Possible decrease of spam in the email communication

The problem of spam has great impact on the Internet users, it questions safety and usefulness of the use of electronic mail, its cost and time consuming, as well as the effectiveness of the Internet in general. In this work authors analyze cost of spam and its law regulations (in Croatia and Europe) and with case report and simulation they are trying to answer several questions: is there decrease of spam in last few months and what are possible reasons; is there more spam because of the users´ risky behaviour; is there more spam because email addresses are put on a web site; is email user obligated to receive spam; is there more unwanted mail on free worldwide known email services? Most of the nowadays research on this subject gives algorithms and software solutions as new improved spam filters, but this work analyses users´ behaviour and different regulatives. As there are law regulations and technical solutions like spam filters on both users´ and providers´ side attention should be paid to users´ behaviour and their awareness on how to ignore spam and by doing this to suppress spam in the longer period of time.