imsort(1p) on Linux
The text 8e4da0ad012a, as Debian 3.1 (Sarge) shipped it.
sort mail/news messages
Flags it lists
-
--debug -
--field -
--help -
--mode -
--noharm -
--src -
--verbose -
--version -
-f -
-h -
-m -
-n -
-s -
-v