Nodemailer: ECONNREFUSED

ECONNREFUSED inidcates that this is some kind of connection or firewall issue.

Can you connect to smtp.gmail.com port 465 with any other application from the same machine, for example with openssl?

openssl s_client -connect smtp.gmail.com:465

I was also using a gmail account to send the email, you might need an Application-specific password from google to allow nodemailer to work properly.

https://support.google.com/mail/answer/1173270?hl=en

Following step:

1. Login gmail account.

2. Enable pop3 in settings tabs

3. Enable less secure apps at: Enable less secure apps for gmail account

4. Display Unlock Captcha at: Display unlock Captcha

5. Defined email option and sending

   var mailOptions = {
       host: 'smtp.gmail.com',
       port: 465,
       secure: true, // use SSL
       auth: {
           user: '[email protected]',
           pass: 'password'
       }
   }    
   
   mailer = nodemailer.createTransport(mailOptions);
   
   mailer.sendMail({
   ....
   }, function(err, response) {
           if (err) {
                console.log(err);
           }
           console.log(response);
   });
   

Hope this block code help you.

It was a firewall issue. Turns out there was nothing wrong with the code, I just didn't understand what the error message implied.