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Ways to create Unicode email address?
in General
I have registered a domain like ডোমেইন.বাংলা and wish to use email addresses like ব্যাবহারকারী@ডোমেইন.বাংলা
What are the ways I can make that work? Self-hosted, free or at a low price.
I tried with DirectAdmin, GSuite Legacy and Zoho. None is allowing ব্যাবহারকারী at the email username or forwarding. Zoho won't even allow the domain.

Comments
Even if a mail server can send/receive unicode email addresses, I doubt many clients would support it.
Thats an extreme niche usecase. Selfhost is the way since i doubt many drop in mainstream provider support that. Be sure to read relevant rfc spec.
With GSuite Legacy I am being able to make user@ডোমেইন.বাংলা work. But not being to use ব্যাবহারকারী@ডোমেইন.বাংলা in any way.
Have you tried stalwart? If not supported, good chance they could.
Wasn't GSuite Legacy moved to the same platform as the business GSuite?
Convert it to punycode and use the punycode version. I do this with a few RtL email addresses.
অনেক সুন্দর ডোমেইন
This is the correct answer.