Built from source code, Postfix can run on UNIX-like systems including AIX, BSD, HP-UX, Linux, MacOS X, Solaris, and more. Postfix is also distributed as ready-to-run code by operating system vendors, appliance vendors, and other providers.

Postfix logging to file or stdout ; Backwards-Compatibility Support; Replacements for Deprecated Features; Installation from source code . Problem solving . Bottleneck analysis ; Stress-dependent configuration ; Performance tuning ; Debugging strategies . Content inspection . Content inspection overview ; Stopping backscatter mail Built-in ...

By default, Postfix configuration files are in /etc/postfix. The two most important files are main.cf and master.cf ; these files must be owned by root. Giving someone else write permission to main.cf or master.cf (or to their parent directories) means giving root privileges to that person.

Postfix runs (or has run) on AIX, BSD, HP-UX, IRIX, LINUX, MacOS X, Solaris, Tru64 UNIX, and other UNIX systems. It requires ANSI C, a POSIX.1 library, and BSD sockets. In addition, Postfix requires that the file system satisfies a number of requirements that …

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 control what SMTP mail Postfix will accept, what mistakes to avoid, and how to test your configuration.

Execute the command "postmap /etc/postfix/virtual" after editing the file. Running Postfix behind a firewall. The simplest way to set up Postfix on a host behind a firewalled network is to send all mail to a gateway host, and to let that mail host take care of internal and external forwarding.

Each Postfix manual page is numbered after a section of the UNIX manual: examples are mailq(1) or access(5). Unfortunately, there is no single universal method to organize manual pages; each UNIX flavor appears to be different.

Postfix can be built with Postfix dynamically-linked libraries (files typically named libpostfix-*.so). Postfix dynamically-linked libraries add minor run-time overhead and result in significantly-smaller Postfix executable files.

With Postfix 2.6 and later, this environment variable forces the postfix(1) command to operate on the specified Postfix instance only. This behavior is inherited by postfix(1) commands that run as a descendant of the current process.

Postfix 3.6 - 3.9 were updated earlier this week; after that, Postfix 3.6 will no longer be updated. The main changes are below. See the RELEASE_NOTES file for further details.