Win Web Hosting

not sure exactly what you are trying to do.. but if you are running a local mail server at home and also have a website at say foobar.com and you want to use foobar.com for emails like johnsmith@foobar.com then you would have to forward port 25 and port 110 to your local server.. and also setup the config file for your mail server.. you would also have to edit your DNS entries and add your IP address for your local mail servers.. so mail routes through say 24.24.24.24 (or whatever your IP address is through your ISP)