I have been assigned to review draft-ietf-dmarc-rfc7601bis-03 on behalf of the ops directorate. This document specifies a message header field called Authentication-Results for use with electronic mail messages to indicate the results of message authentication efforts. The document is written very clear. The only question I have is if the mechanism described in the document are actually used by popular mail-server, such as Microsoft Outlook? Thank you, Linda Dunbar