This is an example script that Nagios could use to send email notifications to contacts bound to alerts. See http://portalstack.blogspot.com/2012/07/sending-custom-nagios-notification.html for more information.

notify-service.coffee

#!/usr/bin/env coffee
#
# incoming argv is order sensitive
#
# [0] - coffee
# [1] - /opt/bin/notify-service.coffee
# [2] - hostname
# [3] - service
# [4] - IP address
# [5] - notification type [ PROBLEM, RECOVERY, OK ] 
# [6] - status [ OK, WARNING, CRITICAL ]
# [7] - long date time
# [8] - service output

require 'coffee-script'
nodemailer = require 'nodemailer'
jade       = require 'jade'

argvObject =
  hostname:    process.argv[2]
  service:     process.argv[3]
  ip:          process.argv[4]
  notify_type: process.argv[5]
  status:      process.argv[6]
  date:        process.argv[7]
  output:      process.argv[8]


smtpTransport = nodemailer.createTransport "SMTP"

text = "Nagios requires your attention.\n
  \n
  Hostname:\t\t" + argvObject.hostname    + "\n
  service:\t\t"  + argvObject.service     + "\n
  ip:\t\t"       + argvObject.ip          + "\n
  notify:\t\t"   + argvObject.notify_type + "\n
  status:\t\t"   + argvObject.status      + "\n
  date:\t\t"     + argvObject.date        + "\n
  output:\t\t"   + argvObject.output      + "\n
  "


jade.renderFile '/opt/bin/jade/nagiosAlert.jade', argvObject, (err, html)->
  if err
    console.log err


  mailOptions =
    from: "Nagios <[email protected]>"
    to: "[email protected]"
    subject: argvObject.hostname + "'s " + argvObject.service +
      " IS " + argvObject.status
    text: text
    html: html

  smtpTransport.sendMail mailOptions, (err, res) ->

    if err
      console.log err


    process.exit()