External SMTP relay enabler

#!/bin/sh
## External (remote) smtp relay enabler ## airwolfx86
## info@binarisk.com
## FOR POSTIFX
LOOP=1
unset OPTION1
unset RELAYHOST
unset USERNAME
unset PASSWORD
OPTION2=$1
DATEXT=$(date +"%T")
if [ $OPTION2 = "config" ]
    then
        clear
        while [ $LOOP -gt 0 ]; do
            echo "Your remote SMTP server IP :"
            read RELAYHOST
            echo "Your remote SMTP username :"
            read USERNAME
            echo "Your remote SMTP password :"
            read -s PASSWORD
            echo " "
            echo "Now you will save this information to the postfix service:"
            echo "[Server]: $RELAYHOST [Username]: $USERNAME [Password]: $PASSWORD"
            echo " "
            echo "Save and exit (YES) / Retry (R) / Quit (Q) :"
            read OPTION1
            if [ "$OPTION1" = "YES" ] || [ "$OPTION1" = "yes" ] || [ "$OPTION1" = "Y" ] || [ "$OPTION1" = "y" ]
                then
                    cp /etc/postfix/main.cf "/etc/postfix/main_cf_$DATEXT" # main.cf backup
                    cp /etc/postfix/sasl_passwd "/etc/postfix/sasl_passwd_$DATEXT" # sasl_passwd backup
                    postconf -e "relayhost = $relayhost"
                    postconf -e "smtp_sasl_auth_enable = yes"
                    postconf -e "smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd"
                    postconf -e "smtp_sasl_security_options ="
                    echo "$relayhost $username:$password" >> /etc/postfix/sasl_passwd
                    chown root:root /etc/postfix/sasl_passwd
                    chmod 600 /etc/postfix/sasl_passwd
                    postmap /etc/postfix/sasl_passwd # create postfix passwd db
                    /etc/init.d/postfix restart
                    clear
                    echo "Your backup files main.cf and sasl_passwd are stored with date and time"
                    echo "Done..."
                    LOOP=0
            fi
            if [ "$OPTION1" = "R" ] || [ "$OPTION1" = "r" ]
                then
                    clear
                    LOOP=1
            fi
            if [ "$OPTION1" = "Q" ] || [ "$OPTION1" = "q" ]
                then
                    clear
                    echo "No changes where made..."
                    LOOP=0
            fi
        done
        exit
fi
if [ $OPTION2 = "help" ]
    then
        clear
        echo "[ Remote SMTP Postfix Help ]"
        echo "You must have POSTFIX installed"
        echo "A valid email username / password in the remote smtp server"
        exit
fi
clear
        echo "Usage : backupcode-relay config | help "
exit