Kalle Kuhlmann•2mo ago

Nodemailer fails with Client network socket disconnected before... even locally

Hey, I am trying to use nodemailer within deno (2.0.4), and I am unable to figure out why it doesn't work. I made a minimal example (ethereal credentials specifically for this example):

import nodemailer from 'npm:nodemailer';

const testMail = async () => {
  const transporter = nodemailer.createTransport({
    host: "smtp.ethereal.email",
    port: 587,
    secure: false, // Use `true` for port 465, `false` for all other ports
    auth: {
      user: "tess3@ethereal.email",
      pass: "K9S6HKVEg8bDtVNnnr",
    },
    logger: true,
  });

  return transporter.verify();
}

testMail();

import nodemailer from 'npm:nodemailer';

const testMail = async () => {
  const transporter = nodemailer.createTransport({
    host: "smtp.ethereal.email",
    port: 587,
    secure: false, // Use `true` for port 465, `false` for all other ports
    auth: {
      user: "tess3@ethereal.email",
      pass: "K9S6HKVEg8bDtVNnnr",
    },
    logger: true,
  });

  return transporter.verify();
}

testMail();

This fails with

Client network socket disconnected before secure TLS connection 
was established

independent of the "secure" setting. If I run this same snipped with node, there is no problem. Does somebody have an idea? Best, Kalle

3 Replies

bartlomieju•2mo ago

Could you please open an issue on Deno's GitHub? This seems like a bug in Deno

Kalle KuhlmannOP•2mo ago

Sure. I'll do tomorrow as soon as I am on the pc

bartlomieju•2mo ago

Thanks!