Who is your email provider?
Who is your email provider? Normally the whole point of the iCloud and Apple IDs is so you can sync between your computer and devices so you should use the same for both but you can use different ones though I don't know why you would. Just go to System Preferences/ iCloud and sign out then sign in to the account you want to use. You can also just add other email accounts in Apple Mail too. You have not lost anything... I can remote connect and show you.