Today, most educational institutions are recognized on the Web by their .edu Internet addresses. However, not all institutions that use an .edu as a part of their Internet address are legitimate institutions. Before the U.S. Department of Commerce created its current, strict requirements, some questionable institutions were approved to use an .edu. The current requirements allow only colleges and institutions accredited by an agency recognized by the U.S. Department of Education to use the .edu, however, some more suspect institutions have maintained the .edu addresses.
Beware: Institutions that were approved to use an .edu before the new requirements were put in place may still be using the .edu as part of their Internet address. This means there may be some illegitimate institutions out there with an .edu. Whether an institution uses an .edu or not, it’s important to know as much about the institution as possible before enrolling.
Source: U.S. Department of Education