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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 memo presents extensions to the Abuse Reporting Format (ARF) and Sender Policy Framework (SPF) specifications to allow for detailed reporting of message authentication failures in an on-demand fashion. This memo updates RFC 4408 by providing an IANA registry for SPF modifiers. [STANDARDS-TRACK]
For the definition of Stream, see RFC 4844.