diff --git a/database/maildb.sql b/database/maildb.sql
index d2a3e973..70b6231f 100644
--- a/database/maildb.sql
+++ b/database/maildb.sql
@@ -40,15 +40,14 @@ DROP TABLE IF EXISTS `t_mailbox`;
 CREATE TABLE `t_mailbox` (
   `idx` int(11) NOT NULL AUTO_INCREMENT COMMENT '自增id',
   `mailid` bigint NOT NULL COMMENT 'mail id',
-  `_from` varchar(60) CHARACTER SET utf8 NOT NULL COMMENT 'from',
-  `_to` varchar(60) CHARACTER SET utf8 NOT NULL COMMENT 'to',
+  `from` varchar(60) CHARACTER SET utf8 NOT NULL COMMENT 'from',
+  `to` varchar(60) CHARACTER SET utf8 NOT NULL COMMENT 'to',
   `subject` mediumblob COMMENT 'subject',
   `content` mediumblob COMMENT '消息内容',
-  `ext` mediumblob COMMENT 'ext',
   `attachments` varchar(255) CHARACTER SET utf8 NOT NULL DEFAULT '' COMMENT '附件',
-  `mailtype` int(11) NOT NULL DEFAULT '0' COMMENT 'mailtype',
-  `mailsubtype` int(11) NOT NULL DEFAULT '0' COMMENT 'mailsubtype',
-  `usertype` int(11) NOT NULL DEFAULT '0' COMMENT 'usertype',
+  `type` int(11) NOT NULL DEFAULT '0' COMMENT 'mailtype',
+  `sub_type` int(11) NOT NULL DEFAULT '0' COMMENT 'mailsubtype',
+  `user_type` int(11) NOT NULL DEFAULT '0' COMMENT 'usertype',
   `deleted` int(11) NOT NULL DEFAULT '0' COMMENT '是否已删除',
   `sendtime` int(11) NOT NULL DEFAULT '0' COMMENT '发送时间',
   `expiretime` int(11) NOT NULL DEFAULT '0' COMMENT '过期时间',
@@ -56,20 +55,20 @@ CREATE TABLE `t_mailbox` (
   `modifytime` int(11) NOT NULL DEFAULT '0' COMMENT '修改时间',
   PRIMARY KEY (`idx`),
   UNIQUE KEY `mailid` (`mailid`),
-  KEY `_to` (`_to`),
-  KEY `_from` (`_from`),
+  KEY `to` (`to`),
+  KEY `from` (`from`),
 ) ENGINE=InnoDB AUTO_INCREMENT=10000 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 /*!40101 SET character_set_client = @saved_cs_client */;
 /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
 
 --
--- Table structure for table `account_data`
+-- Table structure for table `t_account_data`
 --
 
-DROP TABLE IF EXISTS `account_data`;
+DROP TABLE IF EXISTS `t_account_data`;
 /*!40101 SET @saved_cs_client     = @@character_set_client */;
 /*!40101 SET character_set_client = utf8 */;
-CREATE TABLE `account_data` (
+CREATE TABLE `t_account_data` (
   `idx` int(11) NOT NULL AUTO_INCREMENT COMMENT '自增id',
   `accountid` varchar(60) CHARACTER SET utf8 NOT NULL COMMENT '账号id',
   `blobdata` mediumblob COMMENT '账号',