Im not sure, i think this means, that smtp is not started on windowslive.com (198.247.174.88), so i scanned the IP without pinging and i saw that there's only skype (p 433) and site - apache (p 80) running, but no smtp... So i think that it could be POP or IMAP (the mail protocol) --> http://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol
I think that helped!
GL!