The official Postfix web site (http://www.postfix.org/) has a download link that displays a list of mirrors from which you can get the software. You should select the mirror that is closest to you. Get the package you want by selecting the "Source code" link under either the Official or Experimental release (see Chapter 1). The examples here assume that you have downloaded a file called postfix-2.0.10.tar.gz. If the file you download is different, change the filename accordingly in the commands in the examples.
Introduction
Prerequisites
Postfix Architecture
General Configuration and Administration
Queue Management
Email and DNS
Local Delivery and POP/IMAP
Hosting Multiple Domains
Mail Relaying
Mailing Lists
Blocking Unsolicited Bulk Email
SASL Authentication
Transport Layer Security
Content Filtering
External Databases
Appendix A. Configuration Parameters
Appendix B. Postfix Commands
Appendix C. Compiling and Installing Postfix
Appendix D. Frequently Asked Questions