diff --git a/src/frontend/src/App.tsx b/src/frontend/src/App.tsx
index b4b55f2..c860483 100644
--- a/src/frontend/src/App.tsx
+++ b/src/frontend/src/App.tsx
@@ -79,7 +79,7 @@ export default function App() {
       return executing + '活跃';
     }
     if (key === 'mail') {
-      const unread = ((useStore.getState().sseEvents || []) as any[]).filter((n: any) => !n.read).length;
+      const unread = useStore.getState().mailUnread || 0;
       return unread > 0 ? String(unread) : '';
     }
     return '';