mailbot(1) on Linux
The text b86dd016fa05, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it.
A MIME-aware autoresponder utility
Flags it lists
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-D -
-F -
-M -
-N -
-R -
-S -
-T -
-a -
-c -
-d -
-e -
-faddress -
-l -
-m -
-n -
-r -
-s -
-t