(1) We use blat.exe to send mail on Windows from perl. Go to google.com and search on blat to get it.
(2) You will need the URL or IP address of a mail server, or you will need to install and configure one. I have never done installed a mail server, but I think that there is more to it than finding the correct folder.
(3) Your mail server must have mail relaying enabled if it is not located on your machine.