POP3 Support for UTF-8
RFC 5721
Document | Type |
RFC - Experimental
(February 2010; No errata)
Obsoleted by RFC 6856
Was draft-ietf-eai-pop (eai WG)
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Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5721 (Experimental) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Alexey Melnikov | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) R. Gellens Request for Comments: 5721 QUALCOMM Incorporated Category: Experimental C. Newman ISSN: 2070-1721 Sun Microsystems February 2010 POP3 Support for UTF-8 Abstract This specification extends the Post Office Protocol version 3 (POP3) to support un-encoded international characters in user names, passwords, mail addresses, message headers, and protocol-level textual error strings. Status of This Memo This document is not an Internet Standards Track specification; it is published for examination, experimental implementation, and evaluation. This document defines an Experimental Protocol for the Internet community. 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). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see 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/rfc5721. 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. Gellens & Newman Experimental [Page 1] RFC 5721 POP3 Support for UTF-8 February 2010 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 1.1. Conventions Used in This Document . . . . . . . . . . . . 3 2. LANG Capability . . . . . . . . . . . . . . . . . . . . . . . 4 3. UTF8 Capability . . . . . . . . . . . . . . . . . . . . . . . 6 3.1. The UTF8 Command . . . . . . . . . . . . . . . . . . . . . 7 3.2. USER Argument to UTF8 Capability . . . . . . . . . . . . . 9 4. Native UTF-8 Maildrops . . . . . . . . . . . . . . . . . . . . 9 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10 6. Security Considerations . . . . . . . . . . . . . . . . . . . 10 7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7.1. Normative References . . . . . . . . . . . . . . . . . . . 10 7.2. Informative References . . . . . . . . . . . . . . . . . . 11 Appendix A. Design Rationale . . . . . . . . . . . . . . . . . . 12 Appendix B. Acknowledgments . . . . . . . . . . . . . . . . . . . 12 Gellens & Newman Experimental [Page 2] RFC 5721 POP3 Support for UTF-8 February 2010 1. Introduction This document forms part of the Email Address Internationalization (EAI) experiment described in the EAI Framework document [RFC4952] (for background, please see the charter of the EAI working group) and should be evaluated within the context of EAI. As part of the overall EAI work, email messages may be transmitted and delivered containing un-encoded UTF-8 characters, and mail drops that are accessed using POP3 [RFC1939] might natively store UTF-8. This specification extends POP3 [RFC1939] using the POP3 extension mechanism [RFC2449] to permit un-encoded UTF-8 [RFC3629] in headers, as described in "Internationalized Email Headers" [RFC5335]. It also adds a mechanism to support login names and passwords outside theShow full document text