The modern business conditions in which companies operate today face them with numerous changes that come along with challenges for companies to adapt to such changes in order to survive on the market. The most important changes begin to occur at the beginning of the globalization process, and continue with the changes from the traditional to the digital economy through the digitalization process. This alone leads to the development of an economy based on advanced technology and an economy that is no longer based solely on labor and capital, but on knowledge.Over the past few years, the concept of corporate social responsibility has become more and more important, requiring changes in numerous aspects of their activities. Thus, sustainability is required in an ecological sense, by fulfilling conditions in accordance with the principles of "green" business. The concept of sustainable business changes both the social and economic dimensions, by changing the attitude towards making a profit, which is still the primary goal of the company, but not at the cost of certain social goals. In addition to all the aforementioned changes in the environment, unexpected crises such as the COVID-19 pandemic also occur, which further emphasize the importance of management and the way they manage those situations and make decisions. State-owned enterprises are specific due to their ownership model, which affects the environment in which they operate, as well as the regulation to which they are subject. Regardless of the fact that the operations of state-owned enterprises present on the market could be analyzed in the same way as private enterprises, state-owned enterprises are still obliged to achieve broader social goals than private enterprises and for this purpose often sacrifice the company's potential profit. Postal services in most countries are provided by state-owned enterprises, which certainly affects the way of doing business and the business models of such enterprises. The postal sector is not exempt from the changes faced by modern companies, such as globalization, digitization, the shift to a knowledge-based economy, and the emergence of the concept of socially responsible business. Adapting to new conditions and achieving positive business results in those is the biggest challenge of modern management. In the postal sector, it is crucial to observe the changing trends in the postal services market and, through investments in the process of digital transformation, adapt all processes and services to the new demands of users and the environment in which they operate. It is precisely in this that the role of managerial economics is found, which should anticipate and identify changes and provide management with tools for managing changes and challenges in the environment.