The thesis deals with project data boxes, which was launched in 2009. The aim of this project is electronic communication between public administration, local government and natural or legal persons. Data exchange system is one of the basic elements of e-government is used to send and receive data messages. Thanks to the legal framework of the data report elevated to the same level as registered mail with legally essential effects. The main part of the thesis, excluding the current legislation, the analysis of the recoverability of data boxes at Moore Stephens Ltd. and the proposal of appropriate software solutions for optimal utilization of the data mailbox and archive data messages. We were also examined possible system errors and any sug...