If you would like multiple users to use the same email domain, with each user not being able to view/manage each other's email account, this addon will faciliate that. The addon works in a similar fashion to @gmail.com and @protonmail.com email providers.

With this addon, User A can have access to [email protected] and [email protected] while User B can have access to email [email protected] and both users can't manage the other's email accounts.