail / outlook web email though.

--andrei

Отправлено с iPad

Feb 12, 2015, в 2:43 PM, Jiankang Yao <yaojk@cnnic.cn> написал(а):

Hello,
 
     Is there any news about Microsoft outlook's support of idn email ?
     I heard that Microsoft will support it, but do not know the time table.
 
    thanks.
 
Jiankang Yao