`created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'Creation date of this entry',
`success` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'Date of the last successful delivery',
`failure` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'Date of the last failed delivery',
`created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'Creation date of this entry',
`success` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'Date of the last successful delivery',
`failure` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'Date of the last failed delivery',