Exim/mailserver.sh

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#!/usr/bin/env bash
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usage(){
echo "usage: ./mailserver.sh [help] [install]"
echo "help: show this help"
echo "install: install exim/courier mail server"
}
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RED="\e[91m"
GRE="\e[92m"
YEL="\e[93m"
STD="\e[0m"
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[[ $# -lt 1 ]] && usage
[[ $1 == "help" ]] && usage
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[[ $EUID -ne 0 ]] && echo -e "${RED}This script must be run as root.${STD}" && exit 1
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install_ask_domain() {
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echo -e "${GRE}Please enter the mail server's main domain${STD}"
read choice
[[ -n $choice ]] && echo $choice > /etc/mailname
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[[ -z $choice ]] && install_ask_domain
}
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install_exim() {
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install_ask_domain
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echo -e "${YEL}Two boxes will appear. Hit [Enter] each time to continue.${STD}"
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read -p "Press [Enter] key to continue..."
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aptitude -y install exim4 courier-imap courier-imap-ssl courier-pop courier-pop-ssl courier-authlib-userdb ssl-cert
chown -fvR daemon: courier/*
cp -fv courier/* /etc/courier/
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chown -vR $USER: courier/*
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mkdir -pv /etc/exim.domains
mkdir -pv /etc/exim.forward
cp -fv exim4/* /etc/exim4/
chmod -fv 777 /var/run/courier/authdaemon/socket
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/usr/share/doc/exim4-base/examples/exim-gencert
openssl genrsa -out /etc/exim4/dkim.key 2048
install_restart
gen_public_dns
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}
install_spamassassin() {
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aptitude -y install exim4-daemon-heavy sa-exim spamassassin
cp -fv spamd/sa-learn /etc/cron.daily/sa-learn
cp -fv spamd/spamassassin /etc/default/spamassassin
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systemctl enable spamassassin
service spamassassin restart
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install_restart
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}
install_clamav() {
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aptitude -y install exim4-daemon-heavy clamav clamav-daemon
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adduser clamav Debian-exim
systemctl enable clamav-daemon
service clamav-daemon restart
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install_restart
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}
install_restart() {
service courier-authdeamon restart
service courier-imap restart
service courier-pop restart
service courier-imap-ssl restart
service courier-pop-ssl restart
service exim4 restart
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}
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gen_public_dns() {
DNS=$(sudo openssl rsa -in /etc/exim4/dkim.key -pubout)
DNS=$(echo ${DNS} | sed "s/ //g" | sed "s/.*Y-----\(.*\)-----E.*/\1/g")
echo -e "${YEL}Please put these pointers on your DNS provider :${STD}"
echo -e '\t\t10800 IN MX 10 <domain>'
echo -e '\t\t10800 IN TXT "v=spf1 a -all"'
echo -e '_domainkey\t10800 IN TXT "o=~; r=postmaster@<domain>"'
echo -e "x._domainkey\t10800 IN TXT \"v=DKIM1; k=rsa; p=${DNS}\""
echo -e '_dmarc\t\t10800 IN TXT "v=DMARC1; p=quarantine"'
read -p "Press [Enter] key to continue..."
}
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install_mailserver() {
echo "Do you want to install extra software ?"
echo "1. None"
echo "2. SpamAssassin (antispam)"
echo "3. ClamAV (antivirus)"
echo "4. Both SpamAssassin and ClamAV"
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echo "5. Show DNS config"
echo "6. Exit"
read -p "Enter choice [1 - 6] " choice
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case $choice in
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1) install_exim ;;
2) install_exim && install_spamassassin ;;
3) install_exim && install_clamav ;;
4) install_exim && install_spamassassin && install_clamav ;;
5) gen_public_dns ;;
6) exit ;;
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*) clear && echo -e "${RED}Please enter a valid input${STD}" && install_mailserver ;;
esac
}
clear && [[ $1 == "install" ]] && install_mailserver