Unable to send a email using nodemailer - Invalid login error

I am relatively new to Node.js and Digitalocean. I have a website hosted on digitalocean - The domain name was registered with GSuite. I want to send a verification email from to a gmail address, say

I tried using the nodemailer module for this. When I try to send an email from my my own gmail address I can send the verification link to any email account. But when I try to send an email from ‘’, I get ‘Invalid login’ error in the log files.

I use the following code to send the email:

var code="*******";
var nodemailer = require('nodemailer');

var transporter = nodemailer.createTransport({
      service: 'gmail',
      auth: {
        user: '',
        pass: 'password'
    var mailOptions = {
      to: mail,
      subject: 'Verify your account',
      text: 'Veify your account',
        html: " <a href='"+code+"'>"+code+"  </a> "
    transporter.sendMail(mailOptions, function(error, info){
      if (error) {
      } else {
        console.log('Email sent: ' + info.response);

This is the error message in the log file:

Error: Invalid login.
Please log in via your web browser and then try again.
Learn more at

Any help would be appreciated…

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Hey, I have also experienced the same issue earlier today and enabling UnlockCaptcha has resolved this issue, ( try enabling this option to your Gmail account which you’re using in nodemailer.

I am also experiencing the same problem. any change we can escalate this?

Hi - I see this post is old, but I am experiencing the same issue . Any suggestion? Thanks!