diff --git a/app/__init__.py b/app/__init__.py
index 5543ded..2b1c0e6 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -87,8 +87,10 @@ def create_app():
             # 使用新函数获取邮件数据
             email = get_email_by_id(message_id)
             if not email:
+                logger.warning(f"No email found for message_id: {message_id}")
                 return "邮件不存在", 404
             
+            logger.debug(f"Retrieved email: {email}")
             return render_template('email_detail.html', email=email)
             
         except Exception as e: