Welcome. hMailServer is a free, open source, e-mail server for Microsoft Windows. It's used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world. It supports the common e-mail protocols (IMAP, SMTP and POP3) and can easily be integrated with many existing web mail systems.
PLEASE HELP!!!!!!!!! If you have a modem with a built in router, you can use it as a wireless (wifi) router. Wifi doesn't cost money as a service. You just need the devices that are compatible with it. Wifi is just a different way of connecting stuff to the internet.
A modem can only connect a single device to the internet. In order to connect more devices in a home -- many of them are Wi-Fi devices, like your tablets or your laptops -- you also need a Wi-Fi router. To make it simple, most service providers combine a modem and a Wi-Fi router into a single box and call it a gateway.