diff --git a/addons/mail/static/src/components/message_list/message_list.js b/addons/mail/static/src/components/message_list/message_list.js
index 63b8e23c56b..82bfeb4a982 100644
--- a/addons/mail/static/src/components/message_list/message_list.js
+++ b/addons/mail/static/src/components/message_list/message_list.js
@@ -337,6 +337,9 @@ export class MessageList extends Component {
      * @param {ScrollEvent} ev
      */
     _onScrollThrottled(ev) {
+        if (!this.messageListView) {
+            return;
+        }
         const {
             orderedMessages,
             thread,
diff --git a/addons/mail/static/src/models/message_view/message_view.js b/addons/mail/static/src/models/message_view/message_view.js
index 4d1ab22dc0c..76c669559bd 100644
--- a/addons/mail/static/src/models/message_view/message_view.js
+++ b/addons/mail/static/src/models/message_view/message_view.js
@@ -17,6 +17,9 @@ registerModel({
             this.update({
                 isHighlighted: true,
                 highlightTimeout: this.env.browser.setTimeout(() => {
+                    if (!this.exists()) {
+                        return;
+                    }
                     this.update({ isHighlighted: false });
                 }, 2000),
             });