[Exim] Is there a good reference of complete Configs?

    I'm struggling with getting AUTH working without actually understanding
all of what it is I need to do.  Is there a set of configs that are posted
somewhere that I can look at to see how to do different forms of AUTH.  I'm
replacing an Exchange server that was doing Auth for relay control with a
Linux Box and Exim.  Any help that you can send my way would be great.