Username and Password not accepted when using nodemailer?

This is my settingController:

var sendSmtpMail = function (req,res) {
  var transport = nodemailer.createTransport({
  service:'gmail',
   auth: {
             user: "[email protected]",
             pass: "qwerr@wee"
        }
   });
   var mailOptions = {
        from: "[email protected]", 
        to:'[email protected]', 
        subject: req.body.subject+"nodejs working ?", 
        text: "Hello world ?",  
    }
    transport.sendMail(mailOptions, function(error, response){
      if(error){
         res.send("Email could not sent due to error: "+error);
         console.log('Error');
       }else{
         res.send("Email has been sent successfully");
         console.log('mail sent');
      } 
  }); 

in postman I got the error like that:

Email could not sent due to error:

Error: Invalid login: 535-5.7.8 Username and Password not accepted. Learn more at 535 5.7.8  https://support.google.com/mail/?p=BadCredentials g7sm64435626pfj.29 - gsmtp

Update (2022-05-02)

As mentioned in the comments and directly quoted from google:

> On May 30 2022, you may lose access to apps that are using less secure > sign-in technology

So the bottom code will probably stop working with Gmail. The solution is to enable 2-Step Verification and generate Application password, then you can use the generated password to send emails using nodemailer.To do so you need to do the following:

1. Go to your google account at https://myaccount.google.com/
2. Go to Security
3. In "Signing in to Google" section choose 2-Step Verification - here you have to verify yourself, in my case it was with phone number and a confirmation code send as text message. After that you will be able to enabled 2-Step Verification
4. Back to Security in "Signing in to Google" section choose App passwords
5. From the Select app drop down choose Other (Custom name) and put a name e.g. nodemailer
6. A modal dialog will appear with the password. Get that password and use it in your code.

> If there is still a problem, try clearing captcha by visiting https://accounts.google.com/DisplayUnlockCaptcha from your google account.

Sample usege

const nodemailer = require('nodemailer');

const transporter = nodemailer.createTransport({
    service: 'gmail',
    auth: {
        user: 'YOUR-USERNAME',
        pass: 'THE-GENERATED-APP-PASSWORD'
    }
});

send();

async function send() {
    const result = await transporter.sendMail({
        from: 'YOUR-USERNAME',
        to: 'RECEIVERS',
        subject: 'Hello World',
        text: 'Hello World'
    });

    console.log(JSON.stringify(result, null, 4));
}

Old Answer (before 2022-05-02)

I think that first you need to Allow less secure apps to access account setting in your google account - by default this settings is off and you simply turn it on. Also you need to make sure that 2 factor authentication for the account is disabled. You can check how to disable it here.

Then I use the following script to send emails from a gmail account, also tested with yahoo and hotmail accounts.

const nodemailer = require('nodemailer');

let transporter = nodemailer.createTransport({
    host: 'smtp.gmail.com',
    port: 587,
    secure: false,
    requireTLS: true,
    auth: {
        user: '[email protected]',
        pass: 'your.password'
    }
});

let mailOptions = {
    from: '[email protected]',
    to: '[email protected]',
    subject: 'Test',
    text: 'Hello World!'
};

transporter.sendMail(mailOptions, (error, info) => {
    if (error) {
        return console.log(error.message);
    }
    console.log('success');
});

If you put the previous code in send-email.js for example, open terminal and write:

node send-email

You should see in the console - success, if the email was send successfully or the error message returned by nodemailer

Don't forget to first do the setting - Allow less secure apps to access account.

I hope this code will be useful for you. Good Luck!

If you have enabled 2-factor authentication on your Google account you can't use your regular password to access Gmail programmatically. You need to generate an app-specific password and use that in place of your actual password.

Steps:

• Log in to your Google account
• Go to My Account > Sign-in & Security > App Passwords
• (Sign in again to confirm it's you)
• Scroll down to Select App (in the Password & sign-in method box) and choose Other (custom name)
• Give this app password a name, e.g. "nodemailer"
• Choose Generate
• Copy the long generated password and paste it into your Node.js script instead of your actual Gmail password. (You don't need the spaces.)

Your script will now look like this:

var transporter = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    user: '[email protected]',
    pass: 'YOUR-GENERATED-APP-PASSWORD'
  }
});

I hope this helps someone.

https://myaccount.google.com/lesssecureapps if it is OFF, turn it ON to enable lesssecureapps. (i had same issue turn it on resolve my issue)

Make sure you are using the right port: ie port: 587 as of now.

Visit this link to allow Less secure App access: https://myaccount.google.com/lesssecureapps

Enable the recaptcha at this link: https://accounts.google.com/b/0/DisplayUnlockCaptcha

Wait for a few minutes and try to send an email.

Alternatively use sendgrid. It has a free version.

If you are not seeing the emails in your inbox, check the Spam folder.

I encountered the same problem, i solved it as follows:

1. GOTO https://admin.google.com and Login with the main account you used for setting up the business account and create users. Remember to use the main Email ID.

2. Click on the Security Icon and you'll be taken to this page where you'll see Less secure apps section, click on it.

3. Now You'll see this, allow users or give permission here.

4. And you're not done yet, Not Go to the below link: https://myaccount.google.com/u/1/lesssecureapps

Now you'll see the switch. Enable it and try it'll definitely work.

Peace :)

You have to allow Less-Secure-Apps to access account settings in your google account - by default, this setting is off and you can simply turn it on. Image example

There are some account settings that are necessary for you to send through it using SMTP.

If you have two-step verification enabled on the account, you will need to use an application specific password (created in the Gmail account) in the device settings: Signing in using application-specific passwords

If not, please try this: sign into the Gmail account using a web browser at https://mail.google.com, then go to Settings > Accounts and Import > Other Google Account settings. Under Security, scroll down and enable access for less secure apps. This setting is required to enable SMTP, POP or IMAP access.

If there is still a problem, try clearing Captcha: visit https://accounts.google.com/DisplayUnlockCaptcha and sign in with the Gmail username and password. If necessary (it's usually not), enter the letters in the distorted picture then press Continue. This will allow ten minutes for the device to register as an approved connection. Note that you must use the account you are trying to add to the device - if the browser is already signed into another account, you must sign out first. Also, you must trigger the device to make a connection within ten minutes of pressing Continue.

Explanation from Google Support team

You are using gmail service so your mail must be in gmail:

var transport = nodemailer.createTransport({
service:'gmail',
 auth: {
             user: "[email protected]",
             pass: "qwerr@wee"
        }
    });
var mailOptions = {
        from: "[email protected]", 
        to:'[email protected]', 
        subject: req.body.subject+"nodejs working ?", 
        text: "Hello world ?",  
    }
transport.sendMail(mailOptions, function(error, response){
    if(error){
         res.send("Email could not sent due to error: "+error);
         console.log('Error');
    }else{
         res.send("Email has been sent successfully");
         console.log('mail sent');
    } 
});