WordPress provides endless possibilities to the developers and one such ease is the ability to add a private message in your websites.
Private message system is a boost to the multi-writer blogs or questions or FAQ sites.
In order to do this, Front End PM Plugin needs to be installed. It is quite easy to install and activate.
It facilitates adding the code by pasting on an existing WordPress page or creating a new page by following instructions.
The plugin is highly customized to allow a number of settings in order to create the system according to your needs.
It has special features of blocking messages from certain users, specify number of messages that can be stored and also set a specific level that needs to be passed by users in order to use this board.
With the possible front-end modifications, it creates a whole new set of options for users that visit your websites or forums and do not need admin access to do so.
Users can choose between options of turning the notifications and announcements on or off and this creates so much flexibility in dealing WordPress.
read the article here:http://www.wpbeginner.com/plugins/how-to-add-a-private-messaging-system-in-wordpress