diff --git a/src/frontend/src/components/MailPanel.tsx b/src/frontend/src/components/MailPanel.tsx
index 9c645f6..97c03b5 100644
--- a/src/frontend/src/components/MailPanel.tsx
+++ b/src/frontend/src/components/MailPanel.tsx
@@ -59,15 +59,6 @@ export default function MailPanel() {
         if (res.ok) {
           const data = await res.json();
           setDetail(data);
-          // 标记已读
-          if (!data.is_read) {
-            await fetch(`/api/mail/${selectedId}`, {
-              method: 'PATCH',
-              headers: { 'Content-Type': 'application/json' },
-              body: JSON.stringify({ is_read: true }),
-            });
-            loadMails();
-          }
         }
       } catch { /* */ }
     })();