how to send gmail using nodemailer

Question

I am trying to send mail using nodemailer node module and configured like this.

  ... config.js ...
  smtp: {
    host: "smtp.gmail.com",
    port: 465,
    secure: true,
    auth: {
      user: "***@gmail.com",
      pass: "****"
    }
  }
  ... mail.js ...
  const config = require("../config");
  const nodemailer = require('nodemailer');
  const transporter = nodemailer.createTransport(config.smtp);

  const sendEmail = async (data, res) => {
    // if(!data.to || !data.subject)
    //     return false;
    
    data = { ...data, from: config.smtp.auth.user };
    console.log(data)
    transporter.sendMail(data, (error, info) => {
        console.log(error);
        res.send(error);
    });
    res.send(true)
  }

  module.exports = sendEmail;

  ... controller ...
  router.get('/testEmail', async (req, res) => {
    let emailData = {
      to: "***@gmail.com",
      subject: "Welcome to Musical World",
      content: "test test"
    };
    let result = sendEmail(emailData, res);
    console.log(result)
    // res.send(result);
  })

When I try to send email, it returns

{"code":"EAUTH","response":"535-5.7.8 Username and Password not accepted. Learn more at\n535 5.7.8  https://support.google.com/mail/?p=BadCredentials p25-20020a056638217900b0033c14d2386bsm898629jak.75 - gsmtp","responseCode":535,"command":"AUTH PLAIN"}

So I did googling and found that's why I didn't turn on less secure app in my google account. But when I went there, google said

I tried to turn on less secure apps , but G less secure apps feature isn't available.

What do I have to do , then?

Answer 1

I finally resolved by myself!.

Google no longer supports less secure app feature from 03/20/2022. It will help other developers who get stuck with this issue.

So we can't access to gmail using only emal and password . Instead we have to use OAuth2 to get access to gmail.

... config.js ...
  smtp: {
    service: "gmail",
    auth: {
      type: "OAuth2",
      user: "*****@gmail.com",
      pass: "******",
      clientId: "********",
      clientSecret: "***********",
      refreshToken: "************"
    }
  }

You have to have OAuth2 client in your google cloud console for this. Here's full details you can refer to.

https://www.freecodecamp.org/news/use-nodemailer-to-send-emails-from-your-node-js-server/