On msn, which I use quite often to chat to friends etc, I have noticed some of my 'contacts' are on msn with email addresses such as @ntlworld.com and @btinternet.com I always though to sign into msn messenger you needed an msn.com/hotmail.co.uk/hotmail.com email address.
How do these other addresses get to sign in and is it possible for me to sign in to MSN with my Gmail/googlemail.com email address?
Have tried but get an error message
