diff --git a/lib/features/thread/presentation/thread_controller.dart b/lib/features/thread/presentation/thread_controller.dart
index 29570a001..5b8604b77 100644
--- a/lib/features/thread/presentation/thread_controller.dart
+++ b/lib/features/thread/presentation/thread_controller.dart
@@ -172,7 +172,7 @@ class ThreadController extends BaseController {
 
   bool canComposeEmail() => mailboxDashBoardController.sessionCurrent != null
       && mailboxDashBoardController.userProfile.value != null
-      && mailboxDashBoardController.mapMailboxId.containsKey([PresentationMailbox.roleOutbox]);
+      && mailboxDashBoardController.mapMailboxId.containsKey(PresentationMailbox.roleOutbox);
 
   void openMailboxLeftMenu() {
     mailboxDashBoardController.openDrawer();