An EAI address can be in following form while receiving from various email clients / servers. 

  1. उपयोगकर्ता@ xn--p1b6ci4b4b3a.xn--11b4c3d   (local part in Unicode,domain part in puny code)
  2. उपयोगकर्ता@उदाहरण.कॉम (both part in Unicode)
  3.  xn--p1byf7c1a4aj7iyexa@ xn--p1b6ci4b4b3a.xn--11b4c3d  (both part in puny code , theoretical it is wrong as local part can not be in punycode)
  4. xn--p1byf7c1a4aj7iyexa@उदाहरण.कॉम (local part in punycode,domain part in Unicode, theoretical it is wrong as local part can not be in punycode )
  5. ?utf-8?B?5biw5Y2X55yf5piH?=@mattkeenan.net (local part in Unicode encoded with base64, domain part in ASCII)
  6. ?utf-8?B?5biw5Y2X55yf5piH?=@उदाहरण.कॉम  (local part in Unicode encoded with base64, domain part in unicode)
  7. ?utf-8?B?5biw5Y2X55yf5piH?=@ xn--p1b6ci4b4b3a.xn--11b4c3d   (local part in Unicode encoded with base64, domain part in punycode)
  8. test@xn--p1b6ci4b4b3a.xn--11b4c3d (local part in ASCII ,domain part in puny code)
  9. test@उदाहरण.कॉम ( local part in ASCII , domain part in Unicode).
and XgenPlus (email server) and Spamjadoo (antispam) do support all of them. 
 
 
Dr. Ajay DATA  | Founder & CEO 
Get email id like अजय@डाटा.भारत in your own language,
visit www.xgenplus.com 

From: Lars Steffen <lars.steffen@eco.de>  MailId : [64366341]
To: "Tan Tanaka,Dennis" <dtantanaka@verisign.com>,Don Hollander <don.hollander@icann.org>,"ua-eai@icann.org" <ua-eai@icann.org>
Subject: Re: [UA-EAI] Quick Guide to EAI
Date: 15 Dec 2016 03:40:08 PM

Hi Don,

First of all it looks great – thank you for this. Next to the points already mentioned and discussed I just want to add that we should link to the “good practice guides for Linkification” and “good practice guides for validation of domain name” mentioned on page 2.

All best,

Lars

 

Von: ua-eai-bounces@icann.org [mailto:ua-eai-bounces@icann.org] Im Auftrag von Tan Tanaka, Dennis
Gesendet: Dienstag, 13. Dezember 2016 22:40
An: Don Hollander <don.hollander@icann.org>; ua-eai@icann.org
Betreff: Re: [UA-EAI] Quick Guide to EAI

 

Don,

 

Some comments:

 

<![if !supportLists]>1.       <![endif]>In the example, under “username” it is suggested that “punycode” (i.e. xn--abc123) is acceptable. IMO, this is wrong. I’m almost sure the protocol doesn’t require this.

<![if !supportLists]>2.       <![endif]>Same thing for second-level and top-level domains. We should not encourage software to display the A-label to end users. A-label is for the wire. Users should see only the U-label. After all , UA is about processing and displaying domain names in a proper manner.

<![if !supportLists]>3.       <![endif]>EAI is about Unicode, so not sure why the “ASCII or Unicode” bullet points. This can be interpreted that ASCII-only email addresses are EAI too.

<![if !supportLists]>4.       <![endif]>Since we are mentioning the idea of an authoritative list of TLDs, we should point the reader where to find one.

 

My two quick cents,

Dennis

 

From: <ua-eai-bounces@icann.org> on behalf of Don Hollander <don.hollander@icann.org>
Date: Tuesday, December 13, 2016 at 3:48 PM
To: "ua-eai@icann.org" <ua-eai@icann.org>
Subject: [EXTERNAL] [UA-EAI] Quick Guide to EAI

 

Dear all:

 

Here’s the finished (I hope) product – Quick Guide to EAI.

 

Can you please review and provide comments (including endorsement) by the end of this week?

 

Thanks.


Don

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