Browse Prior Art Database

SMTP Service Extensions (RFC1651)

IP.com Disclosure Number: IPCOM000002487D
Original Publication Date: 1994-Jul-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 9 page(s) / 21K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Klensin: AUTHOR [+5]

Abstract

This memo defines a framework for extending the SMTP service by defining a means whereby a server SMTP can inform a client SMTP as to the service extensions it supports. Standard extensions to the SMTP service are registered with the IANA. This framework does not require modification of existing SMTP clients or servers unless the features of the service extensions are to be requested or provided.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 13% of the total text.

Network Working Group J. Klensin, WG Chair

Request for Comments: 1651 MCI

Obsoletes: 1425 N. Freed, Editor

Category: Standards Track Innosoft

M. Rose

Dover Beach Consulting, Inc.

E. Stefferud

Network Management Associates, Inc.

D. Crocker

Silicon Graphics, Inc.

July 1994

SMTP Service Extensions

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.

1. Abstract

This memo defines a framework for extending the SMTP service by

defining a means whereby a server SMTP can inform a client SMTP as to

the service extensions it supports. Standard extensions to the SMTP

service are registered with the IANA. This framework does not

require modification of existing SMTP clients or servers unless the

features of the service extensions are to be requested or provided.

2. Introduction

The Simple Mail Transfer Protocol (SMTP) [1] has provided a stable,

effective basis for the relay function of message transfer agents.

Although a decade old, SMTP has proven remarkably resilient.

Nevertheless, the need for a number of protocol extensions has become

evident. Rather than describing these extensions as separate and

haphazard entities, this document enhances SMTP in a straightforward

fashion that provides a framework in which all future extensions can

be built in a single consistent way.

3. Framework for SMTP Extensions

For the purpose of service extensions to SMTP, SMTP relays a mail

object containing an envelope and a content.

(1) The SMTP envelope is straightforward, and is sent as a

series of SMTP protocol units: it consists of an

originator address (to which error reports should be

directed); a delivery mode (e.g., deliver to recipient

mailboxes); and, one or more recipient addresses.

(2) The SMTP content is sent in the SMTP DATA pr...