how to send gmail using nodemailer (solution of less secure app deprecated)

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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",
      text: "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

enter image description here

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

enter image description here

What do I have to do , then?

nodemailer express node.js smtp gmail
1 Answers

I finally resolved by myself!.

Google no longer supports less secure app feature from 05/20/2022. 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/

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