Error: Invalid login: 535 5.7.3 Authentication unsuccessful [BMXPR01CA0002.INDPRD01.PROD.OUTLOOK.COM]

Question

et transporter = nodemailer.createTransport({
// service: 'outlook',
host: 'smtp-mail.outlook.com',
port: 587, // port for secure SMTP
secure: false,
tls: {
ciphers: 'SSLv3'
},
auth: {
type: 'OAuth2',
user: 'user@harsh.com .com',
accessToken: 'EwAoA+l3BAAU0+FyEzrGK6gRIXxWPxCw8ZPo0GUAAddtjPcZsK+18xMS7TUDZJr/zoGX3oauo4Z1cpYjHaUTgz+ZzVOrd/iKd+tGSJbybl745bvdiVFOYxMNGiLSZXyAKhBcyKujhNbteh8Qd1XvNIWG4I0xqf73kOlUZVGMuk7Ab5lmUaK026B+yKuo6RUZH+CnCOUe0zaLuCPW9LlnxHtEY1scr+TXnyKjqwqDrrAzmoyPBRq5Zm6clzBFnS5853dPYo9/Voh2+1bPxt0hhED29uAwHWuxR4ibbPhF+J2wjaB11DcrTOM1a39mNkf1SGxIlyb0VPAaqqQJT2lIc+uhujIZEwBHbOJOvSuygqr67m+G8tvg0fxaL56XUpcDZgAACBppVBQRk3fo+AE8ls26DzmihVuPpnfWt0Fbb3pZZhGNQgKJxUKvEsgrAaUqh/j15ul+4x+iRlP03u76cYwq8OMpcuVF7XVTmFXJtkQioySaCEZu3hXYHjCfc4VdizCUyjQXnW50z0Z9K+7euXzDv3cw3G2KOg0XtA9W06FbJ8lE71xljCJkMAqD6gJo8eAx5SVnuZhROb4KafFA6NLj9PwNMvWHuF9NRro5/WWWCxdWvvTKtWBDqgp0csIcizzZYr1t4rKposIGTKxy6Na9LG7xv7ee54MNHSq6bDMWLLDWqbdsuBiosl1BBnLd+k5WcSwfR+vv/Bm1W42vuARH4ygAEHXU5o8WxGI7g2vnq/tZ/eqYQMmb1q3SXBm3wZYdmBXkFB9M4bejnJCoUFhDp/jFvNNAwzJkzT5agQ1qM/s2UTToYwVg6vQ3x61oSalDGMbJ+vGgAbqW23P9E3fjYG0BUelDJdT8r5Y4XkoVLtTSAC+UJIgY7oDShzuqSqYJ1rqRXiswfUbOk8YXUiTKXiryOW+ByBiMzf2mWTZMOaIAhMDpN1tPXDBxTOS1vQzB7P8oFhYcrTijPIZezYmdCCAF9pJpKUb6KRMPsyYj+ZzzGoXqrBKRy2J0SSU94k/VaojEhr2AiUOoMw1YOa98POd2jKbZbxpXNwIiNVT2AShCVK85Ag=='
}
});

ejs.renderFile(__dirname + "/views/pages/temp.ejs", { data: data }, function (err, data) {  
    if (err) {  
        console.log(err);  
    } else {  
        var mailOptions = {  
            from: body.email,  
            to: body.to,  
            subject: body.subject,  
            text: ``,  
            html: data  
        };  

        transporter.sendMail(mailOptions, function (error, info) {  
            if (error) {  
                console.log(error);  
            } else {  
                console.log('Email sent: ' + info.response);  
            }  
        });  
    };  
})  

I am getting this error with oauth2 as when i am using it without auth2 with ejail and password it is working fine but not working with oauth2

Answer 1

Hi @Shubham ,
In order to better solve this issue, I want confirm the following points:
What is your email account type?
How did you send the email?
How did you get the error message？

If you enable the authenticated client SMTP submission(SMTP AUTH), SMTP AUTH doesn't support modern authentication (Modern Auth), and only uses basic authentication.
For more information you could refer to: Enable or disable authenticated client SMTP submission (SMTP AUTH) in Exchange Online

----------

If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Answer 2

Error sending email: Error: Invalid login: 535 5.7.3 Authentication unsuccessful [PN2PR01CA0076.INDPRD01.PROD.OUTLOOK.COM 2023-09-22T12:34:03.188Z 08DBBAC9AE78B1D7]

Where do i am doing wrong ?

// Define the function for sending SMTP email with OAuth 2.0 authentication
const sendEmailWithOAuth2 = async (req, res) =>{
  // Set up Microsoft Identity Platform (MSAL) client
  const msalConfig = {
    auth: {
      clientId: '591a9a4f-3fb0-4f12-987e-ea6120e747f0',
      authority: 'https://login.microsoftonline.com/76151ff0-c1a1-441c-8aeb-ef2333d01ed7',
      clientSecret: 'XXXXXXXXXXXXXXXXXINa8Q~Qc0X~',
    },
  };

  const cca = new ConfidentialClientApplication(msalConfig);

  // Define the scopes required for sending emails via Outlook
  const scopes = ['https://outlook.office365.com/.default'];

  // Acquire a token
  let accessToken;

  try {
    const tokenResponse = await cca.acquireTokenByClientCredential({
      scopes,
    });
    accessToken = tokenResponse.accessToken;
    console.log("accessToken-----------------");
    console.log(accessToken);
  } catch (error) {
    console.error('Error acquiring token:', error);
    return;
  }

  // Set up the transport
  const transport = nodemailer.createTransport({
    host: 'smtp.office365.com',
    port: 587, // TLS
    secure: false, // Upgrade to TLS
    auth: {
      type: 'OAuth2',
      user: 'support.p2e@yuwaah.org',
      clientId: '-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx0e747f0',
      accessToken
      pass: 'qncgdbqywcjbypsn',
    },
    tls: {
      ciphers: 'SSLv3', // Specify the desired SSL/TLS version (e.g., SSLv3)
    },
  });

  // Send an email
  const mailOptions = {
    from: 'support.p2e@yuwaah.org',
    to: 'payertrust@gmail.com',
    subject: 'Test Email',
    text: 'This is a test email sent from Node.js using Outlook SMTP.',
  };

  try {
    const info = await transport.sendMail(mailOptions);
    console.log('Email sent:', info.response);
    res.send(info.response);

  } catch (error) {
    console.error('Error sending email:', error);
  }
}

Where do i am doing wrong ?