var nodemailer = require('nodemailer');

 var transporter = nodemailer.createTransport({
 service: 'gmail',
 port:'465',
 secure: 'false',
 auth: {
    user: 'my_id',
    pass: 'my_password'
},
 tls: {
     rejectUnauthorized: false
}
});

var mailOptions = {
    from: 'myemail',
    to: receiver's email,
    subject: "some text",
    text: "some text"
};

 transporter.sendMail(mailOptions, function(error, info){
 if (error) {
console.log(error);
} else {
console.log('Email sent: ' + info.response);
}
  });

{ Error: connect ECONNREFUSED 74.125.124.109:465
at Object.exports._errnoException (util.js:1026:11)
at exports._exceptionWithHostPort (util.js:1049:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1085:14)
code: 'ECONNECTION',
errno: 'ECONNREFUSED',
syscall: 'connect',
address: '74.125.124.109',
port: 465,
command: 'CONN' }