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 f66a94fddf1..c405ac873be 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
@@ -250,6 +250,8 @@ export class MassMailingHtmlField extends HtmlField {
 
             if ($codeview.hasClass('d-none')) {
                 this.wysiwyg.setValue($codeview.val());
+                this.wysiwyg.odooEditor.sanitize();
+                this.wysiwyg.odooEditor.historyStep(true);
             } else {
                 $codeview.val(this.wysiwyg.getValue());
             }