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#!/bin/bash
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###########################################################################################
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##				    ALCASAR MAIL SERVICE CONFIGURATION
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##
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##	Script by K@M3L & T3RRY (LaPlateforme.io), joss_p & Rexy
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##  This script configure PostFix
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##		0 : no email autoregistration
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##		1 : PostFix is the SMTP server
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##		2 : PostFix relay to an other SMTP server
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##		3 : PostFix use an external email address (with Cyrus-SASL)
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###########################################################################################
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######################################################
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##			Email configuration examples (mode = 3)
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## common parameters : smtp_use_tls = yes, smtp_tls_security_level = encrypt, smtp_sasl_auth_enable = yes
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## common rules : 'myhostname' parameter should be the domain name of the sasl_email account
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########## smtp.free.fr:465 (expose mechanisms : PLAIN LOGIN CRAM-MD5 DIGEST-MD5)
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## smtp_sasl_security_option = noanonymous, relayhost = [smtp.free.fr]:465, smtp_tls_wrappermode = yes
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########## smtp.free.fr:587 (expose mechanismes
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## smtp_sasl_security_option = noanonymous, relayhost = [smtp.free.fr]:587, smtp_tls_wrappermode = no, smtputf8_enable = no
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########## smtp.orange.fr:465 (expose mechanisms : LOGIN PLAIN)
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## smtp_sasl_security_option = noanonymous, relayhost = [smtp.orange.fr]:465, smtp_tls_wrappermode = yes, smtputf8_enable = no
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########## smtp.sfr.fr:465 (expose mechanisms : LOGIN PLAIN)
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## smtp_sasl_security_option = noanonymous, relayhost = [smtp.sfr.fr]:465, smtp_tls_wrappermode = yes
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########## smtp.laposte.net:465 (expose mechanisms : LOGIN PLAIN)
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## smtp_sasl_security_option = noanonymous, relayhost = [laposte.net]:465, smtp_tls_wrappermode = yes
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########## smtp.bbox.net:465 (expose mechanisms : LOGIN PLAIN)
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## smtp_sasl_security_option = noanonymous, relayhost = [laposte.net]:465, smtp_tls_wrappermode = yes
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########## smtp.gmail.com:587 (expose mechanisms : LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH)
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## smtp_sasl_security_option = noanonymous, relayhost = [gmail.com]:587, smtp_tls_wrappermode = no
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## In this case (gmail) the password must be an "application password" created via the gmail account manager (security tab)
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# ****** Paths *******
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SED="/bin/sed -i"
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CONF_FILE="/usr/local/etc/alcasar.conf"
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POSTFIX_CONF_FILE="/etc/postfix/main.cf"
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LOCAL_IPTABLE_FILE="/usr/local/etc/alcasar-iptables-local.sh"
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SASLPATH="/etc/postfix/sasl"
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smtpIP="0.0.0.0/0"
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hostName=`grep ^HOSTNAME= $CONF_FILE|cut -d"=" -f2`
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domainName=`grep ^DOMAIN= $CONF_FILE|cut -d"=" -f2`
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usage="Usage: alcasar-mail_install.sh -h|-0|-1|-2|-3"
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nb_args=$#
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if [ $nb_args -eq 0 ]; then  # apply alcasar.conf
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	mail=`grep ^MAIL= $CONF_FILE|cut -d"=" -f2`
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	if [ "$mail" = "off" ]; then
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		TYPE_MAIL=0
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	else
