im running a windows 2003 server (and a xp pro for development) but i cant run cdosys on either of these, they both come up with an internal server error

i think im trying to send through a port but im not sure, the whole smtp thing confuses me, i have seen someone use an external smtp server before but i dont really know what i need to do (if i want to or not).. if i could put a to, from, subject, body in a form that would be the ideal