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 6d5031cb8d3..c8ec19ccc6e 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
@@ -535,6 +535,7 @@ export class MassMailingHtmlField extends HtmlField {
         for (const img of $container.find("img")) {
             const $img = $(img);
             const src = $img.attr("src");
+            $img.removeAttr('loading');
 
             let m = src.match(/^\/web\/image\/\w+\.s_default_image_(?:theme_[a-z]+_)?(.+)$/);
             if (!m) {
diff --git a/addons/mass_mailing/static/src/js/snippets.editor.js b/addons/mass_mailing/static/src/js/snippets.editor.js
index a4253847762..19073eae850 100644
--- a/addons/mass_mailing/static/src/js/snippets.editor.js
+++ b/addons/mass_mailing/static/src/js/snippets.editor.js
@@ -32,11 +32,26 @@ export const MassMailingSnippetsMenu = snippetsEditor.SnippetsMenu.extend({
             this.$editable = this.options.wysiwyg.getEditable();
         });
     },
+    /**
+     * @override
+     */
+    callPostSnippetDrop: async function ($target) {
+        $target.find('img[loading=lazy]').removeAttr('loading');
+        return this._super(...arguments);
+    },
 
     //--------------------------------------------------------------------------
     // Private
     //--------------------------------------------------------------------------
 
+    /**
+     * @override
+     */
+    _computeSnippetTemplates: function (html) {
+        const $html = $(`<div>${html}</div>`);
+        $html.find('img').attr('loading', 'lazy');
+        return this._super($html.html().trim());
+    },
     /**
      * @override
      */