#++
# 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, started on-demand by 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
#	execute the software with \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 a service is internal to Postfix (pathname starts
#	with \fBprivate/\fR), or exposed through Postfix command-line
#	tools (pathname starts with \fBpublic/\fR).
#	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 "\fBCommand-line arguments that start with {\fR"
#	With Postfix 3.0 and later specify "{" and "}" around command
#	arguments that start with "{". The outer "{" and "}" are
#	removed from the input, together with any leading or trailing
#	whitespace.
# .IP "\fBOther command-line arguments\fR"
#	Specify "{" and "}" around command arguments that contain
#	whitespace (Postfix 3.0 and later). The outer "{" and "}"
#	are removed from the input, together with any leading or
#	trailing whitespace.
# 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
#--
