Summary:

Postfix, the open source mail transfer agent, is fast, easy to administer, and--perhaps best of all--secure. Highly respected for its efficiency and design, Postfix features a simple interface to a secure design. Its straightforward administration is managed with only two configuration files, eliminating much of the complexity that sendmail is known for, and it employs multiple layers of defense in its security to protect against attackers. In fact, most system administrators agree that Postfix has only one shortcoming: its existing documentation is terse and assumes a level technical competency that most sys adminssysadmins aren't required to know. Postfix: The Definitive Guide changes all this. This new book offers both a tutorial and complete reference for Postfix that system administrators of any level can tackle with ease. Gentler and more accessible in its approach than the official documentation, Postfix: The Definitive Guide provides a single, comprehensive source of documentation on this open source option. The book's tutorial style will guide newcomers through the intricacies of Postfix, while also serving as a reference for seasoned users to thumb through whenever questions or problems arise. Altogether, this book makes the perfect resource for administrators who want to master Postfix or switch to it from other mail transfer agents. Wietse Venema, creator of Postfix, writes in his foreword to the book, "One of the main goals of Postfix is wide adoption. Building Postfix was only the first challenge on the way to that goal. The second challenge was to make the software accessible…Truth to be said, I would not expect to see wide adoption of Postfix without a book that introduces the concepts behind the system, and that gives examples of how to get common tasks done. I was happy to leave the writing of this book to Kyle Dent." Postfix: The Definitive Guide covers the following topics and more: -Basic Unix® and email concepts
-Postfix architecture
-General configuration and administration
-Queue management
-Email and DNS
-Mail relaying
-Blocking spam
-Transport layer security
-External databases From compiling and installing Postfix to troubleshooting, Postfix: The Definitive Guide offers sys adminssysadmins and anyone who deals with Postfix an all-in-one, comprehensive tutorial and reference to this MTA.