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pageoneresults - 12:22 am on Sep 9, 2004 (gmt 0)
SPF = Sender Policy Framework This is one that everyone should pay attention to. Come 2004 October, there will be many who will be using an SPF checking utility with email. If you do not have an SPF Record, chances are your email will be flagged as spam at the recipients end. Each domain will be required to have an SPF Record.
SPF Records [spf.pobox.com]