Get the default configuration file postfix for Postfix, optimized for Ubuntu 16.04 LTS (Xenial Xerus). 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/init.d/postfix.
For more configurations and setup guides, visit our related files section to further customize your system.
#!/bin/sh -e
# Start or stop Postfix
#
# LaMont Jones <lamont@debian.org>
# based on sendmail's init.d script
### BEGIN INIT INFO
# Provides: postfix mail-transport-agent
# Required-Start: $local_fs $remote_fs $syslog $named $network $time
# Required-Stop: $local_fs $remote_fs $syslog $named $network
# Should-Start: postgresql mysql clamav-daemon postgrey spamassassin saslauthd dovecot
# Should-Stop: postgresql mysql clamav-daemon postgrey spamassassin saslauthd dovecot
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Postfix Mail Transport Agent
# Description: postfix is a Mail Transport agent
### END INIT INFO
PATH=/bin:/usr/bin:/sbin:/usr/sbin
DAEMON=/usr/sbin/postfix
NAME=Postfix
TZ=
unset TZ
# Defaults - don't touch, edit /etc/default/postfix
SYNC_CHROOT="y"
test -f /etc/default/postfix && . /etc/default/postfix
test -x $DAEMON && test -f /etc/postfix/main.cf || exit 0
. /lib/lsb/init-functions
#DISTRO=$(lsb_release -is 2>/dev/null || echo Debian)
enabled_instances() {
postmulti -l -a | awk '($3=="y") { print $1}'
}
running() {
INSTANCE="$1"
if [ "X$INSTANCE" = X ]; then
POSTCONF="postconf"
else
POSTCONF="postmulti -i $INSTANCE -x postconf"
fi
queue=$($POSTCONF -h queue_directory 2>/dev/null || echo /var/spool/postfix)
daemondir=$($POSTCONF -h daemon_directory 2>/dev/null || echo /usr/lib/postfix/sbin)
if [ -f ${queue}/pid/master.pid ]; then
pid=$(sed 's/ //g' ${queue}/pid/master.pid)
# what directory does the executable live in. stupid prelink systems.
dir=$(ls -l /proc/$pid/exe 2>/dev/null | sed 's/.* -> //; s/\/[^\/]*$//')
if [ "X$dir" = "X${daemondir}" ]; then
echo y
fi
fi
}
configure_instance() {
INSTANCE="$1"
if [ "X$INSTANCE" = X ]; then
POSTCONF="postconf"
else
POSTCONF="postmulti -i $INSTANCE -x postconf"
fi
# if you set myorigin to 'ubuntu.com' or 'debian.org', it's wrong, and annoys the admins of
# those domains. See also sender_canonical_maps.
MYORIGIN=$($POSTCONF -h myorigin | tr 'A-Z' 'a-z')
if [ "X${MYORIGIN#/}" != "X${MYORIGIN}" ]; then
MYORIGIN=$(tr 'A-Z' 'a-z' < $MYORIGIN)
fi
if [ "X$MYORIGIN" = Xubuntu.com ] || [ "X$MYORIGIN" = Xdebian.org ]; then
log_failure_msg "Invalid \$myorigin ($MYORIGIN), refusing to start"
log_end_msg 1
exit 1
fi
config_dir=$($POSTCONF -h config_directory)
# see if anything is running chrooted.
NEED_CHROOT=$(awk '/^[0-9a-z]/ && ($5 ~ "[-yY]") { print "y"; exit}' ${config_dir}/master.cf)
if [ -n "$NEED_CHROOT" ] && [ -n "$SYNC_CHROOT" ]; then
# Make sure that the chroot environment is set up correctly.
oldumask=$(umask)
umask 022
queue_dir=$($POSTCONF -h queue_directory)
cd "$queue_dir"
# copy the CA path if specified
ca_path=$($POSTCONF -h smtp_tls_CApath)
case "$ca_path" in
'') :;; # no ca_path
$queue_dir/*) :;; # skip stuff already in chroot, (and to make vim syntax happy: */)
*)
if test -d "$ca_path"; then
dest_dir="$queue_dir/${ca_path#/}"
# strip any/all trailing /
while [ "${dest_dir%/}" != "${dest_dir}" ]; do
dest_dir="${dest_dir%/}"
