The email system has multiple functions for business enterprises. With a reliable exchange infrastructure, this could be the main medium for internal and external communications. This allows business leaders to send announcements to all employees in any location or even officemates simply exchanging pleasantries with each other. Perhaps, one of the best uses of email for businesses is in the field of internet marketing. An Email list can be utilized to reach out to a potential consumer base numbering up to hundreds or thousands. The marketing team can send updates on new wares, latest price rates or even weekly newsletters. The continued exposure of people to a certain ad is bound to influence his or her decision sometime down the road. This is a very effective advertising method at very little cost. In fact, while most small and medium enterprises would prefer an in-house application, there are free email systems on the web that companies can take advantage of.