{
  "draft": "draft-schlitt-spf-classic-02",
  "doc_id": "RFC4408",
  "title": "Sender Policy Framework (SPF) for Authorizing Use of Domains in E-Mail, Version 1",
  "authors": [
    "M. Wong",
    "W. Schlitt"
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "48",
  "pub_status": "EXPERIMENTAL",
  "status": "EXPERIMENTAL",
  "source": "IETF - NON WORKING GROUP",
  "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.",
  "pub_date": "April 2006",
  "keywords": [
    "spoofing",
    "spf"
  ],
  "obsoletes": [],
  "obsoleted_by": [
    "RFC7208"
  ],
  "updates": [],
  "updated_by": [
    "RFC6652"
  ],
  "see_also": [],
  "doi": "10.17487/RFC4408",
  "errata_url": "https://www.rfc-editor.org/errata/rfc4408"
}