I would like to hold all outgoing email for certain users (all users except a few) for a set period of time, or until I approve (even if that means changing a config and restarting the service). Users should have no indication their mail was not delivered.
All the guides I am seeing show how to do this for outgoing domains, and I have found nothing for users.
Is what I want to do possible, and if so, how would I accomplish it?
Best Answer
You can use the action HOLD returned by access control.
For example:
Then you can manage the release of the hold using the postsuper command.
See the following for additional details:
http://www.postfix.org/access.5.html Pay close attention to description of HOLD action.
http://www.postfix.org/postsuper.1.html