SECURITY SET CHANNELONLY

Usage: SECURITY SET CHANNELONLY [on|off]

Disable all private messages on the server. This means that users will only be able to send channel messages, or system notices (for administrators).

Examples:
/as security set channelonly on

There are applications where you do not want users to be able to message each other. This mode is for those applications that require tighter security than a modelock on umode +m