Discussion on: How to implement email functionality with Node.js, React.js, Nodemailer, and OAuth2

[Jared Long]

Hey happy to try and help. What does your code look like?

[Md Nasir Uddin]

---

**import express from "express";
import expressAsyncHandler from "express-async-handler";
import { google } from "googleapis";
import nodemailer from "nodemailer";
import dotenv from "dotenv";

dotenv.config();
const testRouter = express.Router();
// eslint-disable-next-line no-undef
const client_id = process.env.GMAIL_CLIENT_ID;
// eslint-disable-next-line no-undef
const client_secret = process.env.GMAIL_CLIENT_SECRET;
// eslint-disable-next-line no-undef
const redirect_uri = process.env.GMAIL_REDIRECT_URI;
// eslint-disable-next-line no-undef
const refresh_Token = process.env.GMAIL_REFRESH_TOKEN;
// eslint-disable-next-line no-undef
const myEmail = process.env.EMAIL;
// eslint-disable-next-line no-undef
const outLookEmail = process.env.OUTLOOKEMAIL;
// eslint-disable-next-line no-undef
const outLookPass = process.env.OUTLOOKPASS;

console.log(client_secret);

const oAuth2Client = new google.auth.OAuth2(
client_id,
client_secret,
redirect_uri
);
oAuth2Client.setCredentials({
refresh_token: refresh_Token,
});

testRouter.post(
"/email",
expressAsyncHandler(async (req, res) => {
async function send_mail() {
const access_token = await oAuth2Client.getAccessToken();
const transport = nodemailer.createTransport({
service: "gmail",
auth: {
type: "OAuth2",
user: myEmail,
clientId: client_id,
clinet_secret: client_secret,
refreshToken: refresh_Token,
accessToken: access_token,
},
tls: {
rejectUnauthorized: false,
},
});
// there is problem with this approach when verifying the transport is says clinent secret is missing;
transport.verify((err, success) => {
err
? console.log(err)
: console.log(=== Server is ready to take messages: ${success} ===);
});
const mailOptions = {
from: RareCarry ${myEmail},
to: "[e-mail]",
subject: "Your Order has been placed! ",
// attachment: attch,
text: Hello ${name} your order ID: . Thank you for shopping with us!. we will send your purchase details & invoice soon.,
html: <h2>Hello, ${name}</h2>
<h3>Your order ID:</h3>
<p>Thank you for shopping with us!. we will send your purchase details & invoice soon</p>
<em>Please visit our blog and news to get a discount deal. <a href='https://rarecarry.com'>RareCarry</a></em>
,
};
transport.sendMail(mailOptions, (error, result) => {
if (error) {
console.log("Error:", error);
} else {
console.log("Success: ", result);
}
transport.close();
});
}
send_mail();
res.send({ message: "Hi!" });
})
);

testRouter.post(
"/outlook",
expressAsyncHandler(async (req, res) => {
const transport = nodemailer.createTransport({
service: "hotmail",
auth: {
user: outLookEmail,
pass: outLookPass,
},
tls: {
rejectUnauthorized: false,
},
});
const mailOptions = {
from: RareCarry ${outLookEmail},
to: "[e-mail]",
// cc:'[e-mail]',
subject: "Your Order has been placed! ",
// attachment: attch,
text: Hello Nasir your order ID: . Thank you for shopping with us!. we will send your purchase details & invoice soon.,
html: <h2>Hello, Nasir</h2>
<h3>Your order ID:</h3>
<p>Thank you for shopping with us!. we will send your purchase details & invoice soon</p>
<em>Please visit our blog and news to get a discount deal. <a href='https://rarecarry.com'>RareCarry</a></em>
,
};

transport.sendMail(mailOptions, (err, result) => {
  if (err) {
    console.log(err);
  } else {
    console.log("Message sent:", result);
  }
});
transport.close();
res.send({ message: "HI!!!" });

})
);

export default testRouter;**

[Jared Long]

Awesome thanks. One thing that I see is that your client secret key is misspelled within your createTransport object but I think it should be camelCase as well. Hopefully that does the trick :)

clinet_secret: client_secret -> clientSecret: client_secret

and/or if you wanted to get fancy with new es6 syntax (not necessary at all):

define your client secret camelCase as well
const clientSecret = process.env.GMAIL_CLIENT_SECRET;

and within you transporter object, you could just define like so (could do with most of your variables):

const transport = nodemailer.createTransport({
service: "gmail",
auth: {
      type: "OAuth2",
      user: myEmail,
      clientId: client_id,
      clientSecret,                              <-------------------
      refreshToken: refresh_Token,
      accessToken: access_token,
},

[Md Nasir Uddin]

Thank you so much Jared, it's work. Great tutorial.