Sieve Email Filtering: Delivery Status Notifications and Deliver-By Extensions, October 2010
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This document describes the "envelope-dsn", "redirect-dsn", "envelope-deliverby", and "redirect-deliverby" extensions to the Sieve email filtering language. The "envelope-dsn" and "envelope- deliverby" extensions provide access to additional envelope information provided by the delivery status notification (DSN) and Deliver-By SMTP extensions, respectively. The "redirect-dsn" and "redirect-deliverby" extensions extend Sieve's redirect action to provide control over delivery status notification and Deliver-By parameters, respectively. [STANDARDS-TRACK]
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.