Internationalized Delivery Status and Disposition Notifications
RFC 5337
| Document | Type |
RFC - Experimental
(September 2008; Errata)
Obsoleted by RFC 6533
Updated by RFC 7717
Was draft-ietf-eai-dsn (eai WG)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | WG Document | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5337 (Experimental) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Lisa Dusseault | ||
| Send notices to | (None) | ||
Network Working Group C. Newman
Request for Comments: 5337 Sun Microsystems
Updates: 3461, 3464, 3798 A. Melnikov, Ed.
Category: Experimental Isode Ltd
September 2008
Internationalized Delivery Status and Disposition Notifications
Status of This Memo
This memo defines an Experimental Protocol for the Internet
community. It does not specify an Internet standard of any kind.
Discussion and suggestions for improvement are requested.
Distribution of this memo is unlimited.
Abstract
Delivery status notifications (DSNs) are critical to the correct
operation of an email system. However, the existing Draft Standards
(RFC 3461, RFC 3462, RFC 3464) are presently limited to US-ASCII text
in the machine-readable portions of the protocol. This specification
adds a new address type for international email addresses so an
original recipient address with non-US-ASCII characters can be
correctly preserved even after downgrading. This also provides
updated content return media types for delivery status notifications
and message disposition notifications to support use of the new
address type.
This document experimentally extends RFC 3461, RFC 3464, and RFC
3798.
Newman & Melnikov Experimental [Page 1]
RFC 5337 Internationalized DSN and MDNs September 2008
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions Used in This Document . . . . . . . . . . . . . . 3
3. UTF-8 Address Type . . . . . . . . . . . . . . . . . . . . . . 3
4. UTF-8 Delivery Status Notifications . . . . . . . . . . . . . 6
4.1. Additional Requirements on SMTP Servers . . . . . . . . . 8
5. UTF-8 Message Disposition Notifications . . . . . . . . . . . 9
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
6.1. UTF-8 Mail Address Type Registration . . . . . . . . . . . 10
6.2. Update to 'smtp' Diagnostic Type Registration . . . . . . 11
6.3. message/global-headers . . . . . . . . . . . . . . . . . . 11
6.4. message/global-delivery-status . . . . . . . . . . . . . . 12
6.5. message/global-disposition-notification . . . . . . . . . 13
7. Security Considerations . . . . . . . . . . . . . . . . . . . 15
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.1. Normative References . . . . . . . . . . . . . . . . . . . 15
8.2. Informative References . . . . . . . . . . . . . . . . . . 16
Appendix A. Acknowledgements . . . . . . . . . . . . . . . . . . 17
Newman & Melnikov Experimental [Page 2]
RFC 5337 Internationalized DSN and MDNs September 2008
1. Introduction
When an email message is transmitted using the UTF8SMTP [RFC5336]
extension and Internationalized Email Headers [RFC5335], it is
sometimes necessary to return that message or generate a Message
Disposition Notification (MDN) [RFC3798]. As a message sent to
multiple recipients can generate a status and disposition
notification for each recipient, it is helpful if a client can
correlate these notifications based on the recipient address it
provided; thus, preservation of the original recipient is important.
This specification describes how to preserve the original recipient
and updates the MDN and DSN formats to support the new address types.
2. Conventions Used in This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
The formal syntax use the Augmented Backus-Naur Form (ABNF) [RFC5234]
notation including the core rules defined in Appendix B of RFC 5234
[RFC5234] and the UTF-8 syntax rules in Section 4 of [RFC3629].
3. UTF-8 Address Type
An Extensible Message Format for Delivery Status Notifications
[RFC3464] defines the concept of an address type. The address format
introduced in Internationalized Email Headers [RFC5335] is a new
address type. The syntax for the new address type in the context of
status notifications is specified at the end of this section.
An SMTP [RFC2821] server that advertises both the UTF8SMTP extension
[RFC5336] and the DSN extension [RFC3461] MUST accept a UTF-8 address
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