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@@ -93,6 +93,18 @@ class Folder extends Base {
         if(empty($formData['folder'])){
             app()->e('folder_create_name_error');
         }
+
+        $formData['folder'] = str_replace(
+            ["'",'"','/','\\','&','*','(',')','{','}','|','$','@','!','#','%','^','<','>','?','`','~','[',']'],
+            '',
+            $formData['folder']
+        );
+
+        // 是否是系统的
+        if(folderAlias($formData['folder']) !== $formData['folder']){
+            app()->e('folder_is_exist');
+        }
+
         // 加密后的文件夹
         $origin_folder = MailFun::folderEncoding($formData['folder']);
         // 不为空上级
@@ -109,12 +121,6 @@ class Folder extends Base {
             $origin_folder = $parent['origin_folder'].'/'.$origin_folder;
         }
 
-        $formData['folder'] = str_replace(
-            ["'",'"','/','\\','&','*','(',')','{','}','|','$','@','!','#','%','^','<','>','?','`','~','[',']'],
-            '',
-            $formData['folder']
-        );
-
         // 判断文件夹是否存在
         $has = db()->count(folderSql::has(
             [