Not able to send emails from nodemailer with office365 account in nodejs getting error Authentication unsuccessful?

Question

I am using nodemailer to send emails to user with office 365 account email and password are all correct but every time i am getting error - Authentication unsuccessful

Error: Invalid login:Authentication unsuccessful[BL0PR01CA0033.prod.exchangelabs.com]
code: 'EAUTH',
response: '535 5.7.3 Authentication unsuccessful [BL0PR01CA0033.prod.exchangelabs.com]',
response Code: 535,
command: 'AUTH LOGIN'** 

Answer 1

You have to enable SMTP login for the O365 mail box or user in the admin settings

Go to Mail Settings

Turn On Authenticated SMTP

once that is done use

var transport = nodemailer.createTransport({
    service: "Outlook365",
    auth: {
      user: 'O365email',
      pass: 'O365password'
    }, 

  });
  var mailOptions = {
   from: 'o365email',
    to: '[email protected]', // list of receivers
    subject: "Password reset requested for your account", // Subject line
    text: 'reset password',
    html: "<h1>Mail Testing</h1>" // html body
  };
  transport.sendMail(mailOptions, function(error, response){
    if(error){
      resp.status(500);
     resp.send(error);
    }else{
        resp.send({message:'done'});
    }

    });