metasystema.org
ObsoletedEXPERIMENTALIETF stream

RFC 4408: Sender Policy Framework (SPF) for Authorizing Use of Domains in E-Mail, Version 1

This RFC has been replaced. Do not implement against it for new work — it was formally obsoleted by RFC 7208.

Current version: RFC 7208 — Sender Policy Framework (SPF) for Authorizing Use of Domains in Email, Version 1

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

E-mail on the Internet can be forged in a number of ways. In particular, existing protocols place no restriction on what a sending host can use as the reverse-path of a message or the domain given on the SMTP HELO/EHLO commands. This document describes version 1 of the ender Policy Framework (SPF) protocol, whereby a domain may explicitly authorize the hosts that are allowed to use its domain name, and a receiving host may check such authorization. This memo defines an Experimental Protocol for the Internet community.

Document record

Document ID
RFC4408
Published
April 2006
Authors
M. Wong; W. Schlitt
Status
EXPERIMENTAL
Stream
IETF
Area
—
Pages
48
Also known as
—
Obsoleted by:
RFC 7208
Updated by:
RFC 6652

Topics

Referenced by

2 later RFCs formally update or obsolete part of this document.

Related documents

Ranked automatically by shared keywords, IETF area and stream — not by editorial selection.

Also filed under

About this page

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.

Data sources · Editorial policy · Report a correction · What is an RFC?

canonical URL: /rfc/4408-sender-policy-framework-spf-for-authorizing-use-of-domains-in-e-mail-version-1