Joomla! Documentation™

Component	Description
Message	The Private Messaging screen allows you to send messages to other Backend Joomla users. You may read, write, send, and delete messages here. In addition, you may also manage message settings and grouping options.
Read Message	This is where you can view and reply to a single private message only.
Write Message	This screen lets you write and send private messages to others with the correct User Group permissions.
Options	Messaging Options configuration allows setting of parameters used globally for Messaging.