I recently successfully sent email from my DataMail 小山@电邮.在线 email to my Coremail 小山@互联网.网络 email and vice versa😀
So, there is significant progress being made on support for internationalised email addresses. I have had my 小山@电邮.在线 email since Jan 6th 2017 and my 小山@互联网.网络 email for about 5 weeks.
Gmail and Microsoft do not yet allow you to register an internationalised email but DataMail and Coremail do.
If you would like a free internationalised email address, then:
Coremail ➜
互联网.网络 (Chinese only I think. I have not tried to register a non Chinese email address)
Note: Currently, not all email servers support internationalised email addresses but that is changing rapidly.
If you do register an internationalised email address, feel free to email me on one or both of my Chinese email addresses.
André Schappo