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The Authenticated Received Chain (ARC) Protocol published as RFC 8617 addresses authentication failures in complex mail flows.Read more about the new ARC protocol
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Domain-based Message Authentication, Reporting & Conformance (DMARC) uses existing mail authentication technologies (SPF and DKIM) to extend validation to the RFC5322.From field. DMARC use...dmarc active email@example.com
The Authenticated Received Chain (ARC) protocol provides an authenticated "chain of custody" for a message, allowing each entity that handles the message to see what entities handled it before and ...RFC 8617 was: draft-ietf-dmarc-arc-protocol firstname.lastname@example.org