I agree that greylisting was the cat's meow back then. I setup a VM running CentOS with Postfix and Postgrey as a MTA for our "work" email server and the resul

I agree that greylisting was the cat's meow back then. I setup a VM running CentOS with Postfix and Postgrey as a MTA for our "work" email server and the result was a massive reduction in spam.