Patent ID: 8560620

Claim:
An information processing apparatus comprising: an e-mail reception unit configured to receive an e-mail message to which a document is attached; a signature determination unit configured to determine whether or not a digital signature is appended to the e-mail message; a saving unit configured to save the document attached to the e-mail message as an approved document, which is approved for printing, when the signature determination unit determines that the digital signature is appended to the e-mail message, and save the document attached to the e-mail message as a non-approved document, which is not approved for printing, in association with an e-mail address of the e-mail message when the signature determination unit determines that the digital signature is not appended to the e-mail message; an acquisition unit configured to acquire user information; a retrieval unit configured to retrieve the non-approved document saved in association with an e-mail address that is associated in advance with the user information; a re-saving unit configured to change the non-approved document retrieved by the retrieval unit to an approved document, and saves the approved document; a setting screen display unit configured to display a screen required to set the user information and the e-mail address in association with each other; and an e-mail address determination unit configured to determine whether or not an e-mail address of the e-mail message received by the e-mail reception unit is the e-mail address which is associated in advance with the user information by the setting screen display unit, wherein when the e-mail address determination unit determines that the e-mail address of the received e-mail message is the e-mail address which is associated in advance with the user information, the signature determination unit determines whether or not a digital signature is appended to the e-mail message.