pmailq(8) on Linux
The text 066032713748, as Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.
Postfix MAIL Queue manager
Flags it lists
-
--email -
--help -
--msg -
--size-lower -
--size-upper -
--version -
-a -
-e -
-h -
-l -
-m -
-o -
-u