text: CREATE TABLE `mail_headers` (
  	`id` INT UNSIGNED NOT NULL,
  	`sender_id` INT UNSIGNED NOT NULL,
  	`sender_type` VARCHAR(32) NULL DEFAULT NULL,
  	`subject` VARCHAR(255) NULL DEFAULT NULL,
  	`body` TEXT NULL DEFAULT NULL,
  	`sent` TIMESTAMP NOT NULL,
  	`created_at` TIMESTAMP NOT NULL,
  	PRIMARY KEY (`id`) USING BTREE,
  	INDEX `mail_headers_sender_id_idx` (`sender_id`) USING BTREE,
  	INDEX `mail_headers_sender_type_idx` (`sender_type`) USING BTREE
  ) COLLATE = 'utf8mb4_unicode_ci' ENGINE = InnoDB;