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4. Fichero de configuración

Ejemplo de master.cf

#
# Postfix master process configuration file.  Each line describes how
# a mailer component program should be run. The fields that make up
# each line are described below. A "-" field value requests that a
# default value be used for that field.
#
# Service: any name that is valid for the specified transport type
# (the next field).  With INET transports, a service is specified as
# host:port.  The host part (and colon) may be omitted. Either host
# or port may be given in symbolic form or in numeric form. Examples
# for the SMTP server:  localhost:smtp receives mail via the loopback
# interface only; 10025 receives mail on port 10025.
#
# Transport type: "inet" for Internet sockets, "unix" for UNIX-domain
# sockets, "fifo" for named pipes.
#
# Private: whether or not access is restricted to the mail system.
# Default is private service.  Internet (inet) sockets can't be private.
#
# Unprivileged: whether the service runs with root privileges or as
# the owner of the Postfix system (the owner name is controlled by the
# mail_owner configuration variable in the main.cf file).
#
# Chroot: whether or not the service runs chrooted to the mail queue
# directory (pathname is controlled by the queue_directory configuration
# variable in the main.cf file). Presently, all Postfix daemons can run
# chrooted, except for the pipe and local daemons. The files in the
# examples/chroot-setup subdirectory describe how to set up a Postfix
# chroot environment for your type of machine.
#
# Wakeup time: automatically wake up the named service after the
# specified number of seconds. A ? at the end of the wakeup time
# field requests that wake up events be sent only to services that
# are actually being used.  Specify 0 for no wakeup. Presently, only
# the pickup, queue manager and flush daemons need a wakeup timer.
#
# Max procs: the maximum number of processes that may execute this
# service simultaneously. Default is to use a globally configurable
# limit (the default_process_limit configuration parameter in main.cf).
# Specify 0 for no process count limit.
#
# Command + args: the command to be executed. The command name is
# relative to the Postfix program directory (pathname is controlled by
# the program_directory configuration variable). Adding one or more
# -v options turns on verbose logging for that service; adding a -D
# option enables symbolic debugging (see the debugger_command variable
# in the main.cf configuration file). See individual command man pages
# for specific command-line options, if any.
#
# In order to use the "uucp" message tranport below, set up entries
# in the transport table.
#
# In order to use the "cyrus" message transport below, configure it
# in main.cf as the mailbox_transport.
#
# SPECIFY ONLY PROGRAMS THAT ARE WRITTEN TO RUN AS POSTFIX DAEMONS.
# ALL DAEMONS SPECIFIED HERE MUST SPEAK A POSTFIX-INTERNAL PROTOCOL.
#
# DO NOT CHANGE THE ZERO PROCESS LIMIT FOR CLEANUP/BOUNCE/DEFER OR
# POSTFIX WILL BECOME STUCK UP UNDER HEAVY LOAD
#
# DO NOT CHANGE THE ONE PROCESS LIMIT FOR PICKUP/QMGR OR POSTFIX WILL
# DELIVER MAIL MULTIPLE TIMES.
#
# DO NOT SHARE THE POSTFIX QUEUE BETWEEN MULTIPLE POSTFIX INSTANCES.
#
# ==========================================================================
# service type	private	unpriv	chroot	wakeup	maxproc	command + args
# 		(yes)	(yes)	(yes)	(never)	(50)
# ==========================================================================
smtp	  inet	n	-	-	-	-	smtpd
#628	  inet	n	-	-	-	-	qmqpd
pickup	  fifo	n	-	-	60	1	pickup
cleanup	  unix	n	-	-	-	0	cleanup
qmgr	  fifo	n	-	-	300	1	qmgr
#qmgr	  fifo	n	-	-	300	1	nqmgr
rewrite	  unix	-	-	-	-	-	trivial-rewrite
bounce	  unix	-	-	-	-	0	bounce
defer	  unix	-	-	-	-	0	bounce
flush	  unix	n	-	-	1000?	0	flush
smtp	  unix	-	-	-	-	-	smtp
showq     unix	n	-	-	-	-	showq
error     unix	-	-	-	-	-	error
local	  unix	-	n	n	-	-	local
virtual	  unix	-	n	n	-	-	virtual
lmtp	  unix	-	-	n	-	-	lmtp
#
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
# The Cyrus deliver program has changed incompatibly.
#
cyrus	  unix	-	n	n	-	-	pipe
  flags=R user=cyrus argv=/usr/sbin/cyrdeliver -e -m ${extension} ${user}
uucp	  unix	-	n	n	-	-	pipe
  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
ifmail    unix  -       n       n       -       -       pipe
  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp     unix  -       n       n       -       -       pipe
  flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -d -t$nexthop -f$sender $recipient
scalemail-backend unix	-	n	n	-	2	pipe
  flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}

# only used by postfix-tls
#smtps	  inet	n	-	n	-	-	smtpd -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes
#587	  inet	n	-	n	-	-	smtpd -o smtpd_enforce_tls=yes -o smtpd_sasl_auth_enable=yes