A mobile communication terminal has an e-mail automatic reply function. The mobile communication terminal is set as to an allowable time difference, ringing and an e-mail automatic reply by an e-mail automatic reply function, and performs a domain analysis, etc. on the header information of the received e-mail message if the setting is made valid. Then, in the domain analysis, it is determined whether or not the time difference between an area (region) set by the roaming function and a region from which an e-mail message is sent is equal to or less than an allowable time difference, and if it is equal to or less than the allowable time difference, the mobile communication terminal notifies the receipt of the e-mail message by ringing. On the other hand, if the time difference is larger than the allowable time difference, the mobile communication terminal automatically sends a reply mail without notifying the receipt of the e-mail message.