I have a very simple postfix relay set up with client.access, sender.access and
recipient.access rules. I need to set it up such that it will relay *all
addresses* from a specific host, but keep the default rejection for all other
hosts unless the address is specified in sender.access or recipient.access. In
other words, for one specific host, I want to disable rejection for all email
addresses. I've read a ton of documentation, but don't see a way to accomplish
this. My original thought was that it has to be a common configuration, but I'm
not able to find specific examples of configuring it. Any help would be
appreciated.