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https://github.com/vdukhovni/postfix

Postfix MTA by Wietse Venema
https://github.com/vdukhovni/postfix

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Postfix MTA by Wietse Venema

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README 

        
Purpose of this document

========================



This document provides a road map of the Postfix mail system source

code distribution.  I suggest that you



- take a few minutes to read this file,



- review the RELEASE_NOTES file for incompatible changes,



- and then proceed with the INSTALL instructions.



Introduction

============



This is the public release of the Postfix mail system. Thank you

for your interest in this project. Send me a postcard if you like

it. My postal address is below.



You must read the LICENSE file, if you didn't do so already. A copy

of the LICENSE must be distributed with every original, modified,

complete, source, or binary copy of this software or parts thereof.

I suggest that you keep a copy of the file in /etc/postfix/LICENSE.



Purpose of the Postfix mail system

==================================



Postfix aims to be an alternative to the widely-used sendmail

program.



Although IBM supported the Postfix development, it abstains from

control over its evolution. The goal is to have Postfix installed

on as many systems as possible. To this end, the software is given

away with no strings attached to it, so that it can evolve with

input from and under control by its users.



In other words, IBM releases Postfix only once. I will be around

to guide its development for a limited time.



On-line resources devoted to the Postfix mail system

====================================================



Web sites:



    http://www.postfix.org/		current release information



Mail addresses (PLEASE send questions to the mailing list)



    [email protected]		Postfix users mailing list



In order to subscribe to the mailing list, see http://www.postfix.org/.



Acknowledgments

===============



This release could not have happened without the input from a team

of competent alpha testers. Their names appear in numerous places

in the HISTORY file. I appreciate the input from my colleagues at

the IBM Global Security Analysis Laboratory:  Paul Karger, Dave

Safford, Douglas Schales, and Leendert van Doorn.  I also appreciate

the support by Charles Palmer under whose leadership I began this

project, and who had the privilege to name the software, twice.



Postcards

=========



If you wish to express your appreciation for the Postfix software,

you are welcome to send a postcard to:



	Wietse Venema

	Google

	111 8th Avenue, 4th floor

	New York, NY 10011

	USA



Roadmap of the Postfix source distribution

==========================================



The RELEASE_NOTES file describes new features, and lists incompatible

changes with respect to previous Postfix versions.



The INSTALL file provides a step-by-step guide for building and

installing Postfix on many popular UNIX platforms.



The COMPATIBILITY file lists features that Postfix does or does

not yet implement, and how well it works with other software.



The HISTORY file gives a detailed log of changes to the software.



Point your browser at html/index.html for Postfix documentation

and for hyperlinked versions of Postfix manual pages.  Expect

to see updated versions on-line at http://www.postfix.org/



Point your MANPATH environment variable at the `man' directory (use

an absolute path) for UNIX-style on-line manual pages.  These pages

are also available through the HTML interface, which allows you to

navigate faster.



The PORTING file discusses how to go about porting Postfix to other

UNIX platforms.



Documentation:



    README_FILES/	Instructions for specific Postfix features

    html/		HTML format

    man/		UNIX on-line manual page format



Example files:



    conf/		configuration files, run-time scripts

    examples/		chroot environments, virtual domains



Library routines:



    src/dns/		DNS client library

    src/global/		Postfix-specific support routines

    src/milter/		Postfix Milter (mail filter) client

    src/tls/		TLS client and server support

    src/util/		General-purpose support routines

    src/xsasl/		SASL plug-in API



Command-line utilities:



    src/postalias/	Alias database management

    src/postcat/	List Postfix queue file

    src/postconf/	Configuration utility

    src/postdrop/	Postfix mail submission program

    src/postfix/	Postfix administrative interface

    src/postkick/	Postfix IPC for shell scripts

    src/postlock/	Postfix locking for shell scripts

    src/postlog/	Postfix logging for shell scripts

    src/postmap/	Postfix lookup table management

    src/postmulti/	Postfix multi-instance manager

    src/postqueue/	Postfix queue control program

    src/postsuper/	Postfix house keeping program

    src/sendmail/	Sendmail compatibility interface



Postfix daemons:



    src/anvil/		Connection count/rate limiter

    src/bounce/		Bounce or defer mail

    src/cleanup/	Canonicalize and enqueue mail

    src/discard/	Trivial discard mailer

    src/dnsblog/	DNS agent for postscreen

    src/error/		Trivial error mailer

    src/flush/		Support for ETRN, sendmail -qI, sendmail -qR

    src/local/		Local delivery

    src/master/		Postfix resident superserver

    src/oqmgr/		Old queue manager

    src/pickup/		Local pickup

    src/pipe/		Pipe delivery

    src/postlogd/	Syslog alternative, logs to file or stdout

    src/postscreen/	Zombie blocker

    src/proxymap/	Table lookup proxy agent

    src/qmgr/		Queue manager

    src/qmqpd/		QMQPD server

    src/scache/		Postfix SMTP session cache

    src/showq/		List Postfix queue status

    src/smtp/		SMTP and LMTP client

    src/smtpd/		SMTP server

    src/spawn/		Run non-Postfix server

    src/tlsmgr/		TLS session keys and random pool

    src/tlsproxy/	TLS proxy for postscreen and outbound connection reuse

    src/trivial-rewrite/ Address rewriting and resolving

    src/verify/		address verification service

    src/virtual/	virtual mailbox-only delivery agent



Test programs:



    src/fsstone/	Measure file system overhead

    src/posttls-finger/	Postfix SMTP/LMTP TLS probe utility

    src/smtpstone/	SMTP and QMQP server torture test



Miscellaneous:



    auxiliary/		Auxiliary software etc.

    bin/		Postfix command executables

    conf/		Configuration files, run-time scripts

    include/		Include files

    implementation-notes/ Background information

    lib/		Object libraries

    libexec/		Postfix daemon executables

    mantools/		Documentation utilities

    proto/		Documentation source