H: Send a command to a specific sender. The following commands are available, but
H: not all senders support every command.
H:
-H: help, on, off, add, delete, allow, deny.
+H: help, on, off, add, delete, allow, deny, status.
H:
H: The help command prints the help text of the given sender. If no command is
H: given the list of compiled in senders is shown.