This allows your website's visitors to send private messages to each other. It is best understood as email without being email.

Its applicable for community oriented sites such as forums and social networking sites. Many additional features are available as separate modules.

The current features include:

• send and receive private messages on a site (between multiple recipients)
• access to an inbox
• notification of a new message from a dashboard object, and even email notifications of a new message
• threaded conversations (make it easier to keep track of messages and replies)
• private message search
• tagging and filtering (helps organise conversations)
• user blocking (hiding from certain users)