WordPress is  growing and becoming more and more popular. With every day passing its functionalities are enhancing.Wordpress offers open platform to every one . Thousands of WordPress plug-in are written to enhance features of wordpress.

Unfortunately, there isn’t a way to communicate between WordPress users until now. The idea is taken from PM system of forums.So Private Messages For WordPress plugin is created for this purpose.

The Private Messages For WordPress allows users of WordPress blog send private messages (PM) to each other. Users will have their own inbox and outbox. Administrators of blog can control total numbers of items in mailbox of each user group (Administrator, Editor, Author, Constributor and Subscriber).

Link: http://wordpress.org/extend/plugins/private-messages-for-wordpress/