Abstract: This invention is a universal mail arrival indicator designed for rural, suburban, or urban curbside mailboxes of either the traditional plastic or metal design, or the modern plastic extruded mailbox housing and post. The system consists of a base unit that mounts on the top of the mailbox. The base unit holds a flag alert piece that has attached to it a retainer cord and retainer ring. When the mailbox alert is indicating mail has arrived, the flag alert is in a raised position with the retainer cord and wheel hanging at its side. When the mail has been removed, the consumer pushes down the flag horizontal with the box causing the torsion spring at the base to flex and the retainer cord and wheel to swing into the box. The door is closed and the mail arrival indicator is stored inside out of sight until the door is opened by the mail carrier.