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Update to Internet Message Format to Allow Group Syntax in the "From:" and "Sender:" Header Fields (RFC6854)

IP.com Disclosure Number: IPCOM000225919D
Original Publication Date: 2013-Mar-01
Included in the Prior Art Database: 2013-Mar-13
Document File: 18 page(s) / 20K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

B. Leiba: AUTHOR

Abstract

The Internet Message Format, as far back as RFC 822 [RFC0822], has always required a usable address to appear in the "From:" header field of messages in order to allow replies to be sent. To this end, the syntax of messages, up to and including the current specification [RFC5322], has required the use of the mailbox address form in the originator ("From:" and "Sender:") fields of messages and has specifically forbidden the use of the group address form, which permits an empty list of addresses (that is, an address list with no address included that might be used for a reply).

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Internet Engineering Task Force (IETF)                          B. Leiba Request for Comments: 6854                           Huawei Technologies Updates: 5322                                                 March 2013 Category: Standards Track ISSN: 2070-1721

        Update to Internet Message Format to Allow Group Syntax in                 the "From:" and "Sender:" Header Fields

Abstract

   The Internet Message Format (RFC 5322) allows "group" syntax in some    email header fields, such as "To:" and "CC:", but not in "From:" or    "Sender:".  This document updates RFC 5322 to relax that restriction,    allowing group syntax in those latter fields, as well as in    "Resent-From:" and "Resent-Sender:", in certain situations.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at    http://www.rfc-editor.org/info/rfc6854.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    (http://trustee.ietf.org/license-info) in effect on the date of    publication of this document.  Please review these documents    carefully, as they describe your rights and restrictions with respect    to this document.  Code Components extracted from this document must    include Simplified BSD License text as described in Section 4.e of    the Trust Legal Provisions and are provided without warranty as    described in the Simplified BSD License.

Leiba                        Standards Track                    [Page 1]
 RFC 6854          Group Syntax in "From:" and "Sender:"       March 2013

 Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 2

     1.1.  Notational Conventions  . . . . . . . . . . . . . . . . . . 3

       1.1.1.  Requirements Notation . . . . . . . . . . . . . . . . . 3

       1.1.2.  Syntactic Notation  . . . . . . . . . . . . . . . . . . 3

   2.  Allowing Group Syntax in "From:" and "Sender:"  . . . . . . . . 3

     2.1.  Replacement of RFC 5322, Section 3.6.2. Originator Fields . 4

     2.2.  Update to RFC 5322, Section 3.6.6. Resent Fields  . . . . . 5

   3.  Applic...