Postfix

Postfix is a free software / open source mail transfer agent (MTA), a computer program for the routing and delivery of email. It is intended as a fast, easy-to-administer, and secure alternative to the widely-used Sendmail MTA.

Base configuration

The main.cf file stores site specific Postfix configuration parameters while master.cf defines daemon processes. The Postfix Basic Configuration tutorial covers the core settings that each site needs to consider.

Configuration settings for a few common environments are discussed in Postfix Standard Configuration Examples.

Address rewriting and mail routing are covered in Postfix Address Rewriting. The full documentation collection is at Postfix Documentation.

Examples

postalias /etc/postfix/aliases

Then create /etc/postfix/aliases.db

postfix reload
postconf -n
postfix check

Utilities

postalias

Postfix alias database maintenance

postcat

show Postfix queue file contents

postconf

Postfix configuration utility

postconf

Postfix configuration parameters

postdrop

Postfix mail posting utility

postfinger

Postfix configuration extraction utility

postkick

kick a Postfix service

postlock

lock mail folder and execute command

postlog

Postfix-compatible logging utility

postmap

Postfix lookup table management

postqueue

Postfix queue control

postsuper

Postfix superintendent

External links

• Official website
• Postfix Wiki
• Postfix Discussion (mailing list archive)
• A high performance Postfix policy delegation server
• Postfix introduction and analysis for secure environments
• wikipedia:Postfix (software)