Support for creating and parsing Delivery Status Notifications. Refer to RFC 3462 and RFC 3464 for more information.

A Delivery Status Notification is a MIME message with a Content-Type of `multipart/report`. A {@link com.sun.mail.dsn.MultipartReport MultipartReport} object represents the content of such a message. The MultipartReport object contains several parts that represent the information in a delivery status notification. The first part is usually a `text/plain` part that describes the reason for the notification. The second part is a `message/delivery-status` part, which is represented by a {@link com.sun.mail.dsn.DeliveryStatus DeliveryStatus} object, and contains details about the notification. The third part is either an entire copy of the original message that is returned, represented by a {@link javax.mail.internet.MimeMessage MimeMessage} object, or just the headers of the original message, represented by a {@link com.sun.mail.dsn.MessageHeaders MessageHeaders} object.

To use the classes in this package, include `dsn.jar` in your class path.

WARNING: The APIs unique to this package should be considered EXPERIMENTAL. They may be changed in the future in ways that are incompatible with applications using the current APIs.