spamc(1) on Linux
The text 0ec74487eda3, as Debian 4.0 (Etch) shipped it.
client for spamd
Flags it lists
-
-B -
-E -
-F -
-H -
-R -
-S -
-U -
-V -
-c -
-d -
-h -
-l -
-p -
-r -
-s -
-t -
-u -
-x -
-y