address varchar(255) not null comment 'address (email, Jabber, SMS, etc.)',
address_extra varchar(255) not null comment 'carrier ID, for SMS',
address_type varchar(8) not null comment 'address type ("email", "jabber", "sms")',
+ claimed datetime comment 'date this was claimed for queueing',
+ sent datetime comment 'date this was sent for queueing',
modified timestamp comment 'date this record was modified'
) ENGINE=InnoDB;