Our email address is firstname.lastname@example.org.
Past info such as friends renamed or deleted cannot be retrieved but we will start tracking changes to your friend list once you will be logged in to our site. Remember that your profile must be public.
Steamfriends.info uses Steam's official OpenID interface to authenticate your Steam account. In this process you sign in with your username and password on the Steam servers, after that the Steam server tells us if you logged in successfully and returns your 64bit Steam ID. Your user credentials will not be shared.