<!---

preview: amp4email
skipValidation: 'true'
draft: 'true'

--->

<!--
## Introduction

This sample demonstrates how to let users perform an asynchronous action (bookmarking an article)
in an AMPHTML email.

It leverages the [`amp-form`](https://www.ampproject.org/docs/reference/components/amp-form) extension to
send a request to the server without the user leaving their e-mail client.
-->

<!-- -->
<!doctype html>
<html âš¡4email>
<head>
  <meta charset="utf-8">
  <script async src="https://cdn.ampp