%% You should probably cite rfc8617 instead of this I-D. @techreport{ietf-dmarc-arc-protocol-09, number = {draft-ietf-dmarc-arc-protocol-09}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-dmarc-arc-protocol/09/}, author = {Kurt Andersen and Brandon Long and Steven M Jones and Murray Kucherawy}, title = {{Authenticated Received Chain (ARC) Protocol}}, pagetotal = 46, year = 2017, month = sep, day = 7, abstract = {The Authenticated Received Chain (ARC) protocol creates a mechanism whereby a series of handlers of an email message can conduct authentication of the email message as it passes among them on the way to its destination, and record the status of that authentication at each step along the handling path, for use by the final recipient in making choices about the disposition of the message. Changes in the message that might break DKIM or DMARC can be identified through the ARC set of header fields.}, }