Customizing Email Headers

For specific use cases, you might need to add custom headers to your emails. This can be useful for tracking or integrating with other systems.

Adding Custom Headers:

let mailOptions = {
    from: '"Your Name" <[email protected]>',
    to: '[email protected]',
    subject: 'Custom Header Example',
    text: 'This email has custom headers.',
    headers: {
        'X-Custom-Header': 'CustomHeaderValue',
        'X-Another-Header': 'AnotherHeaderValue'
    }
};

transporter.sendMail(mailOptions, (error, info) => {
    if (error) {
        return console.error('Error sending email:', error);
    }
    console.log('Email sent:', info.response);
});