CREATE TABLE `access_mail` (
  `sender_address` varchar(64) NOT NULL default '',
  `action` varchar(64) NOT NULL default '',
  `sender_host_address` varchar(64) NOT NULL default '',
  `asn` varchar(64) NOT NULL default '',
  `country` char(2) NOT NULL default '',
  `continent` char(2) NOT NULL default '',
  `received_ip_address` varchar(64) NOT NULL default '',
  `created_on` datetime NOT NULL default '0000-00-00 00:00:00',
  `expired_on` datetime NOT NULL default '0000-00-00 00:00:00',
  `smtp_message` varchar(256) NOT NULL default '',
  `log_message` varchar(256) NOT NULL default '',
  KEY `sender_address` (`sender_address`,`expired_on`)
);