SMTP Extension for Internationalized Email
RFC 6531
Document | Type |
RFC - Proposed Standard
(February 2012; Errata)
Obsoletes RFC 5336
|
|
---|---|---|---|
Authors | Wei MAO , Jiankang Yao | ||
Last updated | 2017-04-18 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6531 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Pete Resnick | ||
IESG note | Note that this document has 2 DownRefs to Informational documents: [RFC4952bis] and [RFC2033]. | ||
Send notices to | alexey.melnikov@isode.com |
Internet Engineering Task Force (IETF) J. Yao Request for Comments: 6531 W. Mao Obsoletes: 5336 CNNIC Category: Standards Track February 2012 ISSN: 2070-1721 SMTP Extension for Internationalized Email Abstract This document specifies an SMTP extension for transport and delivery of email messages with internationalized email addresses or header information. 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/rfc6531. 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 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 Yao & Mao Standards Track [Page 1] RFC 6531 SMTP Extension for SMTPUTF8 February 2012 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 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 1.2. Changes Made to Other Specifications . . . . . . . . . . . 3 2. Overview of Operation . . . . . . . . . . . . . . . . . . . . 4 3. Mail Transport-Level Protocol . . . . . . . . . . . . . . . . 4 3.1. Framework for the Internationalization Extension . . . . . 4 3.2. The SMTPUTF8 Extension . . . . . . . . . . . . . . . . . . 5 3.3. Extended Mailbox Address Syntax . . . . . . . . . . . . . 7 3.4. MAIL Command Parameter Usage . . . . . . . . . . . . . . . 8 3.5. Non-ASCII Addresses and Reply-Codes . . . . . . . . . . . 9 3.6. Body Parts and SMTP Extensions . . . . . . . . . . . . . . 9 3.7. Additional ESMTP Changes and Clarifications . . . . . . . 10 3.7.1. The Initial SMTP Exchange . . . . . . . . . . . . . . 10 3.7.2. Mail eXchangers . . . . . . . . . . . . . . . . . . . 10 3.7.3. Trace Information . . . . . . . . . . . . . . . . . . 11 3.7.4. UTF-8 Strings in Replies . . . . . . . . . . . . . . . 11 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13 4.1. SMTP Service Extensions Registry . . . . . . . . . . . . . 13 4.2. SMTP Enhanced Status Code Registry . . . . . . . . . . . . 13 4.3. WITH Protocol Types Sub-Registry of the Mail Transmission Types Registry . . . . . . . . . . . . . . . 15 5. Security Considerations . . . . . . . . . . . . . . . . . . . 15 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 16 7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.1. Normative References . . . . . . . . . . . . . . . . . . . 16 7.2. Informative References . . . . . . . . . . . . . . . . . . 18 Yao & Mao Standards Track [Page 2] RFC 6531 SMTP Extension for SMTPUTF8 February 2012 1. Introduction The document defines a Simple Mail Transfer Protocol [RFC5321] extension so servers can advertise the ability to accept and process internationalized email addresses (see Section 1.1) and internationalized email headers [RFC6532].Show full document text