In Outlook for Nodemailer, enable SMTP.

Fix Outlook's SMTP Authentication Problems

Script for Node.js to Enable SMTP

// Import the Nodemailer module
const nodemailer = require('nodemailer');

// Create a transporter object using SMTP transport
const transporter = nodemailer.createTransport({
  host: 'smtp.office365.com',
  port: 587,
  secure: false, // true for 465, false for other ports
  auth: {
    user: 'your-email@outlook.com', // your Outlook email
    pass: 'your-password', // your Outlook password
  },
});

// Send email function
transporter.sendMail({
  from: '"Sender Name" <your-email@outlook.com>',
  to: 'recipient@example.com',
  subject: 'Hello from Node.js',
  text: 'Hello world!',
  html: '<b>Hello world!</b>',
}, (error, info) => {
  if (error) {
    return console.log(error);
  }
  console.log('Message sent: %s', info.messageId);
});

How to Set Up SMTP in Outlook for Nodemailer

Script in PowerShell to Allow SMTP

# Connect to Exchange Online
$UserCredential = Get-Credential
Connect-ExchangeOnline -UserPrincipalName $UserCredential.UserName -Password $UserCredential.Password

# Enable SMTP AUTH for the entire tenant
Set-TransportConfig -SmtpClientAuthenticationDisabled $false

# Verify if SMTP AUTH is enabled
Get-TransportConfig | Format-List SmtpClientAuthenticationDisabled

# Enable SMTP AUTH for a specific mailbox
Set-CASMailbox -Identity 'user@domain.com' -SmtpClientAuthenticationDisabled $false

# Disconnect from Exchange Online
Disconnect-ExchangeOnline -Confirm:$false

Common Questions regarding Turning on SMTP in Nodemailer

1. In Outlook, how can I enable SMTP authentication?
2. Through the Office 365 admin site, you may enable SMTP authentication in Outlook by going to the SMTP settings for your account and making sure the SmtpClientAuthenticationDisabled property is set to false.
3. Why is my tenant's SMTP authentication disabled?
4. Usually, this option is turned off by default for security concerns. For email clients such as Nodemailer to send emails, an administrator must enable it.
5. What port does Outlook use by default for SMTP?
6. Outlook uses port 587 by default for SMTP, which is used for secure email submission.
7. Is Nodemailer compatible with other email providers?
8. It is possible to set up Nodemailer to function with a variety of email services, including Gmail, Yahoo, and bespoke SMTP servers, by modifying the transporter settings appropriately.
9. How can I fix Nodemailer authentication errors?
10. Make sure you have the most recent versions of Node.js and Nodemailer installed, that SMTP is enabled in your account settings, and that your credentials are accurate. Verify the firewall and network settings as well.

Concluding the SMTP Setting Up

It is necessary to comprehend both client and server settings in order to enable SMTP in Outlook for Nodemailer. This procedure is made easier by the included PowerShell and Node.js scripts, which configure the required variables and make sure SMTP authentication is turned on. These steps will help you get around typical authentication failures and make sure that your Node.js applications are able to send messages over your Outlook account without any problems. Updating your software frequently and double-checking your settings are essential for keeping your email setup working.