support: JSON Mail Access Protocol (jmap)

[ghost]

https://datatracker.ietf.org/wg/jmap/about/
https://datatracker.ietf.org/wg/jmap
https://github.com/jmapio/jmap

JMAP (JSON Meta Application Protocol) is a protocol used for email and other data synchronization. It aims to replace traditional protocols like IMAP (Internet Message Access Protocol) and similar ones, providing a more efficient and modern way to access data. JMAP uses JSON format for data exchange, making the protocol easier to understand and use.

Key Features of JMAP:

1. JSON-Based: JMAP uses JSON as its data format, which makes it easier to integrate with modern web applications.

2. Efficient Synchronization: JMAP is designed for efficient data synchronization, reducing unnecessary data transfer and supporting incremental updates.

3. RESTful Design: JMAP follows a RESTful architectural style, using HTTP/HTTPS for communication and supporting standard HTTP methods (such as GET, POST, PUT, DELETE).

4. Multiple Data Types: In addition to email, JMAP can be used to synchronize other types of data, such as contacts and calendar events.

5. State Management: JMAP allows clients to track the state of data, supporting more complex operations like batch processing and transactions.

Use Cases for JMAP:

• Email Clients: JMAP can be used to build modern email clients that provide faster email synchronization and a better user experience.
• Mobile Applications: Due to its efficient synchronization mechanism, JMAP is well-suited for applications on mobile devices.
• Web Applications: The RESTful nature of JMAP makes it suitable for integration with web applications.

In summary, JMAP is a modern protocol designed to enhance the efficiency and flexibility of data synchronization, catering to the needs of today's internet applications.

[charlag]

JMAP explicitly excludes e2e support, I don't think it's an option for us