How-to Implement SPF in Postfix

“This tutorial shows how to implement SPF in a Postfix 2.x installation. The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery. There are lots of SPF extensions and patches available for Postfix, but most require that you recompile Postfix. Therefore we will install the postfix-policyd-spf-perl package from which is a Perl package and can be implemented in existing Postfix installations (no Postfix compilation required).”


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