diff --git a/app/services/mail_store.py b/app/services/mail_store.py
index 5eab42b..a5fd6a0 100644
--- a/app/services/mail_store.py
+++ b/app/services/mail_store.py
@@ -48,7 +48,15 @@ class MailStore:
             recipients_list = recipients  # 如果是列表，直接使用
         else:
             recipients_list = recipients.split(",")  # 假设是以逗号分隔的字符串
-        logging.debug(f"解析后的收件人列表: {recipients_list}")
+        
+        # 确保收件人列表不为空
+        if recipients_list is None or not recipients_list:
+            logging.error("收件人列表为空，无法保存邮件")
+            return False, "收件人列表为空"
+        
+        # 打印收件人列表以进行调试
+        logging.debug(f"收件人列表: {recipients_list}")
+        
         if message is None:
             logging.error("邮件内容无效，无法保存邮件")
             return False, "邮件内容无效"
@@ -223,14 +231,14 @@ class MailStore:
             
             except Exception as e:
                 session.rollback()
-                logging.error(f"数据库操作失败: {str(e)}")
+                logging.error(f"数据库操作失败#1: {str(e)}")
                 raise
             finally:
                 session.close()
         
         except Exception as e:
-            logging.error(f"邮件保存失败: {str(e)}")
-            return False, f"保存邮件失败: {str(e)}"
+            logging.error(f"邮件保存失败#2: {str(e)}")
+            return False, f"保存邮件失败#3: {str(e)}"
             
     def get_emails_for_mailbox(self, mailbox_id, limit=50, offset=0, unread_only=False):
         """获取指定邮箱的邮件列表"""