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		TYPE_MAIL=`grep ^MAIL_TYPE= $CONF_FILE|cut -d"=" -f2`
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		smtpPort=`grep ^MAIL_SMTP_PORT= $CONF_FILE|cut -d"=" -f2`
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		smtpIP=`grep ^MAIL_SMTP_IP= $CONF_FILE|cut -d"=" -f2`
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		mailAddr=`grep ^MAIL_ADDR= $CONF_FILE|cut -d"=" -f2`
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		[ -e ${SASLPATH}/sasl_passwd ] && mailMdp=`cat $SASLPATH/sasl_passwd|cut -d":" -f3`
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		adminMail=`grep ^MAIL_ADMIN= $CONF_FILE|cut -d"=" -f2`
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		whiteDomain=`grep ^MAIL_WHITEDOMAIN= $CONF_FILE|cut -d"=" -f2`
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	fi
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else # apply args
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	if [ "$1" = "-h" ] || [ "$1" = "--h" ]; then
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		echo $usage
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		exit 0
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	fi
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	while getopts ":h:s:p:m:o:a:w:0123" option
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	do
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		case $option in
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			0)
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				TYPE_MAIL=0
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			;;
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			1)
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				TYPE_MAIL=1
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			;;
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			2)
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				TYPE_MAIL=2
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			;;
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			3)
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				TYPE_MAIL=3
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			;;
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			p)
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				smtpPort=$OPTARG
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			;;
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			s)
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				smtpIP=$OPTARG
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			;;
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			m)
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				mailAddr=$OPTARG
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			;;
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			o)
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				mailMdp=$OPTARG
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			;;
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			a)
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				adminMail=$OPTARG
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			;;
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			w)
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				whiteDomain=$OPTARG
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			;;
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			:)
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				echo "L'option $OPTARG requiert un argument"
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				exit 1
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			;;
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			\?)
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				echo "$OPTARG : option invalide"
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				exit 1
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			;;
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		esac
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	done
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fi
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if  [[ $TYPE_MAIL -eq 0 ]]; then # disable mail service
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	$SED "s/^MAIL=.*/MAIL=off/" $CONF_FILE
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	$SED "s/^MAIL_TYPE=.*/MAIL_TYPE=/" $CONF_FILE
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	$SED "s/^MAIL_SMTP_IP=.*/MAIL_SMTP_IP=/" $CONF_FILE
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	$SED "s/^MAIL_SMTP_PORT=.*/MAIL_SMTP_PORT=/" $CONF_FILE
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	$SED "s/^MAIL_ADDR=.*/MAIL_ADDR=/" $CONF_FILE
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	$SED "s/^MAIL_WHITEDOMAIN=.*/MAIL_WHITEDOMAIN=/" $CONF_FILE
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	$SED "s/^MAIL_ADMIN=.*/MAIL_ADMIN=/" $CONF_FILE
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	$SED "/^SMTP_IP=/ s/^/#/" $LOCAL_IPTABLE_FILE
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	$SED "/^SMTP_PORT=/ s/^/#/" $LOCAL_IPTABLE_FILE
