Postfix postfix-script configuration example for Ubuntu 18.04 LTS (Bionic Beaver)

Get the default configuration file postfix-script for Postfix, optimized for Ubuntu 18.04 LTS (Bionic Beaver). This example configuration ensures optimal compatibility and performance for Postfix, making it easy to set up and adjust to meet your needs.

Find and download the configuration file here: /etc/postfix/postfix-script.

For more configurations and setup guides, visit our related files section to further customize your system.

    #!/bin/sh

#++
# NAME
#	postfix-script 1
# SUMMARY
#	execute Postfix administrative commands
# SYNOPSIS
#	\fBpostfix-script\fR \fIcommand\fR
# DESCRIPTION
#	The \fBpostfix-script\fR script executes Postfix administrative
#	commands in an environment that is set up by the \fBpostfix\fR(1)
#	command.
# SEE ALSO
#	master(8) Postfix master program
#	postfix(1) Postfix administrative interface
# LICENSE
# .ad
# .fi
#	The Secure Mailer license must be distributed with this software.
# AUTHOR(S)
#	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
#--

# Avoid POSIX death due to SIGHUP when some parent process exits.

trap '' 1

case $daemon_directory in
"") echo This script must be run by the postfix command. 1>&2
    echo Do not run directly. 1>&2
    exit 1
esac

LOGGER="$command_directory/postlog -t $MAIL_LOGTAG/postfix-script"
INFO="$LOGGER -p info"
WARN="$LOGGER -p warn"
ERROR="$LOGGER -p error"
FATAL="$LOGGER -p fatal"
PANIC="$LOGGER -p panic"

if [ "X${1#quiet-}" != "X${1}" ]; then
    INFO=:
    x=${1#quiet-}
    shift
    set -- $x "$@"
fi

umask 022
SHELL=/bin/sh

#
# Can't do much without these in place.
#
cd $command_directory || {
	$FATAL no Postfix command directory $command_directory!
	exit 1
}
cd $daemon_directory || {
	$FATAL no Postfix daemon directory $daemon_directory!
	exit 1
}
test -f master || {
	$FATAL no Postfix master program $daemon_directory/master!
	exit 1
}
cd $config_directory || {
	$FATAL no Postfix configuration directory $config_directory!
	exit 1
}
case $shlib_directory in
no) ;;
 *) cd $shlib_directory || {
	$FATAL no Postfix shared-library directory $shlib_directory!
        exit 1
    }
esac
cd $meta_directory || {
	$FATAL no Postfix meta directory $meta_directory!
	exit 1
}
cd $queue_directory || {
	$FATAL no Postfix queue directory $queue_directory!
	exit 1
}
def_config_directory=`$command_directory/postconf -dh config_directory` || {
	$FATAL cannot execute $command_directory/postconf!
	exit 1
}

# If this is a secondary instance, don't touch shared files.

instances=`test ! -f $def_config_directory/main.cf ||
    $command_directory/postconf -c $def_config_directory \
    -h multi_instance_directories | sed 's/,/ /'` || {
	$FATAL cannot execute $command_directory/postconf!
	exit 1
}

check_shared_files=1
for name in $instances
do
    case "$name" in
    "$def_config_directory") ;;
    "$config_directory") check_shared_files=; break;;
    esac
done

#
# Parse JCL
#
case $1 in

start_msg)

	echo "Start postfix"
	;;

stop_msg)

	echo "Stop postfix"
	;;

quick-start)

       $daemon_directory/master -t 2>/dev/null || {
               $FATAL the Postfix mail system is already running
               exit 1
       }
       $daemon_directory/postfix-script quick-check || {
               $FATAL Postfix integrity check failed!
               exit 1
       }
       $INFO starting the Postfix mail system
       $daemon_directory/master &
       ;;

start|start-fg)

