messages.mailutils(1) on Linux
The text b976ed2d5016, as Debian 7 (Wheezy) shipped it.
count the number of messages in a mailbox
Flags it lists
-
--config-file -
--config-help -
--config-lint -
--config-verbose -
--debug-level -
--debug-line-info -
--help -
--no-site-config -
--no-site-rcfile -
--no-user-config -
--no-user-rcfile -
--quiet -
--rcfile -
--rcfile-lint -
--rcfile-verbose -
--set -
--show-config-options -
--silent -
--usage -
--version -
-? -
-V -
-q -
-s