{
  "number": 4408,
  "title": "Sender Policy Framework (SPF) for Authorizing Use of Domains in E-Mail, Version 1",
  "authors": [
    "M. Wong",
    "W. Schlitt"
  ],
  "published": "2006-04",
  "status": "Experimental",
  "stream": "IETF",
  "pages": 48,
  "formats": [
    "TXT",
    "HTML"
  ],
  "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.",
  "keywords": [
    "spoofing",
    "spf"
  ],
  "draft": "draft-schlitt-spf-classic-02",
  "doi": "10.17487/RFC4408",
  "errata_url": "https://www.rfc-editor.org/errata/rfc4408",
  "obsoleted_by": [
    "RFC7208"
  ],
  "updated_by": [
    "RFC6652"
  ],
  "urls": {
    "html": "https://rfc.dk/rfc4408/",
    "text": "https://rfc.dk/rfc4408.txt",
    "rfc_editor": "https://www.rfc-editor.org/rfc/rfc4408",
    "datatracker": "https://datatracker.ietf.org/doc/rfc4408/"
  },
  "text_modified": "2006-04-27T22:48:10Z"
}