This book will offer broad coverage to instruct both the large ISP and the small business network administrator on how to install and configure a full featured Internet email system with a minimum amount of expense. This is possible using the Linux Operating System which supplies all of the necessary server software, the Postfix email software package, and Public Domain client email software on the client PC's. This book also includes educational information that can be used by network administrators in using Postfix to connect an office email server to an ISP. The Postfix email software package is in widely used on the Internet without any books documenting how to install, configure, and operate the email server. This book will provide all the information needed to run Postfix effectively and efficiently.