-- mailing list subscription/unsubscription confirms.
CREATE TABLE IF NOT EXISTS `newsletter_subunsub_confirms` (
    `id` BIGINT(20) UNSIGNED AUTO_INCREMENT,
    -- email of mailing list
    `mail` VARCHAR(255) NOT NULL DEFAULT '',
    -- unique server wide id
    `mlid` VARCHAR(255) NOT NULL DEFAULT '',
    -- email of subscriber
    `subscriber` VARCHAR(255) NOT NULL DEFAULT '',
    -- kinds of 'subscribe', 'unsubscribe'
    `kind` VARCHAR(20) NOT NULL DEFAULT '',
    -- unique server-wide id as confirm token
    `token` VARCHAR(255) NOT NULL DEFAULT '',
    `expired` INT UNSIGNED DEFAULT 0,
    PRIMARY KEY (id),
    INDEX (mail),
    UNIQUE INDEX (mlid, subscriber, kind),
    INDEX (token),
    INDEX (expired)
) ENGINE=InnoDB;