A new Request for Comments is now available in online RFC libraries.
RFC 5451
Title: Message Header Field for Indicating
Message Authentication Status
Author: M. Kucherawy
Status: Standards Track
Date: April 2009
Mailbox: msk+ietf@sendmail.com
Pages: 43
Characters: 97404
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-kucherawy-sender-auth-header-20.txt
URL: http://www.rfc-editor.org/rfc/rfc5451.txt
This memo defines a new header field for use with electronic mail
messages to indicate the results of message authentication efforts.
Any receiver-side software, such as mail filters or Mail User Agents
(MUAs), may use this message header field to relay that information
in a convenient way to users or to make sorting and filtering
decisions. [STANDARDS TRACK]
This is now a Proposed Standard Protocol.
STANDARDS TRACK: This document specifies an Internet standards track
protocol for the Internet community,and requests discussion and suggestions
for improvements. Please refer to the current edition of the Internet
Official Protocol Standards (STD 1) for the standardization state and
status of this protocol. Distribution of this memo is unlimited.
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