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+#++
+# NAME
+# master 5
+# SUMMARY
+# Postfix master process configuration file format
+# DESCRIPTION
+# The Postfix mail system is implemented by small number of
+# (mostly) client commands that are invoked by users, and by
+# a larger number of services that run in the background.
+#
+# Postfix services are implemented by daemon processes. These
+# run in the background under control of the \fBmaster\fR(8)
+# process. The master.cf configuration file defines how a
+# client program connects to a service, and what daemon
+# program runs when a service is requested. Most daemon
+# processes are short-lived and terminate voluntarily after
+# serving \fBmax_use\fR clients, or after inactivity for
+# \fBmax_idle\fR or more units of time.
+#
+# All daemons specified here must speak a Postfix-internal
+# protocol. In order to execute non-Postfix software use the
+# \fBlocal\fR(8), \fBpipe\fR(8) or \fBspawn\fR(8) services, or
+# run the server under control by \fBinetd\fR(8) or equivalent.
+# .PP
+# After changing master.cf you must execute "\fBpostfix reload\fR"
+# to reload the configuration.
+# SYNTAX
+# .ad
+# .fi
+# The general format of the master.cf file is as follows:
+# .IP \(bu
+# Empty lines and whitespace-only lines are ignored, as are
+# lines whose first non-whitespace character is a `#'.
+# .IP \(bu
+# A logical line starts with non-whitespace text. A line that
+# starts with whitespace continues a logical line.
+# .IP \(bu
+# Each logical line defines a single Postfix service.
+# Each service is identified by its name and type as described
+# below. When multiple lines specify the same service name
+# and type, only the last one is remembered. Otherwise, the
+# order of master.cf service definitions does not matter.
+# .PP
+# Each logical line consists of eight fields separated by
+# whitespace. These are described below in the order as they
+# appear in the master.cf file.
+#
+# Where applicable a field of "-" requests that the built-in
+# default value be used. For boolean fields specify "y" or
+# "n" to override the default value.
+# .IP "\fBService name\fR"
+# The service name syntax depends on the service type as
+# described next.
+# .IP "\fBService type\fR"
+# Specify one of the following service types:
+# .RS
+# .IP \fBinet\fR
+# The service listens on a TCP/IP socket and is accessible
+# via the network.
+#
+# The service name is specified as \fIhost:port\fR, denoting
+# the host and port on which new connections should be
+# accepted. The host part (and colon) may be omitted. Either
+# host or port may be given in symbolic form (see \fBhosts\fR(5) or
+# \fBservices\fR(5)) or in numeric form (IP address or port number).
+# Host information may be enclosed inside "[]"; this form
+# is necessary only with IPv6 addresses.
+# .sp
+# Examples: a service named \fB127.0.0.1:smtp\fR or \fB::1:smtp\fR
+# receives
+# mail via the loopback interface only; and a service named
+# \fB10025\fR accepts connections on TCP port 10025 via
+# all interfaces configured with the \fBinet_interfaces\fR
+# parameter.
+#
+# .sp
+# Note: with Postfix version 2.2 and later specify
+# "\fBinet_interfaces = loopback-only\fR" in main.cf, instead
+# of hard-coding loopback IP address information in master.cf
+# or in main.cf.
+# .IP \fBunix\fR
+# The service listens on a UNIX-domain stream socket and is
+# accessible for local clients only.
+#
+# The service name is a pathname relative to the Postfix
+# queue directory (pathname controlled with the \fBqueue_directory\fR
+# configuration parameter in main.cf).
+# .sp
+# On Solaris 8 and earlier systems the \fBunix\fR type is
+# implemented with streams sockets.
+# .IP \fBunix-dgram\fR
+# The service listens on a UNIX-domain datagram socket and is
+# accessible for local clients only.
+#
+# The service name is a pathname relative to the Postfix
+# queue directory (pathname controlled with the \fBqueue_directory\fR
+# configuration parameter in main.cf).
+# .IP "\fBfifo\fR (obsolete)"
+# The service listens on a FIFO (named pipe) and is accessible
+# for local clients only.
+#
+# The service name is a pathname relative to the Postfix
+# queue directory (pathname controlled with the \fBqueue_directory\fR
+# configuration parameter in main.cf).
+# .IP \fBpass\fR
+# The service listens on a UNIX-domain stream socket, and is
+# accessible to local clients only. It receives one open
+# connection (file descriptor passing) per connection request.
+#
+# The service name is a pathname relative to the Postfix
+# queue directory (pathname controlled with the \fBqueue_directory\fR
+# configuration parameter in main.cf).
+# .sp
+# On Solaris 8 and earlier systems the \fBpass\fR type is
+# implemented with streams sockets.
+#
+# This feature is available as of Postfix version 2.5.
+# .RE
+# .IP "\fBPrivate (default: y)\fR"
+# Whether or not access is restricted to the mail system.
+# Internet (type \fBinet\fR) services can't be private.
+# .IP "\fBUnprivileged (default: y)\fR"
+# Whether the service runs with root privileges or as the
+# owner of the Postfix system (the owner name is controlled
+# by the \fBmail_owner\fR configuration variable in the
+# main.cf file).
+# .sp
+# The \fBlocal\fR(8), \fBpipe\fR(8), \fBspawn\fR(8), and
+# \fBvirtual\fR(8) daemons require privileges.
