Issue Summary

Currently customers can add public domains such as "gmail.com" as approved domain without "admin approval" allowing anyone with a gmail account to access their confluence. It seems that its not straight forward to inexperienced admins that this would expose their confluence publicly.

Steps to Reproduce

Admin hub > user access settings > approved domains tab > add domain > (add a public domain without admin approval)

Feature request

A notification/warning/banner that informs customer they are adding a public domain (or even non-verified domains) that allows anyone with that public domain to access their site.