Abstract: The Electronic Mail Alert System uses infrared emitting diodes and matching detectors to determining the presence or absence of mail. This information is applied to a microcontroller, which provide a coded signal to the transmitter. Each mailbox has its own code and its matching receiver will only accept that unique code. The electronic circuitry will not be seen in the mailbox and everything is automatically done. All the mailperson need to do is deliver the mail as usual.