An Apple patent (number 20120221961) for addressee-based message prioritization at the U.S. Patent & Trademark Office, showing that the company is looking to automate email sorting on its various devices.
Per the patent, in some implementations, messages received by an electronic messaging user (e.g., recipient) can be displayed in a user interface of an electronic messaging application. In some implementations, received messages can be prioritized based on how the messages are addressed to the user. In some implementations, received message can be displayed and highlighted based on the priority of each message. In some implementations, messages can be grouped and/or sorted based on the priority of each message.
Here's Apple's background and summary of the invention: "The volume of electronic messages (e.g., e-mail, text messages) sent and received by users can be overwhelming. As the volume of electronic messages received by users increases, it becomes...| Read more »