My requirement is that few of my critical notification mails are not delivered to my gamil and yahoo id. After further checking it has been found that those mails are treated as spam. I need all my nagios alert mails should free from spam filtration.
So I decided to use trusted SMTP server to use my nagios notification mails. Also configure postfix as relay mail server using external smtp.
This process utilizes a perl script called “sendEmail”.
1) Download from http://caspian.dotconf.net/menu/Software/SendEmail.
2) Extract the file and copy the sendEmail into /usr/local/bin.
3) chmod +x /usr/local/bin/sendEmail.
Now the setup and customization of Nagios.
1) Edit /usr/local/nagios/etc/resource.cfg – add (3) new entries.
$USER5$=email_address
$USER6$=password
$USER7$=SMTP server ip
2) Edit /usr/local/nagios/etc/objects/commands.cfg
Change command_line for command_name notify-host-by-email:
command_line /usr/bin/printf "%b" "***** Nagios *****nnNotification Type: $NOTIFICATIONTYPE$nHost: $HOSTNAME$nState: $HOSTSTATE$nAddress: $HOSTADDRESS$nInfo: $HOSTOUTPUT$nnDate/Time: $LONGDATETIME$n" | /usr/local/bin/sendEmail -s $USER7$ -xu $USER5$ -xp $USER6$ -t $CONTACTEMAIL$ -f $USER5$ -l /var/log/sendEmail -u "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" -m "***** Nagios *****nnNotification Type: $NOTIFICATIONTYPE$nHost: $HOSTNAME$nState: $HOSTSTATE$nAddress: $HOSTADDRESS$nInfo: $HOSTOUTPUT$nnDate/Time: $LONGDATETIME$n"
Change command_line for command_name notify-service-by-email:
define command{
command_name notify-service-by-email
command_line /usr/bin/printf "%b" "***** Nagios *****nnNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$i\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$" | /usr/local/bin/sendEmail -s $USER7$ -xu $USER5$ -xp $USER6$ -t $CONTACTEMAIL$ -f $USER5$ -l /var/log/sendEmail -u "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" -m "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\n\nHost: $HOSTALIAS$\n\nAddress: $HOSTADDRESS$\n\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$"
}
3) #touch /var/log/sendEmail
4) chown nagios:nagios /var/log/sendEmail
5) Now restart Nagios service
Testing:
Go into Nagios and send an alert and check the /var/log/sendEmail log file. It should say “Email was sent successfully”.
