Abstract Information technology has been considered the greatest innovation of the new era because it has a lot of fruitful social economic and scientific impacts. Regarding the economic effect, information technology has been of the essence into bringing the E. marketing into existence. The main purpose of this study is to investigate the effect of information technology in E. marketing. The data are gathered in different ways: from the balance sheet and income statement of the companies; from government agencies; from a questionnaire among the E. Marketing users, E. marketing designers and the suppliers and the effects of information technology in the literature. The analyzed data and the review of the literature both manifest the following effects made by information technology: providing the opportunity at every place and time for advertisement; increasing the overall potential of advertisement; increasing the income for the companies; and decreasing the pollution and energy consumption.