shell script自动搭建简单的mail服务器（postfix+dovecot）

#!/bin/bash
#
#Shell name:config_mail.sh
#
#Program:
#    config mail server by this shell script
#
#Author:perofu
#
#Mail:  [email protected]
#
#History:
#    2012/10/14
#
#NOTE:
#
#Please check some right strings in your /etc/postfix/main.cf and
#/etc/dovecot/dovecot.conf to change it in this shell script,
#
#Not in below part
######################################################
#        /etc/postfix/main.cf
######################################################
#
#    #myhostname = host.domain.tld
#    #mydomain = domain.tld
#    #myorigin = $myhostname
#    #myorigin = $mydomain
#    #inet_interfaces = all
#    inet_interfaces = localhost
#    mydestination = $myhostname, localhost.$mydomain, localhost
#    #mynetworks = 168.100.189.0/28, 127.0.0.0/8
#    #relay_domains = $mydestination
#   
######################################################
#        /etc/dovecot/dovecot.conf
######################################################
#
#    #protocols = imap pop3 lmtp
#
######################################################
#If you have any opinions please contact me

PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:.
export PATH

SHELL_NAME=$(basename $0)
PC=/etc/postfix/main.cf        #postfix configuer
DC=/etc/dovecot/dovecot.conf    #dovecot configuer

if [ $UID -ne 0 ]
then
  echo "Run as root"
  exit 1
fi


if [ "$#" -ne "0" ]
then
    if [ "$#" -ne "3" ]
    then
        echo "Usage:"
        echo "A ./${SHELL_NAME}"
        echo "B ./${SHELL_NAME} hostname domain_name subnet"
        echo
        exit 77
    else
        hn=$1
        dm=$2
        sn=$3
    fi
else
    read -p "Please input your host name like [mail.example.com] " hn
    read -p "Please input your domain name like [example.com] " dm
    read -p "Please input your subnet like [10.0.0.0/24] " sn
fi

#install postfix and dovecot

yum install postfix* dovecot* -y &> /dev/null

cp $PC $PC.bak        #backup
cp $DC $DC.bak

#check some right strings in your /etc/postfix/main.cf and write in there


grep "#myhostname = host.domain.tld" $PC |sed -i "s/#myhostname = host.domain.tld/myhostname = ${hn}/" $PC
grep "#mydomain = domain.tld" $PC |sed -i "s/#mydomain = domain.tld/mydomain = ${dm}/" $PC
grep "#myorigin = \$myhostname" $PC |sed -i "s/#myorigin = \$myhostname/myorigin = \$myhostname/" $PC
grep "#myorigin = \$mydomain" $PC |sed -i "s/#myorigin = \$mydomain/myorigin = \$mydomain/" $PC
grep "#inet_interfaces = all" $PC |sed -i "s/#inet_interfaces = all/inet_interfaces = all/" $PC
grep "inet_interfaces = localhost" $PC |sed -i "s/inet_interfaces = localhost/#inet_interfaces = localhost/" $PC
grep "#mynetworks = 168.100.189.0/28, 127.0.0.0/8" $PC |sed -i "s%#mynetworks = 168.100.189.0\/28, 127.0.0.0\/8%#mynetworks = ${sn}, 127.0.0.0\/8%" $PC
grep "#relay_domains = \$mydestination" $PC |sed -i "s/#relay_domains = \$mydestination/relay_domains = \$mydestination/" $PC


grep "^mydestination = $myhostname, localhost.$mydomain, localhost" /etc/postfix/main.cf |sed -i "s/^mydestination = \$myhostname, localhost.\$mydomain, localhost/mydestination = \$myhostname, \$mydomain/" /etc/postfix/main.cf

#check some right strings in your /etc/dovecot/dovecot.conf and write in there

grep "#protocols = imap pop3 lmtp" $DC |sed -i "s/#protocols = imap pop3 lmtp/protocols = imap pop3 lmtp/" $DC


#check sendmail server and stop it

if [ -e /usr/sbin/sendmail.sendmail ]
then
    /etc/init.d/sendmail stop &> /dev/null
    chkconfig sendmail off
    yes 2 | alternatives --config mta &> /dev/null
    /etc/init.d/postfix restart &> /dev/null
    chkconfig postfix on
    /etc/init.d/dovecot restart &> /dev/null
    chkconfig dovecot on

else

    /etc/init.d/postfix restart &> /dev/null
    chkconfig postfix on

#MTA
    yes 1 | alternatives --config mta &> /dev/null

    /etc/init.d/dovecot restart &> /dev/null
    chkconfig dovecot on
fi

echo "Enjoin mail-server"
grep "^mydestination = $myhostname, localhost.$mydomain, localhost" /etc/postfix/main.cf |sed -i "s/^mydestination = \$myhostname, localhost.\$mydomain, localhost/mydestination = \$myhostname, \$mydomain/" /etc/postfix/main.cf