postconf(1) on macOS
The text 8f8d73624c8c, as macOS 10.12.6, macOS 10.12.5, macOS 10.12.4, macOS 10.12.3, macOS 10.12.2, macOS 10.12.1, macOS 10.12 shipped it.
Postfix configuration utility
Flags it lists
-
-# -
-A -
-C -
-F -
-H -
-M -
-P -
-T -
-X -
-a -
-b -
-c -
-d -
-e -
-f -
-h -
-l -
-m -
-n -
-o -
-p -
-t -
-v -
-x