Simple contact form on your web site:

<form action="https://pay2.email/" method="post">

    <label for="reply_to">From:</label>
    <input type="email" id="reply_to" name="reply_to" placeholder="Email address (optional)"><br><br>

    <label for="message">Message:</label>
    <textarea id="message" name="message" placeholder="Message"></textarea><br><br>

    <!-- The recipient is encrypted with the server key to prevent scraping, use below form to update it with your email -->
    <!-- Multiple recipients are supported -->
    <input type="hidden" name="to_enc" value="e1v9nk2tt9de3hy7ts...">

    <!-- Also the subject is encrypted with the server key -->
    <input type="hidden" name="subject_enc" value="e1de3hy7v9de3hy7...">

    <button type="submit">Pay 20 satoshi ⚡ to send</button>

</form>

<!-- By default an html page is returned, use header "Accept: application/json" for a json instead -->