SMTP is not working for google cloud run.

Question

The mail server is successfully sending the email, but the receiver is not receiving it. This happens when the code is deployed on Google Cloud Run.

I am using Node.js to send the mail. These are my SMTP settings.

let config = {

host: "smtp-mail.outlook.com",

debug: true,

logger: true,

port: 587,

auth: {

  user: 'xxx',

  pass: 'xxx'

},

tls: {

  ciphers: "SSLv3",

  rejectUnauthorized: false,

},

};