A presentation of services of the Slovenian national postal operator is given for two market segments: the direct mail and periodicals market and the direct mail market. Three findings are highlighted in particular. First, the price elasticity of demand on both markets is below zero. Second, the analysis of demand functions for direct mail shows positive cross-price elasticity of demand with regard to price fluctuations for TV commercials, and with regard to price fluctuations for advertisements in magazines and daily papers. And third, coefficients of income elasticity of demand for direct mail services show that the total number of mail deliveries on the direct mail market increases faster than the retail revenue in real terms.