Postfix block users from sending to ALL addresses except for specific addresses
Greetings, I am attempting to limit specific local users from sending mail to ALL addresses except members of my management team.
Basically I want our sales agents to be able to receive important emails/bulletins from management, but only be able to reply to and send email to the members of management.
Initially I figured I would just block their ability to send altogether with /etc/postfix/access but then decided it would be nice to give them the ability to email management if necessary. If there are no other solutions, I will probably just defer to this.
I have it setup so they cant send to or receive email from the outside world, I just want to limit WHO they can send email TO within the company. Unfortunately many of my staff would abuse the privilege if I allowed them to email anyone internally.
Thank you in advance for your suggestions.