diff --git a/addons/mass_mailing/static/src/js/mass_mailing_html_field.js b/addons/mass_mailing/static/src/js/mass_mailing_html_field.js
index c8ec19ccc6e..41edd25f0cf 100644
--- a/addons/mass_mailing/static/src/js/mass_mailing_html_field.js
+++ b/addons/mass_mailing/static/src/js/mass_mailing_html_field.js
@@ -141,6 +141,7 @@ export class MassMailingHtmlField extends HtmlField {
             const clonedBody = clonedHtmlNode.querySelector('body');
             const clonedIframeTarget = clonedHtmlNode.querySelector('#iframe_target');
             clonedBody.replaceChildren(clonedIframeTarget);
+            clonedBody.querySelector('.iframe-utils-zone').remove();
             clonedHtmlNode.querySelectorAll('script').forEach(script => script.remove()); // Remove scripts.
             iframe.srcdoc = clonedHtmlNode.outerHTML;
             const iframePromise = new Promise((resolve) => {