Social and economic activities create demand for postal services. Each day, post office staff must sort large amounts of mail.

The Mail Exchange Centre at Colina de D. Maria manages the sorting, delivery, and transportation of mail.

Post office staff divide the mail into delivery segments. The sorted mail items are then passed on to the postal delivery workers covering the corresponding delivery segment.

With the help of the vertical mail sorting system, post office staff can sort letters accurately and quickly.

Post office staff frank postage duties paid on items of mail.

It is a postal delivery worker's mission to get letters directed correctly to every household, day-by-day, whether in sunshine or in rain.

It is a postal delivery worker's mission to get letters directed correctly to every household, day-by-day, whether in sunshine or in rain.

It is a postal delivery worker's mission to get letters directed correctly to every household, day-by-day, whether in sunshine or in rain.

It is a postal delivery worker's mission to get letters directed correctly to every household, day-by-day, whether in sunshine or in rain.