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	$SED "s/^\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT.*/#\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT -d \$SMTP_IP -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT.*/#\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT -s \$SMTP_IP -m conntrack --ctstate ESTABLISHED     -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^relayhost =.*/relayhost =/" $POSTFIX_CONF_FILE
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	$SED "s/^smtp_tls_security_level =.*/smtp_tls_security_level = may/g" $POSTFIX_CONF_FILE
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	$SED "s/^smtp_tls_wrappermode =.*/smtp_tls_wrappermode = no/g" $POSTFIX_CONF_FILE
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	$SED "s/^myhostname =.*/myhostname = $hostName.$domainName/g" $POSTFIX_CONF_FILE
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	[ -e ${SASLPATH}/sasl_passwd ] && rm -f ${SASLPATH}/*
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elif [[ $TYPE_MAIL -eq 1 ]]; then # Enable mail service (act as smtp server)
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	$SED "s/^MAIL=.*/MAIL=on/" $CONF_FILE
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	$SED "s/^MAIL_TYPE=.*/MAIL_TYPE=1/" $CONF_FILE
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	$SED "s/^MAIL_SMTP_IP=.*/MAIL_SMTP_IP=/" $CONF_FILE
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	$SED "s/^MAIL_SMTP_PORT=.*/MAIL_SMTP_PORT=$smtpPort/" $CONF_FILE
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	$SED "s/^MAIL_ADDR=.*/MAIL_ADDR=/" $CONF_FILE
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	$SED "s/^MAIL_WHITEDOMAIN=.*/MAIL_WHITEDOMAIN=$whiteDomain/" $CONF_FILE
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	$SED "s/^MAIL_ADMIN=.*/MAIL_ADMIN=$adminMail/" $CONF_FILE
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	$SED "/^SMTP_IP=/ s/^/#/" $LOCAL_IPTABLE_FILE
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	$SED "s/^SMTP_PORT=.*/SMTP_PORT=$smtpPort/" $LOCAL_IPTABLE_FILE
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	$SED "s/^\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT.*/\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT.*/\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT -m conntrack --ctstate ESTABLISHED     -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^#SMTP_PORT=.*/SMTP_PORT=$smtpPort/" $LOCAL_IPTABLE_FILE
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	$SED "s/^#\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT.*/\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^#\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT.*/\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT -m conntrack --ctstate ESTABLISHED     -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^relayhost =.*/relayhost =/" $POSTFIX_CONF_FILE
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	$SED "s/^smtp_tls_security_level =.*/smtp_tls_security_level = may/g" $POSTFIX_CONF_FILE
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	$SED "s/^smtp_tls_wrappermode =.*/smtp_tls_wrappermode = no/g" $POSTFIX_CONF_FILE
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	$SED "s/^myhostname =.*/myhostname = $hostName.$domainName/g" $POSTFIX_CONF_FILE
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	[ -e ${SASLPATH}/sasl_passwd ] && rm -f ${SASLPATH}/*
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elif [[ $TYPE_MAIL -eq 2 ]]; then # Enable mail service (relaying to an extern mail server)
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	$SED "s/^MAIL=.*/MAIL=on/" $CONF_FILE
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	$SED "s/^MAIL_TYPE=.*/MAIL_TYPE=2/" $CONF_FILE
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	$SED "s/^MAIL_SMTP_IP=.*/MAIL_SMTP_IP=$smtpIP/" $CONF_FILE
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	$SED "s/^MAIL_SMTP_PORT=.*/MAIL_SMTP_PORT=$smtpPort/" $CONF_FILE
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	$SED "s/^MAIL_ADDR=.*/MAIL_ADDR=/" $CONF_FILE
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	$SED "s/^MAIL_WHITEDOMAIN=.*/MAIL_WHITEDOMAIN=$whiteDomain/" $CONF_FILE
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	$SED "s/^MAIL_ADMIN=.*/MAIL_ADMIN=$adminMail/" $CONF_FILE
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	$SED "s/^SMTP_IP=.*/SMTP_IP=$smtpIP/" $LOCAL_IPTABLE_FILE
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	$SED "s/^SMTP_PORT=.*/SMTP_PORT=$smtpPort/" $LOCAL_IPTABLE_FILE
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	$SED "s/^\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT.*/\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT -d \$SMTP_IP -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT.*/\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT -s \$SMTP_IP -m conntrack --ctstate ESTABLISHED     -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^#SMTP_IP=.*/SMTP_IP=$smtpIP/" $LOCAL_IPTABLE_FILE
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	$SED "s/^#SMTP_PORT=.*/SMTP_PORT=$smtpPort/" $LOCAL_IPTABLE_FILE
