How do I make it so the outbound emails only use example.com?
Create and use the account firstname.lastname@example.org.
The initial account should really only be used for admin purposes, IMHO.
This is more for system messages from the server itself.
I don’t understand. Please elaborate.
The MiaB system notices come from administrator@hostname. So no, there is not a way to change this behaviour that is within the scope of this project.