zmsh(1) on Linux
The text 92934b0fe756, as Debian 2.2 (Potato) shipped it.
zmailer shell
Flags it lists
-
-C -
-I -
-L -
-O -
-P -
-R -
-S -
-Y -
-a -
-c -
-e -
-f -
-h -
-i -
-n -
-s -
-t -
-u -
-v -
-x