<iframe class="mj-w-res-iframe" src="https://app.mailjet.com/widget/iframe/2AmK/qrV" width="100%" frameborder="0" marginwidth="0" marginheight="0" scrolling="no"></iframe>

<script type="text/javascript" src="https://app.mailjet.com/statics/js/iframeResizer.min.js"></script>