[UA-discuss] Advance Downgrading

Mark Svancarek marksv at microsoft.com
Wed Sep 6 21:32:10 UTC 2017

This is my understanding as well.

Note that Coremail also does the first part (switch seamlessly to the ASCII-only alias), but does not do the second part (populate the displayed user name with the equivalent string as the EAI address.

With this scheme user can

  1.  Send ascii alias to any server – same as composed by the user, displays “default user display name < ASCII email address>” (where the default user display name is presumably but not necessarily ASCII)
  2.  Send EAI to UTF8 server – same as composed by the user, displays “Unicode user display name <EAI email address>”
  3.  Send EAI to non-UTF8 server – different from how it was composed by the user, automagically displays “alternate user display name <ASCII email address>” (where the alternate user display address is presumably but not necessarily the same as the EAI address)
Ajay, did I get this right?
Jim, I also don’t recall exactly which field holds the user display name as opposed to the email address field – IIRC it’s in the envelope, rather than the header, but that’s probably wrong…

UASG has already listed Coremail’s technique as a recommended good practice.  We should discuss if XGenplus’s additional technique should also be recommended practice .


From: ua-discuss-bounces at icann.org [mailto:ua-discuss-bounces at icann.org] On Behalf Of Jim DeLaHunt
Sent: Wednesday, September 6, 2017 1:11 PM
To: ua-discuss at icann.org
Subject: Re: [UA-discuss] Advance Downgrading

Dr Data:


Do I understand this correctly? "Advanced downgrading" is a feature of the XGen Plus email server. When the XGen Plus email server attempts to deliver a message to an internationalised (non-ASCII) email address, it asks the receiving email server if it can accept internationalised email addresses. If the receiving server says, "No", the XGen Plus server rewrites the destination address, so that the internationalised email address goes in the personal name field, and a traditional (ASCII-only) email address goes in the email address field. This feature is activated by a control in the XGen Plus web-hosted email application.

I didn't see the video describe what the XGen Plus email server does if the receiving server says, "Yes", it can accept internationalised email addresses. I suspect that it delivers the message as-is, resulting in the best internationalised experience.

I'm pretty confident that I used the wrong terminology above. Hopefully my meaning is clear anyway.  I need to write a Unicode Conference presentation on the subject, so I'd better study up on what the correct terminology is.

Best regards,
    --Jim DeLaHunt

On 2017-09-06 10:39, Dr. AJAY D A T A wrote:
Dear Friends,

Please look at this video showing advance downgrading<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DeSIb0FFmuS8&data=02%7C01%7Cmarksv%40microsoft.com%7C9c6d27244075403121c608d4f5637f9e%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636403255122263766&sdata=0wBNqMifumfy9%2FwWrQ9cUGKU5lBp1%2BIr1XBSXoNdyTU%3D&reserved=0> technique in action.


This technique probably makes EAI mailbox much more usable and much more accepted.

Looking forward to have your suggestions / comments.

Best Regards

Dr. Ajay DATA  | Founder & CEO
Get email id like अजय@डाटा.भारत<mailto:अजय@डाटा.भारत> in your own language,
visit www.xgenplus.com<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.xgenplus.com%2F&data=02%7C01%7Cmarksv%40microsoft.com%7C9c6d27244075403121c608d4f5637f9e%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636403255122273775&sdata=R8p6Dmr2bPWmoqkv1Wv20BV%2FshnexspvKyzuz9Pnaek%3D&reserved=0>

Do not Remove:


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