The Inbox (Messages, Support and Notes to self) The Inbox is your hub for two-way communication with other Plint users (or one-way in the case of Notes to self). Messages, Support cases and Notes to self each have a corresponding tab and share the following traits:  Communication is threaded (post/reply) Posts and replies result in email notifications to the recipient but communication should be kept in the system. I.e. log in and go to the Inbox to reply. Files can be attached to any post or reply. Supported formats, such as images, short film clips and PDF:s can be previewed in the browser, whereas other formats may require downloading.  Closed/Open, Read/Unread The counter in the menu and on the tab indicates the number of open items. A red counter indicates one or more unread item.  Threads can be Closed or Opened by either party at any point. Closing a Message thread or Note will simply change its status, removing it from the default view. It can still be found, and reopened if needed, by searching for Status: Closed.  Messages and Notes linked to jobs? More on this here .