IMAP Support for UTF-8
draft-ietf-eai-5738bis-10

The information below is for an old version of the document
Document Type Active Internet-Draft (eai WG)
Authors Pete Resnick  , Chris Newman  , Sean Shen 
Last updated 2012-10-22
Replaces draft-ietf-eai-5378bis
Stream IETF
Intended RFC status Proposed Standard
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Internet Engineering Task Force                          P. Resnick, Ed.
Internet-Draft                                     Qualcomm Incorporated
Obsoletes: RFC5738 (if approved)                          C. Newman, Ed.
Intended status: Standards Track                                  Oracle
Expires: April 25, 2013                                     S. Shen, Ed.
                                                                   CNNIC
                                                        October 22, 2012

                         IMAP Support for UTF-8
                       draft-ietf-eai-5738bis-10

Abstract

   This specification extends the Internet Message Access Protocol
   version 4rev1 (IMAP4rev1) to support UTF-8 encoded international
   characters in user names, mail addresses and message headers.  This
   specification replaces RFC 5738.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on April 25, 2013.

Copyright Notice

   Copyright (c) 2012 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

Resnick, et al.          Expires April 25, 2013                 [Page 1]
Internet-Draft           IMAP Support for UTF-8             October 2012

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Conventions Used in this Document  . . . . . . . . . . . . . .  3
   3.  UTF8=ACCEPT IMAP Capability and UTF-8 in IMAP Quoted
       Strings  . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
   4.  IMAP UTF8 Append Data Extension  . . . . . . . . . . . . . . .  5
   5.  LOGIN Command and UTF-8  . . . . . . . . . . . . . . . . . . .  5
   6.  UTF8=ONLY Capability . . . . . . . . . . . . . . . . . . . . .  6
   7.  Dealing With Legacy Clients  . . . . . . . . . . . . . . . . .  6
   8.  Issues with UTF-8 Header Mailstore . . . . . . . . . . . . . .  8
   9.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  8
   10. Security Considerations  . . . . . . . . . . . . . . . . . . .  8
   11. References . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     11.1.  Normative References  . . . . . . . . . . . . . . . . . .  9
     11.2.  Informative References  . . . . . . . . . . . . . . . . . 10
   Appendix A.  Design Rationale  . . . . . . . . . . . . . . . . . . 10
   Appendix B.  Acknowledgments . . . . . . . . . . . . . . . . . . . 11

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1.  Introduction

   This specification forms part of the Email Address
   Internationalization protocols described in the Email Address
   Internationalization Framework document [RFC6530].  It extends
   IMAP4rev1 [RFC3501] to permit UTF-8 [RFC3629] in headers as described
   in "Internationalized Email Headers" [RFC6532].  It also adds a
   mechanism to support mailbox names using the UTF-8 charset.  This
   specification creates two new IMAP capabilities to allow servers to
   advertise these new extensions.
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