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	$SED "s/^#\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT.*/\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT -d \$SMTP_IP -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^#\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT.*/\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT -s \$SMTP_IP -m conntrack --ctstate ESTABLISHED     -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^relayhost =.*/relayhost = [$smtpIP]:$smtpPort/g" $POSTFIX_CONF_FILE
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	$SED "s/^smtp_tls_security_level =.*/smtp_tls_security_level = may/g" $POSTFIX_CONF_FILE
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	$SED "s/^smtp_tls_wrappermode =.*/smtp_tls_wrappermode = no/g" $POSTFIX_CONF_FILE
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	$SED "s/^myhostname =.*/myhostname = $hostName.$domainName/g" $POSTFIX_CONF_FILE
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	[ -e ${SASLPATH}/sasl_passwd ] && rm -f ${SASLPATH}/*
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elif [[ $TYPE_MAIL -eq 3 ]]; then # Enable mail service (using an email address)
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	$SED "s/^MAIL=.*/MAIL=on/" $CONF_FILE
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	$SED "s/^MAIL_TYPE=.*/MAIL_TYPE=3/" $CONF_FILE
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	$SED "s/^MAIL_SMTP_IP=.*/MAIL_SMTP_IP=$smtpIP/" $CONF_FILE
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	$SED "s/^MAIL_SMTP_PORT=.*/MAIL_SMTP_PORT=$smtpPort/" $CONF_FILE
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	$SED "s/^MAIL_ADDR=.*/MAIL_ADDR=$mailAddr/" $CONF_FILE
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	$SED "s/^MAIL_WHITEDOMAIN=.*/MAIL_WHITEDOMAIN=$whiteDomain/" $CONF_FILE
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	$SED "s/^MAIL_ADMIN=.*/MAIL_ADMIN=$adminMail/" $CONF_FILE
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	$SED "s/^SMTP_IP=.*/SMTP_IP=$smtpIP/" $LOCAL_IPTABLE_FILE
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	$SED "s/^SMTP_PORT=.*/SMTP_PORT=$smtpPort/" $LOCAL_IPTABLE_FILE
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	$SED "s/^\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT.*/\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT.*/\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT -m conntrack --ctstate ESTABLISHED     -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^#SMTP_IP=.*/SMTP_IP=$smtpIP/" $LOCAL_IPTABLE_FILE
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	$SED "s/^#SMTP_PORT=.*/SMTP_PORT=$smtpPort/" $LOCAL_IPTABLE_FILE
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	$SED "s/^#\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT.*/\$IPTABLES -A OUTPUT -p tcp --dport \$SMTP_PORT -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^#\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT.*/\$IPTABLES -A INPUT  -p tcp --sport \$SMTP_PORT -m conntrack --ctstate ESTABLISHED     -j ACCEPT/" $LOCAL_IPTABLE_FILE
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	$SED "s/^relayhost =.*/relayhost = [$smtpIP]:$smtpPort/g" $POSTFIX_CONF_FILE
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	$SED "s/^smtp_tls_security_level =.*/smtp_tls_security_level = encrypt/g" $POSTFIX_CONF_FILE
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	if [ "$smtpPort" = "465" ]; then # wrappermode is madatory only if port = 465
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		$SED "s/^smtp_tls_wrappermode =.*/smtp_tls_wrappermode = yes/g" $POSTFIX_CONF_FILE
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	else
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		$SED "s/^smtp_tls_wrappermode =.*/smtp_tls_wrappermode = no/g" $POSTFIX_CONF_FILE
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	fi
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	$SED "s/^myhostname =.*/myhostname = alcasar.net/g" $POSTFIX_CONF_FILE # use the alcasar domain name to avoid extern smtp servers reject
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	[ -d ${SASLPATH} ] || mkdir ${SASLPATH}
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	echo "[${smtpIP}]:${smtpPort} ${mailAddr}:${mailMdp}" > ${SASLPATH}/sasl_passwd
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	postmap ${SASLPATH}/sasl_passwd
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	chmod -R 644 ${SASLPATH}
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	chown root:root ${SASLPATH}/sasl_passwd*
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	chmod 0600 ${SASLPATH}/sasl_passwd*
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else
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	echo "Erreur ! Aucun type de messagerie sélectionné !"
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	exit 0
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fi
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/usr/local/bin/alcasar-iptables.sh
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systemctl restart postfix.service
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exit 0