diff --git a/frontend/client/src/views/email/modals/detail.js b/frontend/client/src/views/email/modals/detail.js
index 48a25e6f1d..9b22bbbaad 100644
--- a/frontend/client/src/views/email/modals/detail.js
+++ b/frontend/client/src/views/email/modals/detail.js
@@ -31,11 +31,13 @@ Espo.define('Views.Email.Modals.Detail', ['Views.Modals.Detail', 'Views.Email.De
                 'label': 'Reply',
                 'style': 'danger'
             });
-            this.listenToOnce(this.model, 'sync', function () {
-                setTimeout(function () {
-                    this.model.set('isRead', true);
-                }.bind(this), 50);
-            }, this);
+            if (this.model) {
+                this.listenToOnce(this.model, 'sync', function () {
+                    setTimeout(function () {
+                        this.model.set('isRead', true);
+                    }.bind(this), 50);
+                }, this);
+            }
 
         },