I'm hoping this is an easy one.
If I have a user "John Smith" and I wanted to restrict his ability to send emails to ANYONE (whether internal or external emails) EXCEPT to his Manager, is there a way to do that? I've been looking into transport rules, but can't seem to hammer down the correct configuration.
So to recap how it should work:
John sends an email to his manager --> Success
John sends an email to another internal employee --> Fails
John sends an email to an outside email address --> Fails
Not sure why it's not working, to be honest...
The rule is:
Apply this rule if
I even removed the last item, just restricting outside sending of emails, but they still go through.
The rule is enforced, and it's the highest priority.