Embodiments of the invention relate to a mail sending and receiving devices and methods. In one embodiment, a communication device comprises a display unit, and a receiving unit configured to receive a mail which includes a plurality of mail contents and condition information governing which of the plurality of mail contents can be displayed. A storage unit is configured to store the mail which is received by the receiving unit. A control unit is configured to control display of the plurality of mail contents by the display unit in response to the condition information, when a display instruction of the mail which is stored in the storage unit is inputted.