Receive only users

Hi, does anyone know how to setup a recieve only user? By that I mean a user that cannot reply to messages only recieve notifications via Broadcast or PM.

You will have to create a plugin for that, similar to what I had to do. For my purpose I had to disable all IMs sent by the user. In your situation it would be no different. All you would have to do is check to see if the user sending an IM is authorized to send, otherwise reject it.