Mac OS® X Tiger™ Unleashed

Fine-tuning a Postfix Configuration

All the Postfix configuration we'll look at is done in the /etc/postfix/main.cf, and options within main.cf consist of lines in the form

						<setting>=<value>[,<value>]
					

where <setting> is one of the Postfix directives, and <value> is a simple setting (such as a hostname, timeout value, and so on), a path to a hash file, such as hash:/etc/aliases, or, in the case of Mac OS X, a NetInfo path, such as netinfo:/aliases. In some cases, lists of values can be used, separated by commas.

A hash file is a binary lookup table that holds key and value pairs. There are two specific types of hash files you'll be interested in with Postfix: map files and alias files, generated with the postmap or postalias command, respectively. ...