diff --git a/application/admin/controllers/DownController.php b/application/admin/controllers/DownController.php
index 9dde46d8..cb0b89de 100644
--- a/application/admin/controllers/DownController.php
+++ b/application/admin/controllers/DownController.php
@@ -143,7 +143,7 @@ class Admin_DownController extends Zend_Controller_Action
 			// 3. 未认证的数据，即无明确的数据管理者，从元数据提取对应管理者的email信息进行管理
 			//无数据作者的数据，根据元数据中的联系人信息发送相应的管理邮件，发送策略是多发还是少发？
 			//发送管理邮件同时建议用户认证为数据的作者，可以有更多的管理选择，同时邮件中应该有详细的说明为什么会收到此邮件
-			$sql="select res.email,d.uuid,m.title,role.role from dataorder d left join role on d.uuid=role.uuid left join responsible res on role.resid=res.id
+			$sql="select distinct res.email,d.uuid,m.title,role.role from dataorder d left join role on d.uuid=role.uuid left join responsible res on role.resid=res.id
 				 left join metadata m on d.uuid=m.uuid left join mdstatus s on d.uuid=s.uuid where length(res.email)>4 and d.offlineappid=?
 				 and (s.status=5 or s.status is null) and role.role in ('pointOfContact','custodian','resourceProvider','owner','distributor','publisher','author')
 				 order by m.title,res.email";