	$daemon_directory/master -t 2>/dev/null || {
		$FATAL the Postfix mail system is already running
		exit 1
	}
	if [ -f $queue_directory/quick-start ]
	then
		rm -f $queue_directory/quick-start
	else
		$daemon_directory/postfix-script check-fatal || {
			$FATAL Postfix integrity check failed!
			exit 1
		}
		# Foreground this so it can be stopped. All inodes are cached.
		$daemon_directory/postfix-script check-warn
	fi
	$INFO starting the Postfix mail system
	case $1 in
	start)
	    # NOTE: wait in foreground process to get the initialization status.
	    $daemon_directory/master -w || {
		$FATAL "mail system startup failed"
		exit 1
	    }
	    ;;
	start-fg)
	    # Foreground start-up is incompatible with multi-instance mode.
	    # We can't use "exec $daemon_directory/master" here: that would
	    # break process group management, and "postfix stop" would kill
	    # too many processes.
	    case $instances in
	    "") $daemon_directory/master
		;;
	     *) $FATAL "start-fg does not support multi_instance_directories"
		exit 1
		;;
	    esac
	    ;;
	esac
	;;

drain)

	$daemon_directory/master -t 2>/dev/null && {
		$FATAL the Postfix mail system is not running
		exit 1
	}
	$INFO stopping the Postfix mail system
	kill -9 `sed 1q pid/master.pid`
	;;

quick-stop)

	$daemon_directory/postfix-script stop
	touch $queue_directory/quick-start
	;;

stop)

	$daemon_directory/master -t 2>/dev/null && {
		$FATAL the Postfix mail system is not running
		exit 0
	}
	$INFO stopping the Postfix mail system
	kill `sed 1q pid/master.pid`
	for i in 5 4 3 2 1
	do
	    $daemon_directory/master -t && exit 0
	    $INFO waiting for the Postfix mail system to terminate
	    sleep 1
	done
	$WARN stopping the Postfix mail system with force
	pid=`awk '{ print $1; exit 0 } END { exit 1 }' pid/master.pid` && 
		kill -9 -$pid
	;;

abort)

	$daemon_directory/master -t 2>/dev/null && {
		$FATAL the Postfix mail system is not running
		exit 0
	}
	$INFO aborting the Postfix mail system
	kill `sed 1q pid/master.pid`
	;;

reload)

	$daemon_directory/master -t 2>/dev/null && {
		$FATAL the Postfix mail system is not running
		exit 1
	}
	$INFO refreshing the Postfix mail system
	$command_directory/postsuper active || exit 1
	kill -HUP `sed 1q pid/master.pid`
	$command_directory/postsuper &
	;;

flush)

	cd $queue_directory || {
		$FATAL no Postfix queue directory $queue_directory!
		exit 1
	}
	$command_directory/postqueue -f
	;;

check)

	$daemon_directory/postfix-script check-fatal || exit 1
	$daemon_directory/postfix-script check-warn
	exit 0
	;;

status)

	$daemon_directory/master -t 2>/dev/null && {
		$INFO the Postfix mail system is not running
		exit 1
	}
	$INFO the Postfix mail system is running: PID: `sed 1q pid/master.pid`
	exit 0
	;;

quick-check)
	# This command is NOT part of the public interface.

	$SHELL $daemon_directory/post-install create-missing || {
		$WARN unable to create missing queue directories
		exit 1
	}

	# Look for incomplete installations.

	test -f $config_directory/master.cf || {
		$FATAL no $config_directory/master.cf file found
		exit 1
	}
	exit 0
	;;

check-fatal)
	# This command is NOT part of the public interface.

	$daemon_directory/postfix-script quick-check

	# See if all queue files are in the right place. This is slow.
	# We must scan all queues for mis-named queue files before the
	# mail system can run.

	$command_directory/postsuper || exit 1
	exit 0
	;;

check-warn)
	# This command is NOT part of the public interface.

