Unauthorized nameless dispatching of e-mail letters is called spam. In two or three years junk e-mail has become a sharp problem the currency of which increases. Each day there�re sent from 5 to 10 billion spam messages around the world. Moreover, specialists claim that this number will steadily increase and after two years it will increase in 2 times. There is a big market that provides its customers with spam attendances and has ripe structure and system of work distribution. There are several layers of such markets as sending attendances, collectors without addresses and software producers. There�re also companies that unite a few occupations. Amateurs may publicize their personal corporation instead of outer clients. And occupational companies perform contemporary junk e-mail services with qualified workers, contemporary facilities and juridical assistance of their business. Nowadays Microsoft Outlook program is also provided with Spam Blocker for Outlook. And we should speak about