for G Suite / for Office 365
What characters can I set for "Mail Groups"?
The following characters can be used.
-_.+ a-z 0-9 @
*They are not case-sensitive.
Capital letters and lowercase letters are identified as the same characters.
*If you want to use characters other than the ones above, you can set them in "Rule Groups".
If you have any questions, please feel free to contact the Customer Success Guide team.