A vehicle-mounted device includes: a phone book acquiring section for acquiring a phone book data of a portable device via a communication section; a manipulation section for rejecting an arrival of a call at a call section; a specification section for specifying a mail address of the opposite party from which the arrival of a call is rejected by the manipulation section with reference to the phone book data; and a call-rejected party mail-reception notification suppressing section for suppressing the notification of reception of an E-mail from the mail address specified by the specification section to the vehicle-mounted device.