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Does exchange support marcon email addresses?

Courtney Peel 41 Reputation points
2021-08-02T03:02:54.117+00:00

I'm looking to confirm if it is possible and supported my Exchange Server to have a macron email address as below?

Example:

Mōrena@ssss .com

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Andy David - MVP 148.1K Reputation points MVP
    2021-08-02T12:08:28.083+00:00

    Not supported by the RFC:

    https://datatracker.ietf.org/doc/html/rfc5321

    Systems MUST NOT define mailboxes in such a way as to require the use in SMTP of non-ASCII characters (octets with the high order bit set to one) or ASCII "control characters" (decimal value 0-31 and 127). These characters MUST NOT be used in MAIL or RCPT commands or other commands that require mailbox names.

    However, I do not believe on-prem Exchange supports https://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol#SMTPUTF8

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