I have two Mil email addresses. One I don't let on about and the other one.
The other one, that everyone knows about, forwards my mail to the one others don't know about and sends a message back to the originator that I cannot be reached and the email bounced.
Makes for a quiet life.
Does mean I have to be careful replying.
And as far as naming and FOI? Easy. Set up a rule that diverts all emails to the Delete folder. Set Outlook to empty the delete folder when you log off.
Drag emails you actually want somewhere else.