Finding the detail of the person, with the help of E-mail address it can utilize another method of being called the E-mail investigation of opposite. This makes in order to find the beginning of the crime of mostly cyber with the specialist of enterprise. Therefore due to the help of the E-mail of opposite, when one user name, Internet service provider (ISP), geographical position, Internet browser, contact and the like of the report of abuse of the operating system removes that address, it can find and inspect.