innmail(1) on Linux
The text 21b87f3edb0e, as Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
Simple mail-sending program
Flags it lists
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-h -
-s
The text 21b87f3edb0e, as Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
Simple mail-sending program
-h
-s