diff --git a/database/maildb.sql b/database/maildb.sql
index d06e5e77..8a62234b 100644
--- a/database/maildb.sql
+++ b/database/maildb.sql
@@ -132,6 +132,8 @@ DROP TABLE IF EXISTS `t_event`;
 /*!40101 SET character_set_client = utf8 */;
 CREATE TABLE `t_event` (
   `idx` int(11) NOT NULL AUTO_INCREMENT COMMENT '自增id',
+  `event_name` varchar(60) CHARACTER SET utf8 NOT NULL DEFAULT '' COMMENT '事件名',
+  `param1` varchar(255) CHARACTER SET utf8 NOT NULL DEFAULT '' COMMENT '事件参数1',
   `createtime` int(11) NOT NULL DEFAULT '0' COMMENT '创建时间',
   `modifytime` int(11) NOT NULL DEFAULT '0' COMMENT '修改时间',
   PRIMARY KEY (`idx`)
diff --git a/server/mailserver/constant/constant.go b/server/mailserver/constant/constant.go
index c05fe292..99fc9cee 100644
--- a/server/mailserver/constant/constant.go
+++ b/server/mailserver/constant/constant.go
@@ -22,3 +22,8 @@ const (
 	INBOX_STATE_READ = 1
 	INBOX_STATE_DELETED = 2
 )
+
+const (
+	EVENT_MAIL_UPDATE = "mail.update"
+	EVENT_UPSER_GROUP_UPDATE = "user_group.update"
+)