Applicability

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 Administrative Management Domains (ADMDs) can explicitly authorize the hosts that are allowed to use their domain names, and a receiving host can check such authorization.

Responsible Party

Status

UUID

41f632c2-40e8-4da4-a052-a46fcc41a43f