This website has information about the Postfix source code distribution. Built from source code, Postfix can run on UNIX-like systems including AIX, BSD, HP-UX, Linux, MacOS X, Solaris, …

This document covers basic Postfix configuration. Information about how to configure Postfix for specific applications such as mailhub, firewall or dial-up client can be found in the …

The Postfix SMTP server receives mail from the network and is exposed to the big bad world of junk email and viruses. This document introduces the built-in and external methods that …

Although Postfix currently has no address rewriting language, it can do surprisingly powerful address manipulation via table lookup. Postfix typically uses lookup tables with fixed strings to …

With Postfix address verification turned on, normal mail will suffer only a short delay of up to 6 seconds while an address is being verified for the first time. Once an address status is known, …

How Postfix TLS support works The diagram below shows the main elements of the Postfix TLS architecture and their relationships. Colored boxes with numbered names represent Postfix …

The following documents describe how to build the list of valid Exchange recipients for a Postfix 2.x "front end" MTA, so that you don't clog the Postfix mail queue with undeliverable MAILER …

In particular, do not proceed here if you don't already have Postfix working for local mail submission and for local mail delivery. The first part of this document presents standard …

Postfix logging to file or stdout Backwards-Compatibility Support Replacements for Deprecated Features Installation from source code Problem solving Bottleneck analysis Stress-dependent …

The Postfix architecture overview ends with a summary of command-line utilities for day-to-day use of the Postfix mail system. Besides the Sendmail-compatible sendmail (1), mailq (1), and …