Legislation is considered as an important factor in progress of electronic marketing. Since E-Marketing reduces the costs of advertisements and marketing, it has considerable importance. Electronic marketing is one of the methods of FCR. However, enterprises will not be persuaded to e-marketing unless the digital environment of e-marketing is technically and legally safe. A part of this obligation should be performed by Law. Since this important issue has not been studied in Iranian legal literature, this article tries to answer these questions by analytical and comparative method and study on Iranian Law and several selected successful countries: How do the regulations of e-marketing have effect on FCR? And does Iranian Legal System fulfill suitable safety for digital environment?  The hypothesis of this article is No; i.e. Iranian enterprises cannot use electronic marketing in order to reduce finish cost  because of legal faults of Iranian Law besides of non-legal factors. It constitutes three sections: the first section surveys the basic concepts of the article; the second considers legal requirement for safety of e-marketing and the experiments of several successful countries and the third, criticizes the position of topic in Iran. Finally, it suggests suitable and practical solutions to the legislator and beneficiary organs.