<p>Among unique addresses as data transmission destinations such as electronic mail addresses, a partial address common to a plurality of addresses is stored in a storage section. For example, in the electronic mail address having a user name and a domain, the domain is made a partial address. A data transmission device such as the Internet facsimile device limits data transmission of image data only to the address including the partial address registered in the storage section. That is, data is transmitted only to the addresses having the same domain.</p>
