Before proceeding with this tutorial, and at the risk of possibly overstating what is obvious to some, I want to make three things clear:
Sender Policy Framework

Update! RPMs and Yum now available. I build and maintain the RPM packages of OpenDKIM for RHEL/CentOS and Fedora, which are available with Yum. For a much quicker and easier way to install OpenDKIM, read this. Of course, if you still prefer to go old-skool and compile your own binaries […]