remove invalid ...

app/lib/sync.ts

@@ -129,7 +129,23 @@ async function syncEmailsForDomainOptimized(domainId: number, bucket: string, s3
       { retries: 3 }
     );
     
-    allS3Keys.push(...(response.Contents?.map(obj => obj.Key!).filter(Boolean) || []));
+    // Filtere Amazon SES System-Nachrichten und andere nicht-E-Mail-Objekte
+    const validKeys = response.Contents?.map(obj => obj.Key!)
+      .filter(key => {
+        // Filtere bekannte System-Nachrichten von Amazon SES
+        if (key === 'AMAZON_SES_SETUP_NOTIFICATION') {
+          console.log(`Skipping AWS system notification: ${key}`);
+          return false;
+        }
+        // Filtere andere potenzielle System-Dateien
+        if (key.startsWith('AMAZON_') || key.startsWith('.')) {
+          console.log(`Skipping system file: ${key}`);
+          return false;
+        }
+        return true;
+      }) || [];
+    
+    allS3Keys.push(...validKeys);
     continuationToken = response.NextContinuationToken;
   } while (continuationToken);