Domain-based Message Authentication, Reporting, and Conformance (DMARC) is an email authentication protocol first published as an RFC with Informational status in RFC 7489 - https://datatracker.ietf.org/doc/html/rfc7489
A working group to update this specification was chartered by the IETF; the working group's charter is here - https://datatracker.ietf.org/doc/charter-ietf-dmarc/
This is the github repository for issues that were opened in Datatracker for that work prior to Datatracker being replaced by GitHub for the purpose of tracking issues.