Exchange 2013 VALID Accepted Domain Names

I currently have an Exchange 2013 server with roughly 10 Accepted Domain Names.... My company would like to add another, but the domain name has a "special" character.

Is it possible to have an accepted domain name like this:


Not sure if the asterisks are valid.....
Who is Participating?
KimputerConnect With a Mentor Commented:
Only numbers letters and hyphens (and dots of course).
Will SzymkowskiSenior Solution ArchitectCommented:
** is not a valid SMTP domain. The screenshot below shows you what happens if you try and add this.
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