"In parts 1 and 2 of our thrilling 'Building an
Anti-Virus/Anti-Spam Gateway' series, we covered the basic steps
for setting up SpamAssassin and Clam Anti-virus with Postfix. This
installment is devoted to testing and tweaking, and creating
whitelists in Amavisd-new. Whitelists are essential when you set up
any kind of spam filtering: It's the best way to make sure your
wanted mail gets through..."
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