On Mon, Jan 26, 2015 at 02:20:45PM -0500, Wietse Venema wrote: > Delivery dependent on the combination of (sender AND recipient) is > not implemented in Postfix itself (actually, delivery based on any > combination of properties isn't implemented in Postfix itself).
Specifically, content filters aside, the recipient address always determines the address class (local, ..., relay, default). And once the recipient is determined to be remote, there is some wiggle room for selecting a sender dependent transport or relay. -- Viktor.