RFC 2530 (rfc2530) - Page 1 of 5
Indicating Supported Media Features Using Extensions to DSN and MDN
Alternative Format: Original Text Document
Network Working Group D. Wing
Request for Comments: 2530 Cisco Systems
Category: Standards Track March 1999
Indicating Supported Media Features Using
Extensions to DSN and MDN
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (1999). All Rights Reserved.
1. Abstract
There is a need in Internet mail and Internet fax for a recipient to
indicate the media features it supports so that messages can be
generated by senders without exceeding the recipient's abilities.
This memo describes a format for generating Message Disposition
Notifications [RFC 2298] and Delivery Status Notifications [RFC 1894]
which contain such information. This information can be used by
senders to avoid exceeding the recipient's capabilities when sending
subsequent messages.
2. Introduction
The extensions described in this document can be used in Message
Disposition Notifications [RFC 2298] or Delivery Status Notifications
[RFC 1894], as appropriate for the implementation.
Note that both DSNs and MDNs have drawbacks: DSNs are not available
between all senders and receivers, and MDNs require the receiver to
disclose message disposition information (or, if using the "denied"
disposition-type, the time the disposition notification was
generated).
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 [RFC 2119].
Wing Standards Track