RFC 8617

The Authenticated Received Chain (ARC) Protocol, July 2019

File formats:
icon for text file icon for PDF icon for HTML
K. Andersen
B. Long, Ed.
S. Blank, Ed.
M. Kucherawy, Ed.
dmarc (art)

Cite this RFC: TXT  |  XML  |   BibTeX

DOI:  https://doi.org/10.17487/RFC8617

Discuss this RFC: Send questions or comments to the mailing list dmarc@ietf.org

Other actions: View Errata  |  Submit Errata  |  Find IPR Disclosures from the IETF  |  View History of RFC 8617


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 what the message's authentication assessment was at each step in the handling.

ARC allows Internet Mail Handlers to attach assertions of message authentication assessment to individual messages. As messages traverse ARC-enabled Internet Mail Handlers, additional ARC assertions can be attached to messages to form ordered sets of ARC assertions that represent the authentication assessment at each step of the message-handling paths.

ARC-enabled Internet Mail Handlers can process sets of ARC assertions to inform message disposition decisions, identify Internet Mail Handlers that might break existing authentication mechanisms, and convey original authentication assessments across trust boundaries.

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.

Advanced Search