10736157-a-cartoon-rabbit-with-an-angry-expressionIf you are anything like me you would rather not have anything to do with Sendmail or Postfix, however unfortunately it can be required learning in some circles. That being said this is my second postfix post in what I call my "Postfix: Nasty!" series. The first one can be read here, and I will be the first to admit that its not very good. However I chock this up to the fact that I really don't know much about Postfix at all and I'm writing these posts as part of the process of figuring out how to do what with Postfix. Specifically this post outlines and defines the standard roles that a postfix server can serve. Below are three common roles and their characteristics. You should get to know each of these and how to configure them.