Error: self signed certificate in certificate chain, Node.js Mail Sender

Error: self signed certificate in certificate chain, Node.js Mail Sender

I am developing node js application through which I am trying to send mail from (localhost:3000), 
but I am getting error, please help on how do I send mail using node js nodemailer and zoho smtp

( I have created Application specific password using below link
https://www.zoho.com/mail/help/adminconsole/two-factor-authentication.html#alink5 )

I am using nodemailer
Here is the code, how I am creating transporter object

  1. const nodemailer = require('nodemailer');

  3. const transporter = nodemailer.createTransport({
  4.    host: "smtp.zoho.com",,
  5.    port: 465,
  6.    secure: true,
  7.    secureConnection: false,
  8.    auth: {
  9.        user: "email@email.com",
  10.        pass: "password"
  11.    }
  12. });

  14. obj = {
  15.           from: 'valid@fromemail.com',
  16.                 to: 'valid@email.com',
  17.                 subject: 'subject',
  18.                 text: 'text',
  19.                 html: <b>Test HTML</b>
  20.             }

  22. transporter.sendMail(obj);

I got below error:
  1. { Error: self signed certificate in certificate chain
  2.    at TLSSocket.onConnectSecure (_tls_wrap.js:1055:34)
  3.    at TLSSocket.emit (events.js:198:13)
  4.    at TLSSocket.EventEmitter.emit (domain.js:448:20)
  5.    at TLSSocket._finishInit (_tls_wrap.js:633:8) code: 'ESOCKET', command: 'CONN' }

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Its giving error even If I am using non secure connection