1.1.0
  CREATE TABLE IF NOT EXISTS `gw_webmail_docs` (
    `id` int(11) NOT NULL AUTO_INCREMENT,
    `state` varchar(15) DEFAULT NULL,
    `sort_no` int(11) DEFAULT NULL,
    `created_at` datetime DEFAULT NULL,
    `updated_at` datetime DEFAULT NULL,
    `published_at` datetime DEFAULT NULL,
    `title` text,
    `body` text,
    PRIMARY KEY (`id`)
  );
  CREATE TABLE IF NOT EXISTS `gw_webmail_mail_address_histories` (
    `id` int(11) NOT NULL AUTO_INCREMENT,
    `user_id` int(11) DEFAULT NULL,
    `created_at` datetime DEFAULT NULL,
    `updated_at` datetime DEFAULT NULL,
    `address` varchar(255) DEFAULT NULL,
    `friendly_address` varchar(255) DEFAULT NULL,
    PRIMARY KEY (`id`),
    KEY `user_id` (`user_id`)
  );
  ALTER TABLE `gw_webmail_mail_nodes` ADD `ref_uid` INT NULL;
  ALTER TABLE `gw_webmail_mail_nodes` ADD `ref_mailbox` TEXT NULL;
  ALTER TABLE `sys_users` CHANGE `air_login_id` `air_login_id` TEXT;