done
new=0
if test -d "$dest_dir"; then
# write to a new directory ...
dest_dir="${dest_dir}.NEW"
new=1
fi
mkdir --parent ${dest_dir}
# handle files in subdirectories
(cd "$ca_path" && find . -name '*.pem' -not -xtype l -print0 | cpio -0pdL --quiet "$dest_dir") 2>/dev/null ||
(log_failure_msg failure copying certificates; exit 1)
c_rehash "$dest_dir" >/dev/null 2>&1
if [ "$new" = 1 ]; then
# and replace the old directory
rm -rf "${dest_dir%.NEW}"
mv "$dest_dir" "${dest_dir%.NEW}"
fi
fi
;;
esac
# if there is a CA file, copy it
ca_file=$($POSTCONF -h smtp_tls_CAfile)
case "$ca_file" in
$queue_dir/*) :;; # skip stuff already in chroot
'') # no ca_file
# or copy the bundle to preserve functionality
ca_bundle=/etc/ssl/certs/ca-certificates.crt
if [ -f $ca_bundle ]; then
mkdir --parent "$queue_dir/${ca_bundle%/*}"
cp -L "$ca_bundle" "$queue_dir/${ca_bundle%/*}"
fi
;;
*)
if test -f "$ca_file"; then
dest_file="$queue_dir/${ca_file#/}"
if [ -d "${dest_file}" ]; then
# There was a bug where we created the dest_file as a
# directory. Address that by removing it with
# prejudice. Debian bug #815906
rm -rf "${dest_file}"
fi
dest_dir="${dest_file%/*}"
mkdir --parent "$dest_dir"
cp -L "$ca_file" "$dest_dir"
fi
;;
esac
# if we're using unix:passwd.byname, then we need to add etc/passwd.
local_maps=$($POSTCONF -h local_recipient_maps)
if [ "X$local_maps" != "X${local_maps#*unix:passwd.byname}" ]; then
if [ "X$local_maps" = "X${local_maps#*proxy:unix:passwd.byname}" ]; then
sed 's/^\([^:]*\):[^:]*/\1:x/' /etc/passwd > etc/passwd
chmod a+r etc/passwd
fi
fi
FILES="etc/localtime etc/services etc/resolv.conf etc/hosts \
etc/host.conf etc/nsswitch.conf etc/nss_mdns.config"
for file in $FILES; do
[ -d ${file%/*} ] || mkdir -p ${file%/*}
if [ -f /${file} ]; then rm -f ${file} && cp /${file} ${file}; fi
if [ -f ${file} ]; then chmod a+rX ${file}; fi
done
# ldaps needs this. debian bug 572841
(echo /dev/random; echo /dev/urandom) | cpio -pdL --quiet . 2>/dev/null || true
rm -f usr/lib/zoneinfo/localtime
mkdir -p usr/lib/zoneinfo
ln -sf /etc/localtime usr/lib/zoneinfo/localtime
LIBLIST=$(for name in gcc_s nss resolv; do
for f in /lib/*/lib${name}*.so* /lib/lib${name}*.so*; do
if [ -f "$f" ]; then echo ${f#/}; fi;
done;
done)
if [ -n "$LIBLIST" ]; then
for f in $LIBLIST; do
rm -f "$f"
done
tar cf - -C / $LIBLIST 2>/dev/null |tar xf -
fi
umask $oldumask
fi
}
case "$1" in
start)
log_daemon_msg "Starting Postfix Mail Transport Agent" postfix
RET=0
# for all instances that are not already running, handle chroot setup if needed, and start
for INSTANCE in $(enabled_instances); do
RUNNING=$(running $INSTANCE)
if [ "X$RUNNING" = X ]; then
configure_instance $INSTANCE
CMD="/usr/sbin/postmulti -- -i $INSTANCE -x ${DAEMON}"
if ! start-stop-daemon --start --exec $CMD quiet-quick-start; then
RET=1
fi
fi
done
log_end_msg $RET
;;
stop)
log_daemon_msg "Stopping Postfix Mail Transport Agent" postfix
RET=0
# for all instances that are not already running, handle chroot setup if needed, and start
for INSTANCE in $(enabled_instances); do
RUNNING=$(running $INSTANCE)
if [ "X$RUNNING" != X ]; then
CMD="/usr/sbin/postmulti -i $INSTANCE -x ${DAEMON}"
if ! ${CMD} quiet-stop; then
RET=1
fi
fi
done
log_end_msg $RET
;;
restart)
$0 stop
$0 start
;;
force-reload|reload)
log_action_begin_msg "Reloading Postfix configuration"
if ${DAEMON} quiet-reload; then
log_action_end_msg 0
else
log_action_end_msg 1
fi
;;
status)
ALL=1
ANY=0
# for all instances that are not already running, handle chroot setup if needed, and start
for INSTANCE in $(enabled_instances); do
RUNNING=$(running $INSTANCE)
if [ "X$RUNNING" != X ]; then
ANY=1
else
ALL=0
fi
done
# handle the case when postmulti returns *no* configured instances
if [ $ANY = 0 ]; then
ALL=0
fi
if [ $ALL = 1 ]; then
log_success_msg "postfix is running"
exit 0
elif [ $ANY = 1 ]; then
log_success_msg "some postfix instances are running"
exit 0
else
log_success_msg "postfix is not running"
exit 3
fi
;;
flush|check|abort)
${DAEMON} $1
;;
*)
log_action_msg "Usage: /etc/init.d/postfix {start|stop|restart|reload|flush|check|abort|force-reload|status}"
exit 1
;;
esac
exit 0
Download the raw file with wget or curl
wget -O postfix.example https://exampleconfig.com/static/raw/postfix/ubuntu16.04/etc/init.d/postfix
curl https://exampleconfig.com/static/raw/postfix/ubuntu16.04/etc/init.d/postfix > postfix.example
Other config files you might find useful
