mailpost(8) on Linux
The text 427fded00f9a, as Debian 10 (Buster) shipped it.
Feed an e-mail message into a newsgroup
Flags it lists
-
-a -
-b -
-c -
-d -
-f -
-h -
-m -
-n -
-o -
-p -
-r -
-t -
-x -
-z