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@@ -31,7 +31,11 @@ class syncMail {
         }
 
         // 是否在指定文件夹内
-        $f = folderAlias($this->db->value(folderSql::first($data['folder_id'],'folder')));
+        $f = $this->db->value(folderSql::first($data['folder_id'],'folder'));
+        if(!$f){
+            return true;
+        }
+        $f = folderAlias($f);
         if($f=='发件箱'){
             if(empty($data['to_name'])){
                 $data['to_name'] = [];