Originally Posted by zburns
What if I have a list of trusted domains that I would like to allow to email any or all users of this "restricted" domain. Could that be possible.
Any everything is running on this one server - so I can't make any general postfix setting that affect our working domains.
Never allow mail sending based on domians, this will open up your server for spammers as sender domains can be easily forged. Use smtp-auth instead.