Author: saqibkhan

For security, store sensitive information like email credentials in environment variables:

let transporter = nodemailer.createTransport({
service: 'gmail',
auth: {
    user: process.env.EMAIL_USER,
    pass: process.env.EMAIL_PASS
}
});

In your .env file:

[email protected]
EMAIL_PASS=your-email-password

For inline images, use the cid (Content-ID) in your HTML:

<img src="cid:[email protected]" />

To send attachments, modify the mailOptions like so:

let mailOptions = {
from: '"Your Name" <[email protected]>',
to: '[email protected]',
subject: 'Hello ✔',
text: 'Hello world?',
html: '<b>Hello world?</b>',
attachments: [
    {
        filename: 'file.txt',
        path: '/path/to/file.txt'
    },
    {
        filename: 'image.png',
        path: '/path/to/image.png',
        cid: '[email protected]' // for inline images
    }
]
};

If you need to use a custom SMTP server, configure it like this:

let transporter = nodemailer.createTransport({
host: 'smtp.example.com',
port: 587, // or 465 for SSL
secure: false, // true for 465, false for other ports
auth: {
    user: 'your-username',
    pass: 'your-password'
}
});

You can configure Nodemailer to use other email services by adjusting the transport configuration. For example, to use SendGrid:

let transporter = nodemailer.createTransport({
service: 'SendGrid',
auth: {
    user: 'apikey', // This is the default SendGrid username
    pass: 'your-sendgrid-api-key'
}
});

Here’s a simple example of sending an email:

const nodemailer = require('nodemailer');

// Create a transporter object using SMTP transport
let transporter = nodemailer.createTransport({
service: 'gmail', // You can use other services like 'hotmail', 'yahoo', etc.
auth: {
    user: '[email protected]',
    pass: 'your-email-password'
}
});

// Set up email data
let mailOptions = {
from: '"Your Name" <[email protected]>', // sender address
to: '[email protected]', // list of receivers
subject: 'Hello ✔', // Subject line
text: 'Hello world?', // plain text body
html: '<b>Hello world?</b>' // html body
};

// Send mail with defined transport object
transporter.sendMail(mailOptions, (error, info) => {
if (error) {
    return console.log(error);
}
console.log('Message sent: %s', info.messageId);
});

First, you need to install Nodemailer using npm:

npm install nodemailer