https://app.knowbase.one/vault/rfc/docid/6759
RFC6212: Authentication-Results Registration for Vouch by Reference Results
Internet Engineering Task Force (IETF) M. Kucherawy Request for Comments: 6212 Cloudmark, Inc. Category: Standards Track April 2011 ISSN: 2070-1721 Authentication-Results Registration for Vouch by Refer...