+# .IP "\fBChroot (default: Postfix >= 3.0: n, Postfix <3.0: y)\fR"
+# Whether or not the service runs chrooted to the mail queue
+# directory (pathname is controlled by the \fBqueue_directory\fR
+# configuration variable in the main.cf file).
+# .sp
+# Chroot should not be used with the \fBlocal\fR(8),
+# \fBpipe\fR(8), \fBspawn\fR(8), and \fBvirtual\fR(8) daemons.
+# Although the
+# \fBproxymap\fR(8) server can run chrooted, doing so defeats
+# most of the purpose of having that service in the first
+# place.
+# .sp
+# The files in the examples/chroot-setup subdirectory of the
+# Postfix source show how to set up a Postfix chroot environment
+# on a variety of systems. See also BASIC_CONFIGURATION_README
+# for issues related to running daemons chrooted.
+# .IP "\fBWake up time (default: 0)\fR"
+# Automatically wake up the named service after the specified
+# number of seconds. The wake up is implemented by connecting
+# to the service and sending a wake up request. A ? at the
+# end of the wake-up time field requests that no wake up
+# events be sent before the first time a service is used.
+# Specify 0 for no automatic wake up.
+# .sp
+# The \fBpickup\fR(8), \fBqmgr\fR(8) and \fBflush\fR(8)
+# daemons require a wake up timer.
+# .IP "\fBProcess limit (default: $default_process_limit)\fR"
+# The maximum number of processes that may execute this
+# service simultaneously. Specify 0 for no process count limit.
+# .sp
+# NOTE: Some Postfix services must be configured as a
+# single-process service (for example, \fBqmgr\fR(8)) and
+# some services must be configured with no process limit (for
+# example, \fBcleanup\fR(8)). These limits must not be
+# changed.
+# .IP "\fBCommand name + arguments\fR"
+# The command to be executed. Characters that are special
+# to the shell such as ">" or "|" have no special meaning
+# here, and quotes cannot be used to protect arguments
+# containing whitespace. To protect whitespace, use "{"
+# and "}" as described below.
+# .sp
+# The command name is relative to the Postfix daemon directory
+# (pathname is controlled by the \fBdaemon_directory\fR
+# configuration variable).
+# .sp
+# The command argument syntax for specific commands is
+# specified in the respective daemon manual page.
+# .sp
+# The following command-line options have the same effect for
+# all daemon programs:
+# .RS
+# .IP \fB-D\fR
+# Run the daemon under control by the command specified with
+# the \fBdebugger_command\fR variable in the main.cf
+# configuration file. See DEBUG_README for hints and tips.
+# .IP "\fB-o { \fIname\fR = \fIvalue\fB }\fR (long form, Postfix >= 3.0)"
+# .IP "\fB-o \fIname\fR=\fIvalue\fR (short form)"
+# Override the named main.cf configuration parameter. The
+# parameter value can refer to other parameters as \fI$name\fR
+# etc., just like in main.cf. See \fBpostconf\fR(5) for
+# syntax.
+# .sp
+# NOTE 1: With the "long form" shown above, whitespace
+# after "{", around "=", and before "}" is ignored, and
+# whitespace within the parameter value is preserved.
+# .sp
+# NOTE 2: with the "short form" shown above, do not specify
+# whitespace around the "=" or in
+# parameter values. To specify a parameter value that contains
+# whitespace, use the long form described above, or use commas
+# instead of spaces, or specify the value in main.cf. Example:
+# .sp
+# .nf
+# /etc/postfix/master.cf:
+# submission inet .... smtpd
+# -o smtpd_xxx_yyy=$submission_xxx_yyy
+# .sp
+# /etc/postfix/main.cf
+# submission_xxx_yyy = text with whitespace...
+# .fi
+# .sp
+# NOTE 3: Over-zealous use of parameter overrides makes the
+# Postfix configuration hard to understand and maintain. At
+# a certain point, it might be easier to configure multiple
+# instances of Postfix, instead of configuring multiple
+# personalities via master.cf.
+# .IP \fB-v\fR
+# Increase the verbose logging level. Specify multiple \fB-v\fR
+# options to make a Postfix daemon process increasingly verbose.
+# .IP "Other command-line arguments"
+# Specify "{" and "}" around command arguments that contain
+# whitespace (Postfix 3.0 and later). Whitespace
+# after "{" and before "}" is ignored.
+# SEE ALSO
+# master(8), process manager
+# postconf(5), configuration parameters
+# README FILES
+# .ad
+# .fi
+# Use "\fBpostconf readme_directory\fR" or
+# "\fBpostconf html_directory\fR" to locate this information.
+# .na
+# .nf
+# BASIC_CONFIGURATION_README, basic configuration
+# DEBUG_README, Postfix debugging
+# LICENSE
+# .ad
+# .fi
+# The Secure Mailer license must be distributed with this software.
+# AUTHOR(S)
+# Initial version by
+# Magnus Baeck
+# Lund Institute of Technology
+# Sweden
+#
+# Wietse Venema
+# IBM T.J. Watson Research
+# P.O. Box 704
+# Yorktown Heights, NY 10598, USA
+#
+# Wietse Venema
+# Google, Inc.
+# 111 8th Avenue
+# New York, NY 10011, USA
+#--