The IESG has received a request from the Domain-based Message Authentication, Reporting & Conformance WG (dmarc) to consider the following document: - 'Authenticated Received Chain (ARC) Protocol' <draft-ietf-dmarc-arc-protocol-18.txt> as Experimental RFC The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the ietf@ietf.org mailing lists by 2018-11-06. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. Abstract 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 to see 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 message handling paths. ARC-enabled Internet Mail Handlers can process sets of ARC assertions to inform message disposition decisions, to identify Internet Mail Handlers that might break existing authentication mechanisms, and to convey original authentication assessments across trust boundaries. The file can be obtained via https://datatracker.ietf.org/doc/draft-ietf-dmarc-arc-protocol/ IESG discussion can be tracked via https://datatracker.ietf.org/doc/draft-ietf-dmarc-arc-protocol/ballot/ No IPR declarations have been submitted directly on this I-D.
