The liberalisation of infrastructure sectors through opening up markets as a method for increasing the efficiency of infrastructure services is an international tendency. Emerging competition has been seen as an essential element in this process. On the other hand, the liberalisation of the market for universal services can cause several problems in ensuring quality and access to services. In this article we evaluate the results of liberalisation in the Estonian postal sector as an infrastructure specific sector offering a universal service in a decreasing market in a small country.