postsuper(1) on macOS
The text 4eee568439a3, 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 superintendent
Flags it lists
-
-H -
-S -
-c -
-d -
-h -
-p -
-r -
-s -
-v