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Please refer here for any errata for this document. To submit a new errata report, go to the main errata page.
This document defines a set of extended status codes for use within the mail system for delivery status reports, tracking, and improved diagnostics. In combination with other information provided in the Delivery Status Notification (DSN) delivery report, these codes facilitate media and language independent rendering of message delivery status. [STANDARDS-TRACK]
For the definition of Stream, see RFC 4844.