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DOI: https://doi.org/10.17487/RFC6652
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This memo presents extensions to the Abuse Reporting Format (ARF) andSender Policy Framework (SPF) specifications to allow for detailedreporting of message authentication failures in an on-demand fashion.
This memo updates RFC 4408 by providing an IANA registry for SPFmodifiers. [STANDARDS-TRACK]
For the definition ofStatus,seeRFC 2026.
For the definition ofStream, seeRFC 8729.