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ObsoletedPROPOSED STANDARDIETF stream

RFC 1425: SMTP Service Extensions

This RFC has been replaced. Do not implement against it for new work — it was formally obsoleted by RFC 1651.

Current document in this lineage: RFC 5321 — Simple Mail Transfer Protocol

In plain English — editorial summary, not part of the RFC

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. [STANDARDS-TRACK]

Document record

Document ID
RFC1425
Published
February 1993
Authors
J. Klensin; N. Freed; M. Rose; E. Stefferud; D. Crocker
Status
PROPOSED STANDARD
Stream
IETF
Area
app
Pages
10
Also known as
—
Obsoleted by:
RFC 1651

Topics

Standards lineage

This document is one revision in a chain of 10 RFCs, each formally replacing the one before it.

  1. RFC 772 (1980)
  2. RFC 780 (1981)
  3. RFC 788 (1981)
  4. RFC 821 (1982)
  5. RFC 974 (1986)
  6. RFC 1425 (1993)
  7. RFC 1651 (1994)
  8. RFC 1869 (1995)
  9. RFC 2821 (2001)
  10. RFC 5321 (2008) ✓

Read the full history of Simple Mail Transfer Protocol →

Referenced by

One later RFC formally updates or obsoletes part of this document.

Related documents

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

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canonical URL: /rfc/1425-smtp-service-extensions