USER MODE c

Usage: UMODE +|-c
Usage: MODE <nick> +|-c
c - Clients
This will show all clients as they enter and exit the server.
Privilege: operator
Examples:
/mode jimmers +c
/umode +c

USER MODE C

Usage: UMODE +|-C
Usage: MODE <nick> +|-C
C - Channel exception for +m
This mode is only effective if you have UMODE +m set, it allows users to message you if they are in a channel with you.
By using +m and +C, you can make sure only users you see in channels can message you, so spamming or flooding from outside is not possible.
Privilege: user
Examples:
/mode jimmers +C
/umode +C
See also: UMODE +M