NewsForge: A Closer Look at SPF

” Several mechanisms have emerged which attempt to thwart the
proliferation of an ever increasing volume of spam. The SPF
(‘Sender Policy Framework’) is a framework designed prior to the
SenderID initiative, which is being considered as a standard for
email authentication by major players like Sendmail, Microsoft and
the IETF, among others. But the Apache Software Foundation and the
Debian Project have both chosen not to implement SenderID because
of its restrictive IP licensing. In this article we will take a
close look at SPF: how it works and how it is deployed.

“The exchange for processing an email takes place between two
SMTP servers, where the originating party acts as a broker for
sending a message which is later processed for delivery by the
receiving server. However, this process assumes the originating
party is worthy of trust…”

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