Transmission torrent done email notification on OS6

I solved it by myself.

Here is the steps

1. turn off the Transmission app on Web-GUI.

2. edit :  nano /etc/init.d/transmission

3. find USERNAME=guest:guest and change it to root:root.

4. create a email alert script :  nano /data/Transmission/config/email_alert

#!/bin/sh
NAIL=/usr/bin/nail
SMTP_SERVER=smtp.orange.fr
SUBJECT="Torrent Done!"

if [ -f /etc/frontview/alert.conf ]; then
 EmailTo=`/bin/grep "email" /etc/frontview/alert.conf | /usr/bin/awk -F '!!' '{ print $2 }' | /usr/bin/awk -F ',' '{ print $1 " " $2 " " $3 }'`
else
 EmailTo=`/bin/grep "email" /frontview/conf/alert.conf | /usr/bin/awk -F '!!' '{ print $2 }' | /usr/bin/awk -F ',' '{ print $1 " " $2 " " $3 }'`
fi
    if [ "$(readlink `which sendmail`)" = "/usr/bin/msmtp" ]; then
    EmailFrom=`/bin/grep '^from' /etc/msmtprc | /usr/bin/cut -f2 -d' '`
    else
    EmailFrom=`/bin/echo $EmailTo | awk '{ print $1 }'`
    fi
    echo "From:$EmailFrom To:$EmailTo"
    # Create the email message
    EmailFile=/tmp/tmp_email.txt
    if [ -f "$EmailFile" ]; then
    rm -f $EmailFile
    fi
    touch $EmailFile
    # Create the message headers
    echo "Date: `date -R`" >> $EmailFile
    echo "From: $EmailFrom" >> $EmailFile
    echo "To: $EmailTo" >> $EmailFile
    echo "Subject:Torrent Done!" >> $EmailFile
    echo "MIME-Version: 1.0" >> $EmailFile
    echo "Content-Type: text/plain; charset=ISO-8859-1" >> $EmailFile
    echo "" >> $EmailFile
    # Create the message body
    /bin/echo "Hostname: $(hostname)" >> $EmailFile
    /bin/echo "Transmission finished downloading \"$TR_TORRENT_NAME\" on $TR_TIME_LOCALTIME" >> $EmailFile
    /bin/echo "" >> $EmailFile
    /bin/echo "----------------------------------------------------------------------" >> $EmailFile
    /bin/echo "Your add-ons developer Super-Poussin" >> $EmailFile
    /bin/cat $EmailFile |/usr/sbin/sendmail -f $EmailFrom $EmailTo
    #$NAIL -v -S from="$EmailFrom" -S smtp -s "$SUBJECT" -S smtp=$SMTP_SERVER "$EmailTo" < $EmailFile
    rm -f $EmailFile

5. change file permission :  chmod 755 /data/Transmission/config/email_alert

6. edit setting file :  nano /data/Transmission/config/settings.json

7. change a value as below :

"script-torrent-done-enabled": true,
"script-torrent-done-filename": "/data/Transmission/config/email_alert",

8. Turn on Transmission app on WEB-GUI.

You will receive alert email when torrent download is done.