[xoz]

Unrelated but for any Googlers, you can't add a domain to Google Workspace if it has the word 'mail' on it. Perhaps makes sense for fraud but we were working with a company that does something physical mail-related and were unable to use Google workspace.

[tomcam]

They also have a list of restricted words for email addresses. For example, you can’t create a gmail address with Support in the name.