We recently installed a network with approx 40 users. We have not brought in a higher bandwidth line for Internet connectivity yet. Those who currently have Internet access and email are doing so through a dial-up connection to our ISP. My question is, once we bring in the faster line and give everyone access to the Internet through the network, should we purchase a seperate mail server or can we use our ISP to host our email? If both will work, what are some of the pro's and con's of each?