Abstract: A communication apparatus is connected to a terminal apparatus via a network. The communication apparatus includes a storage that stores a document file and an HTML file of a user setting page. A file manager stores a storage period for the document file, determines whether or not the document file has been stored in the storage for the storage period, and deletes the document file when the document file has been stored in the storage for the storage period. A web server transmits, to the terminal apparatus, the HTML file of the user setting page, the user setting page configured so that a user at the terminal apparatus can request a change of the storage period. The web server further instructs the file manager to change the storage period, when the user requests the change of the storage period.

Abstract: An image communication apparatus includes a transmitter that transmits an e-mail with data attached, via a computer network, a receiver that receives an e-mail with data attached, via the computer network, and a controller that converts the attached data into image data. The controller judges whether or not the received e-mail is an error mail, the error mail being related to the e-mail transmitted by the image communication apparatus, based on a search of a header of the received e-mail for a predetermined character string. The predetermined character string is related to a sender of the error mail. The controller determines that the received e-mail in the error mail, when the result of the search indicates that the header of the received e-mail includes the predetermined character string.