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Deliver By SMTP Service Extension (RFC2852)

IP.com Disclosure Number: IPCOM000003451D
Original Publication Date: 2000-Jun-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 10 page(s) / 27K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Newman: AUTHOR

Abstract

This memo defines a mechanism whereby a SMTP client can request, when transmitting a message to a SMTP server, that the server deliver the message within a prescribed period of time. A client making such a request also specifies the message handling which is to occur if the message cannot be delivered within the specified time period: either the message is to be returned as undeliverable with no further processing, or a "delayed" delivery status notification (DSN) [6] is to be issued.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 11% of the total text.

Network Working Group D. Newman

Request for Comments: 2852 Sun Microsystems

Updates: 1894 June 2000

Category: Standards Track

Deliver By SMTP Service Extension

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 (2000). All Rights Reserved.

Abstract

This memo defines a mechanism whereby a SMTP client can request, when

transmitting a message to a SMTP server, that the server deliver the

message within a prescribed period of time. A client making such a

request also specifies the message handling which is to occur if the

message cannot be delivered within the specified time period: either

the message is to be returned as undeliverable with no further

processing, or a "delayed" delivery status notification (DSN) [6] is

to be issued.

This extension should not be viewed as a vehicle for requesting

"priority" processing. A receiving SMTP server may assign whatever

processing priority it wishes to a message transmitted with a Deliver

By request. A Deliver By request serves to express a message's

urgency and to provide an additional degree of determinancy in its

processing. An indication of an urgent message's status within a

given time period may be requested and will be honored. Moreover,

the message may be withdrawn if not delivered within that time

period.

A typical usage of this mechanism is to prevent delivery of a message

beyond some future time of significance to the sender or recipient

but not known by the MTAs handling the message. For instance, the

sender may know that the message will be delivered as a page but does

not consider the message to be sufficiently important as to warrant

paging the recipient after business hours. In that case, the message

could be marked such that delivery attempts are not made beyond

17:00. Another common usage arises when a sender wishes to be

alerted to delivery delays. In this case, the sender can mark a

message such that if it is not delivered within, say, 30 minutes, a

"delayed" DSN is generated but delivery attempts are nonetheless

continued. In this case the sender has been allowed to express a

preference for when they would like to learn of delivery problems.

1. Definitions

Throughout this document, the term "deliver" is taken to mean the act

of transmitting a message to its "final" destination by a message

transport agent (MTA). Usually, but not always, this means storing

or otherwise handing off the message to the recipient's mailb...