A mailbox includes a hollow housing having a rear wall, an outer wall and an open front in communication with an interior mail receptacle. Within the mail receptacle is an actuator that deploys a delivery indicator when the access door is opened. Accordingly, when a mail carrier opens the door, the indicator automatically pivots downwardly to a vertical position, extending below the bottom surface of the housing, to conspicuously notify a user that mail has been delivered. The released indicator also exposes a textual alert message inscribed on the housing rear wall.

The mailbox delivery indicator is a signaling device. The mailbox delivery indicator incorporates a mailbox structure, a mechanical linkage structure, and a reflector structure. The mechanical linkage structure and the reflector structure attach to the mailbox structure. The mailbox structure forms a protected space that receives and stores one or more traditional messaging facilities. The mechanical linkage structure: a) mechanically detects when the protected space formed by the mailbox structure is accessed; and, b) mechanically changes the orientation of the reflector structure from a closed position into an open position. In the open position, the reflector structure presents a visible indication that the protected space of the mailbox structure has been accessed.