Error: connect ECONNREFUSED 127.0.0.1:587 – nodemailer & gmail - node.js

Question

Dear stack overflow community,
I am dealing with a project and I tried many things, but I can't handle it.
I created a website with NextJS. This Website has a contact form. To send the data from the contact form to the addressee, there is an API which takes the request and with nodemailer I am trying to create a transporter to send the email with Gmail.
const nodemailer = require("nodemailer");
const { google } = require("googleapis");
export default async function (req, res) {
const body = JSON.parse(req.body);
const CLIENT_EMAIL = process.env.CLIENT_EMAIL;
const CLIENT_ID = process.env.CLIENT_ID;
const CLIENT_SECRET = process.env.CLIENT_SECRET;
const REDIRECT_URI = process.env.REDIRECT_URI;
const REFRESH_TOKEN = process.env.REFRESH_TOKEN;
const OAuth2Client = new google.auth.OAuth2(
CLIENT_ID,
CLIENT_SECRET,
REDIRECT_URI
);
OAuth2Client.setCredentials({ refresh_token: REFRESH_TOKEN });
try {
// Generate the accessToken on the fly
const accessToken = await OAuth2Client.getAccessToken();
// Account authentication config
const authConfig = {
type: "OAuth2",
user: CLIENT_EMAIL,
clientId: CLIENT_ID,
clientSecret: CLIENT_SECRET,
refreshToken: REFRESH_TOKEN,
accessToken: accessToken,
};
// Create the email envelope (transport)
const transport = nodemailer.createTransport(authConfig);
// Create the email options and body
// ('email': user's email and 'name': is the e-book the user wants to receive)
const mailOptions = {
from: `${CLIENT_EMAIL}`,
to: body.email,
subject: `${body.name} – ${body.reason}`,
text: `${body.message}`,
};
const result = await transport.sendMail(mailOptions);
return result;
} catch (error) {
console.log(error);
}
res.status(200).json({
message: "Email has been sent",
});
}
The problem is, when the User sends the email, I get the following error message:
Error: connect ECONNREFUSED 127.0.0.1:587
at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1161:16) {
errno: -61,
code: 'ESOCKET',
syscall: 'connect',
address: '127.0.0.1',
port: 587,
command: 'CONN'
}
I tried a couple of things now, but I really do not make any progress at this point. I would be super happy if somebody could help me.
Thanks a lot in advance.

Answer 1

Just make http://localhost:8000 to http://127.0.0.1:8000. It works. Windows are not configured to figure this out. An IP address should be in the conventions of numbers.
http://127.0.0.1:8000
The above address is the default one for any computer