Home | Sitemap | Recent Changes | Login

SPF Logo

Sender Policy Framework


The final SPFv1 specification: RFC 4408

Formats: On-site HTML | HTML | Plain Text | XML Source

At IETF: HTML | Plain Text

This is the final specification for the v=spf1 record syntax and semantics. It is based on the last draft series, draft-schlitt-spf-classic, and was published by the Internet Engineering Task Force (IETF) on 2006-04-28.

The errata will eventually be submitted to the relevant IETF area director for verification.

Historical editions of the specification

SPF has a long history reaching back to mid-2003, when it was created as a spin-off from Gordon Fecyk's then-current Designated Mailers Protocol (DMP) draft. SPF was also strongly influenced by Hadmut Danisch's Reverse MX proposal.

In December 2003, the first stable SPF draft was released. Since then, a number of editions have been released, differing mostly in details, and leading up to the final specification published as RFC 4408.

RFC 4408 -- final SPFv1 specification draft-schlitt-spf-classic-02 draft-schlitt-spf-classic-01 draft-schlitt-spf-classic-00 draft-lentczner-spf-00 (MARID) draft-mengwong-spf-01.200406 draft-mengwong-spf-01 draft-mengwong-spf-00 draft-mengwong-spf.02.9.4 -- first stable SPF draft, mostly compatible with today

Edit text of this page | View other revisions
Last edited 2009-07-17 15:43 (UTC) by Julian Mehnle (diff)