I am trying to send an email through my node JS application, and I have this script in one of my pages.

<script src="https://smtpjs.com/v3/smtp.js"></script>
<script>
    function sendEmail(){console.log(Email)
        Email.send({
            SecureToken:'#########',
            To: `mymail@gmail.com`,
            From: "info@example.com",
            Subject: "Hello world",
            Body: `Lorem ipsum dolor sit amet`
        }).then(response => {
            alert(response)
        });
    }
</script>
<button onclick="sendEmail()">Send email</button>

I get as response OK, but no email is being sent. Any idea what am I missing?