	# Check Postfix root-owned directory owner/permissions.

	find $queue_directory/. $queue_directory/pid \
	    -prune ! -user root \
	    -exec $WARN not owned by root: {} \;

	find $queue_directory/. $queue_directory/pid \
	    -prune \( -perm -020 -o -perm -002 \) \
	    -exec $WARN group or other writable: {} \;

	# Check Postfix root-owned directory tree owner/permissions.

	todo="$config_directory/."
	test -n "$check_shared_files" && {
		todo="$daemon_directory/. $meta_directory/. $todo"
		test "$shlib_directory" = "no" || 
		    todo="$shlib_directory/. $todo"
	}
	todo=`echo "$todo" | tr ' ' '\12' | sort -u`

	find $todo ! -user root \
	    -exec $WARN not owned by root: {} \;

	# Handle symlinks separately
	find -L $todo \( -perm -020 -o -perm -002 \) \
	    -exec $WARN group or other writable: {} \;

	find $todo -type l | while read f; do \
	    readlink "$f" | grep -q / && $WARN symlink leaves directory: "$f"; \
	done; \

	# Check Postfix mail_owner-owned directory tree owner/permissions.

	find $data_directory/. ! -user $mail_owner \
	    -exec $WARN not owned by $mail_owner: {} \;

	find $data_directory/. \( -perm -020 -o -perm -002 \) \
	    -exec $WARN group or other writable: {} \;

	# Check Postfix mail_owner-owned directory tree owner.

	find `ls -d $queue_directory/* | \
	    egrep '/(saved|incoming|active|defer|deferred|bounce|hold|trace|corrupt|public|private|flush)$'` \
	    ! \( -type p -o -type s \) ! -user $mail_owner \
		-exec $WARN not owned by $mail_owner: {} \;

	# WARNING: this should not descend into the maildrop directory.
	# maildrop is the least trusted Postfix directory.

	find $queue_directory/maildrop -prune ! -user $mail_owner \
	    -exec $WARN not owned by $mail_owner: $queue_directory/maildrop \;

	# Check Postfix setgid_group-owned directory and file group/permissions.

	todo="$queue_directory/public $queue_directory/maildrop"
	test -n "$check_shared_files" && 
	   todo="$command_directory/postqueue $command_directory/postdrop $todo"

	find $todo \
	    -prune ! -group $setgid_group \
	    -exec $WARN not owned by group $setgid_group: {} \;

	test -n "$check_shared_files" &&
	find $command_directory/postqueue $command_directory/postdrop \
	    -prune ! -perm -02111 \
	    -exec $WARN not set-gid or not owner+group+world executable: {} \;

	# Check non-Postfix root-owned directory tree owner/content.

	for dir in bin etc lib sbin usr
	do
	    test -d $dir && {
		find $dir ! -user root \
		    -exec $WARN not owned by root: $queue_directory/{} \;

		find $dir -type f -print | while read path
		do
		    test -f /$path && {
			cmp -s $path /$path || 
			    $WARN $queue_directory/$path and /$path differ
		    }
		done
	    }
	done

	find corrupt -type f -exec $WARN damaged message: {} \;

	# Check for non-Postfix MTA remnants.

	test -n "$check_shared_files" -a -f /usr/sbin/sendmail -a \
		-f /usr/lib/sendmail && {
	    cmp -s /usr/sbin/sendmail /usr/lib/sendmail || {
		$WARN /usr/lib/sendmail and /usr/sbin/sendmail differ
		$WARN Replace one by a symbolic link to the other
	    }
	}
	exit 0
	;;

set-permissions|upgrade-configuration)
	$daemon_directory/post-install create-missing "$@"
	;;

post-install)
	# Currently not part of the public interface.
	shift
	$daemon_directory/post-install "$@"
	;;

tls)
	shift
	$daemon_directory/postfix-tls-script "$@"
	;;

/*)
	# Currently not part of the public interface.
	"$@"
	;;

*)
	$FATAL "unknown command: '$1'. Usage: postfix start (or stop, reload, abort, flush, check, status, set-permissions, upgrade-configuration)"
	exit 1
	;;

esac

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