RFC 4408

"Sender Policy Framework (SPF) for Authorizing Use of Domains in E-Mail, Version 1", April 2006

Canonical URL:

http://www.rfc-editor.org/rfc/rfc4408.txt
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Status:

EXPERIMENTAL

Authors:

M. Wong
W. Schlitt

Stream:

IETF

Source:

NON WORKING GROUP

Please refer here for any errata for this document. To submit a new errata report, go to the main errata page.

Abstract

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.

For the definition of Stream, see RFC 4844.