To improve convenience by identifying the cognitive level of an electronic mail.

A mobile object communication terminal 100 detects the output status of a disclosed mail among stored received mails. For example, a mobile object communication terminal 100 detects a time when the text of the received mail has been displayed, the overall information amounts of the text of the received mail and the information amounts of a section outputted so as to be cognizable by a user in the text of the disclosed received mail as necessary, or detects whether or not return or transfer has been performed based on the mail. The mobile object communication terminal 100 searches the degree of provision showing to which extent the contents of the received mail has been provided to the user based on the detected output status, and classifies the received mails according to the searched provision level, and displays it so that a cognitive level preliminarily associated with a provider can be discriminated on a display part 142. Thus, it is possible to understandably present to which extent the disclosed mail has been read to the user.