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The 'mailto' URI Scheme
RFC 6068

Document type: RFC - Proposed Standard (October 2010; Errata)
Obsoletes RFC 2368
Was draft-duerst-mailto-bis (individual in app area)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 6068 (Proposed Standard)
Responsible AD: Alexey Melnikov
Send notices to: lmm@acm.org, duerst@it.aoyama.ac.jp, jwz@jwz.org, ned.freed@mrochek.com

Internet Engineering Task Force (IETF)                         M. Duerst
Request for Comments: 6068                      Aoyama Gakuin University
Obsoletes: 2368                                              L. Masinter
Category: Standards Track                     Adobe Systems Incorporated
ISSN: 2070-1721                                              J. Zawinski
                                                              DNA Lounge
                                                            October 2010

                        The 'mailto' URI Scheme

Abstract

   This document defines the format of Uniform Resource Identifiers
   (URIs) to identify resources that are reached using Internet mail.
   It adds better internationalization and compatibility with
   Internationalized Resource Identifiers (IRIs; RFC 3987) to the
   previous syntax of 'mailto' URIs (RFC 2368).

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/rfc6068.

Duerst, et al.               Standards Track                    [Page 1]
RFC 6068                 The 'mailto' URI Scheme            October 2010

Copyright Notice

   Copyright (c) 2010 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.

   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.  Syntax of a 'mailto' URI . . . . . . . . . . . . . . . . . . .  3
   3.  Semantics and Operations . . . . . . . . . . . . . . . . . . .  7
   4.  Unsafe Header Fields . . . . . . . . . . . . . . . . . . . . .  7
   5.  Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
   6.  Examples . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     6.1.  Basic Examples . . . . . . . . . . . . . . . . . . . . . .  9
     6.2.  Examples of Complicated Email Addresses  . . . . . . . . . 10
     6.3.  Examples Using UTF-8-Based Percent-Encoding  . . . . . . . 11
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 12
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 14
     8.1.  Update of the Registration of the 'mailto' URI Scheme  . . 14
     8.2.  Registration of the Body Header Field  . . . . . . . . . . 15
   9.  Main Changes from RFC 2368 . . . . . . . . . . . . . . . . . . 15
   10. Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 15
   11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 16
     11.1. Normative References . . . . . . . . . . . . . . . . . . . 16
     11.2. Informative References . . . . . . . . . . . . . . . . . . 17

Duerst, et al.               Standards Track                    [Page 2]
RFC 6068                 The 'mailto' URI Scheme            October 2010

1.  Introduction

   The 'mailto' URI scheme is used to identify resources that are
   reached using Internet mail.  In its simplest form, a 'mailto' URI
   contains an Internet mail address.  For interactions that require

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