'Nodemailer and Outlook 365, 535 5.7.139 Authentication unsuccessful not meet criteria

I am trying to send emails from my outlook account ( office 365 email ) to myself/ to others in my organization. And from my email to my users that may or may not be on office.

I am using Nodejs and Typescript and this is all happening on the server from my own email (our organizations email). So this should require no human interaction/ the access token or whatever shouldn't expire, need manual setting but rather this should be automatic or set once.

I tried the following setup

   const mailOptions = {
        from: "[email protected]",
        to: "[email protected]",
        subject: req.title,
        text: req.contents,
      };

      const info = await transporter.sendMail(mailOptions);

export const transporter = nodemailer.createTransport({
  service: "Outlook365",
  auth: {
    user: "[email protected]",
    pass: "pass",
  },
});

This is the error I am getting

[Node] error:   Invalid login: 535 5.7.139 Authentication unsuccessful, the request did not meet the criteria to be authenticated successfully. Contact your administrator. [VI1PR0501CA0022.eurprd05.prod.outlook.com]

This is happening on localhost while developing locally, but later I am gonna deploy this to heroku.

What I tried:

  1. Tried this solution and enabled Authenticated SMPT
  2. Tried using OAUTH and registering an azure project, but there are no resources on how to do SERVER-TO-SERVER communication instead of client to server.

What I need to happen:

  1. I have email A in organization and we have a shared inbox B. Ideally I'd be able to send email from B to B ( when user sends us a message I want it to be received in the shared inbox)

  2. Be able to send from B (shared inbox ) to other users outside of our organization (our apps users)

After hours of searching and reading the docs, I am unable to find whether or not this is possible. All solutions mention Azure while I don't even use Azure in my app. I just need to send emails via our business email (shared inbox email) to ourself and to our users. I don't use any of the azure services, the docs are huge and are hard to navigate so I have no idea what is happening.

node.jsazureemailoutlooknodemailer


Solution 1:[1]

You need to disable the Azure Security Defaults by toggling the Enable Security Defaults to No.

  • Sign in to the Azure portal as a Security administrator. Conditional Access administrator, or Global administrator,
  • Browse to Azure Active Directory Properties
  • Select Manage security defaults.
  • Set the Enable security defaults toggle to No.
  • Select Save.

You need to wait for some time (couple of minutes), and the problem will be solved.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Ghyath Serhal

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