[SOLVED] Modern Oauth2 authentication for sending mails using Nodemailer nodejs

Modern Oauth2 authentication for sending mails using Nodemailer nodejs

I am using nodemailer to send email in my nodejs application.

var payload = { auth: 
               {
                user: smtpuser,
                pass: smtppass
               },
                to : toAddr,
                from  : emailfrom,
                cc : ccAddr,
                subject : subject,
                html    : content,
                attachments: attachments
              };

var transporter = nodemailer.createTransport(
                   { host: payload.host || 'smtp.office365.com', // Office 365 server
                     port: payload.port || 587,     // secure SMTP
                     secure:payload.secure || false, // false for TLS - as a boolean not string - but the default is false so just remove this completely
                     auth: payload.auth,
                     debug: true,
                     tls: payload.tls || {ciphers: 'SSLv3'}
                   });

transporter.sendMail(payload, function (error, info) {
                if (error) {
                    return console.log(error);
                }
                updateMessage(updatedMsg);
            });

I started getting this error:

Error: Invalid log in: 535 5.7.3 Authentication unsuccessful [SN4PR0601CA0002.namprd06.prod.outlook.com]

It seems my team has now disabled basic authentication.

I need to implement modern authentication(Oauth2) to be able to send mails via nodemailer using the outlook id.

Does anyone have any idea about this? What configuration(code) changes will that require ?

Solution