{"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":["ASCII","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\r\nparticular, existing protocols place no restriction on what a sending\r\nhost can use as the reverse-path of a message or the domain given on\r\nthe SMTP HELO\/EHLO commands.  This document describes version 1 of\r\nthe ender Policy Framework (SPF) protocol, whereby a domain may\r\nexplicitly authorize the hosts that are allowed to use its domain\r\nname, 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"}