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.
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