October 9 is known as International Post Day.

Postal services are the oldest and most widely used services. They were born together with humanity, as a necessary need of communication between different tribes, provinces and regions.

In the early period, they were realized in different forms, using the natural relief and geographical positions, using sound signals, fires and other forms.

With the development of human society, communication methods advanced, messengers who moved on foot began to be used, with whole days for sending the news, horn signals, drums, light signals began, which also constitute the beginning of the organization of the postal service.

The first document of the postal service has been found in Egypt and dates back to about 255 years before the birth of Christ. According to this document, the postal service is present on all continents in the form of messages, for their delivery it took days and months to travel from one continent to another.

This type of service certainly came to be perfected as a necessary necessity of universal communications, where horsemen and horse-drawn carriages began to be used, and in special cases accompanied by other forces.

In this period, the speed of sending messages and the protection of messengers took on special importance. In many countries, messengers began to be accompanied by the means of the time, relaying the news in the form of a relay until reaching the destination.

In these moments, the now irreplaceable symbol of the messenger (today's mail carrier) is actually configured, which is now the hand-to-hand transmitter of all written messages, messages that even today's modern technology could not replace.

With the birth and development of the capitalist system, the postal service became a special necessity of communication between countries that now had rapid industrial development.

The rapid growth of various sectors of the economies of various countries, mainly developed ones, was also accompanied by the great density of documentation.

Another special symbol is attached to the postal symbols, special vehicles for the transport of mails with emblems and recognition symbols for the public. The demand for high-speed communications between countries on different continents increased the cost of this service. At the same time, written communication between people began to grow rapidly as the only way of communication between them.

Under these conditions, the definition of universal communication rules and payment methods was born as a necessity. At the beginning of the 17th century, the exchange of postal deliveries between countries began, based on bilateral agreements between them, but the way of paying for the service continued to be a concern due to its high costs.

The introduction of new communication technologies between countries and people dictated the need for further improvement in postal services around the world, moving to the use of modern technologies also for the realization of postal services, which very quickly influenced the increase in the speed of movement of postal facilities.

Despite the great speed of development of electronic communications, the role of mail continues to be present everywhere in the world as an indispensable and widely used service in every country.