Secure mail box

A mail box having a depository vault overlying a secure compartment. A mail deposit platform and a flag door are independently rotatable with respect to each other to open and close a mail deposit opening in the depository vault. The mail deposit platform receives mail in the depository vault. If the mail placed on the mail platform is incoming mail, the platform is rotated to transfer the incoming mail to the underlying secure compartment, as well as to close the mail deposit opening. If the mail placed on the platform is outgoing mail, the flag door is rotated to close the mail deposit opening and to provide an indication to the postman that the mail is to be picked up and delivered to the destination.