Sender Policy Framework (SPF) for Authorizing Use of Domains in Email, Version 1
draft-ietf-spfbis-4408bis-15

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Document Type Active Internet-Draft (spfbis WG)
Last updated 2013-05-23
Replaces draft-kitterman-4408bis
Stream IETF
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Stream WG state Waiting for WG Chair Go-Ahead May 2013
Revised I-D Needed - Issue raised by WG
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Network Working Group                                       S. Kitterman
Internet-Draft                              Kitterman Technical Services
Obsoletes: 4408 (if approved)                               May 23, 2013
Intended status: Standards Track
Expires: November 24, 2013

 Sender Policy Framework (SPF) for Authorizing Use of Domains in Email,
                               Version 1
                      draft-ietf-spfbis-4408bis-15

Abstract

   Email 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 "MAIL FROM" of a message or the domain given on
   the SMTP HELO/EHLO commands.  This document describes version 1 of
   the Sender Policy Framework (SPF) protocol, whereby a ADMDs
   (ADministrative Management Domains) can explicitly authorize the
   hosts that are allowed to use its domain names, and a receiving host
   can check such authorization.

   This document obsoletes RFC4408.

Status of this Memo

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Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents

Kitterman               Expires November 24, 2013               [Page 1]
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Kitterman               Expires November 24, 2013               [Page 2]
Internet-Draft        Sender Policy Framework (SPF)             May 2013

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  6
     1.1.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  6
       1.1.1.  Keywords . . . . . . . . . . . . . . . . . . . . . . .  6
       1.1.2.  Imported Definitions . . . . . . . . . . . . . . . . .  6
       1.1.3.  MAIL FROM Definition . . . . . . . . . . . . . . . . .  7
       1.1.4.  HELO Definition  . . . . . . . . . . . . . . . . . . .  7
     1.2.  check_host() . . . . . . . . . . . . . . . . . . . . . . .  7
   2.  Operational Overview . . . . . . . . . . . . . . . . . . . . .  8
     2.1.  The "HELO" Identity  . . . . . . . . . . . . . . . . . . .  8
     2.2.  The "MAIL FROM" Identity . . . . . . . . . . . . . . . . .  8
     2.3.  Publishing Authorization . . . . . . . . . . . . . . . . .  8
     2.4.  Checking Authorization . . . . . . . . . . . . . . . . . .  9
     2.5.  Location of Checks . . . . . . . . . . . . . . . . . . . . 10
     2.6.  Results of Evaluation  . . . . . . . . . . . . . . . . . . 10
       2.6.1.  None . . . . . . . . . . . . . . . . . . . . . . . . . 11
       2.6.2.  Neutral  . . . . . . . . . . . . . . . . . . . . . . . 11
       2.6.3.  Pass . . . . . . . . . . . . . . . . . . . . . . . . . 11
       2.6.4.  Fail . . . . . . . . . . . . . . . . . . . . . . . . . 11
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