RFC 2530 (rfc2530) - Page 1 of 5

Indicating Supported Media Features Using Extensions to DSN and MDN

Alternative Format: Original Text Document
Next >
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
Next >