Abstract: A mail detector is provided and consists of a mail box having a hinged door to provide access to the mail box for inserting mail, means for detecting mail within the mail box, a remote power source, a remote switch for connecting the power source through the means for detecting mail within the mail box when the switch is closed, a remote indicator lamp connected between the power source and the switch, the remote indicator lamp energized when the switch is closed and by the means for detecting mail within the mail box so that a person can look at the energized remote indicator lamp and know that mail is in the mail box and a mail box indicator lamp connected between the means for detecting mail within the mail box and the switch, the mail box indicator lamp energized when the switch is closed and by the means for detecting mail within the mail box so that a person can look at the energized mail box indicator lamp and know that mail is in the mail box.