diff --git a/webapp/services/MailApiService.php b/webapp/services/MailApiService.php
index ca557116..b7c2e2b9 100644
--- a/webapp/services/MailApiService.php
+++ b/webapp/services/MailApiService.php
@@ -4,12 +4,34 @@ namespace services;
 
 class MailApiService extends BaseService {
 
-    public function sendSellMail($to)
+    /*
+      to：邮件接受方account_id
+      content: 邮件正文
+      attachments: 邮件附件
+      [
+      {
+        "item_id": 0, //道具id
+        "item_num": 0, //道具数量
+      }
+      ]
+     */
+    public function sendSellMail($to, $content, $attachments)
     {
 
     }
 
-    public function sendBuyMail($to)
+    /*
+      to：邮件接受方account_id
+      content: 邮件正文
+      attachments: 邮件附件
+      [
+      {
+        "item_id": 0, //道具id
+        "item_num": 0, //道具数量
+      }
+      ]
+     */
+    public function sendBuyMail($to, $content, $attachments)
     {
 
     }