This article is for G Suite administrators. To manage your own groups, visit the Google Groups help.
The following words can't be used in the email addresses of groups that you create in groups.google.com:
If you create groups in the Google Admin console, you can use reserved words as email addresses. However, you can't add them as email aliases for groups.
About abuse and postmaster
Abuse and postmaster are handled differently than other reserved words. To learn more about creating and using groups with these email addresses, see Understand abuse & postmaster groups.