Today I would like to discuss an exiting area. That is sending automated emails. I know you all are excited now. Let's role out..!



There are two famous methods for sending mail. I’ll discuss both of them.

1. Sending mails using sendgrid (v3)

First, create the free account in app.sendgrid.com

get the API -> create new API

Register for send authentication user-> to providing a mail for -> 'from' field 

Settings -> Sender Authentication -> Single Sender Verification -> Verify an Address (or you will get an error of => error: The from address does not match a verified Sender Identity.)


install sendGrid npm package
npm install --save sendgrid-v3-node

[official ->https://www.npmjs.com/package/sendgrid-v3-node]

const sendgrid = require("sendgrid-v3-node");

const mailOptions = {
  sendgrid_key:
    "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",
  from_email: "kamalsilva007890@gmail.com  ", //Single Sender Verification Shoud be done
  from_name: "KamalSilva",
  to: "yasassandeepa007@gmail.com",
};


//inside the controller  we want to send mail ->
exports.sendmail = (req, res, next) => {

  mailOptions.subject = "SendGrid Mail";
  mailOptions.content =
    "<strong>Testing with sendgrid</strong><br></br><h1>Yasas Sandeepa</h1>";
  sendgrid
    .send_via_sendgrid(mailOptions)
    .then((response) => {
      console.log(response);
    })
    .catch((err) => {
      console.log("Errorr--------------");

      console.log(err);
    });

}


2. Sending a mail with fake SMTP server

We are using Mail trap here.

This is not actually delivered the mail but you can see it in mailtrap mailbox.

First, create an account and get the SMTP username and password settings in mailtrap.

Then install nodemailer.
npm install --save nodemailer

const nodemailer = require("nodemailer");

exports.sendMail = (req, res, next) => {

  let transport = nodemailer.createTransport({
    host: "smtp.mailtrap.io",//no need to change
    port: 2525,
    auth: {
      user: "e8bc95702fcb04", //get the username and password in the mail box
      pass: "9c416a31a224a8",
    },
  });

  const message = {
    from: "kamalSilva@gmail.com",
    to: "yasassandeepa007@gmail.com",
    subject: "Testing Mailtrap",
    html: "<h1>Yooo HOOO!!!!</h1><p>Get your <b>Tesla</b> today!</p>",
  };
  transport.sendMail(message, function (err, info) {
    if (err) {
      console.log(err);
    } else {
      console.log(info);
    }
  });

  res.render("auth/login", {
    pageTitle: "Login Page",
    active: "login",
    errorMessage: req.flash("info"),
  });
};