A terminal and operating method thereof includes receiving a plurality of contents, classifying the plurality of received contents into a plurality of groups based on recipient information of a recipient corresponding to a user of the terminal, and outputting the plurality of contents classified into the plurality of groups in order corresponding to the recipient information. A thumbnail image represents each of the plurality of groups. The thumbnail image is displayed in accordance with the recipient information, such as a thumbnail image of a group considered to be more of interest to a user displayed in a larger size.