This protocol enables clients to get and update Inbox rules (2), which are sets of conditions and associated actions. Clients use Inbox rules (2) to automatically organize, categorize, and act on messages as the messages are delivered to a folder.
Server use rules (2) on mailboxes and other folders to automatically execute actions on objects in the folders. Rules (2) are used to carry out predefined or custom actions. Rules (2) can be performed on the server message store (server-side rule) or on the client (client-side rule).