A newsletter is a specific form of information sent to the customer via e-mail. Up to now, all newsletters have been presented in the form of graphic files with detailed texts. The whole informed about upcoming promotions and new products introduced on a given website. This most often applies to online stores and websites promoting various services. Recently, we can often meet with the statement that the entire IT industry is looking for new ways of effective e-mail advertising and that traditional newsletters are about to become a thing of the past. Why is it happening?