"This guide describes how to set up a full email solution in Debian Linux (all code is from Debian Etch). I was asked to design a secure, scalable, portable solution for a small company. While the guide references many 'servers', the company only had 4 physical machines, Xen was used to virtualize the entire solution. That particular aspect of the system is not discussed in this guide, although I will try to get it into the next revision.
"Just a note on the server names used below: If it doesn't need to be accessed by the internet, don't let it be. Domain names ending in internal.example.com are internal NIC/IP Addresses... there is no way to access them directly from the internet, nor should there be..."
