Idk

ok...don’t know much about ”doing this“ correctl...OBVIOUSLY BUT here’s problem...had a icloud email..got a new phone iphone 8 plus...couldn’t setup old icloud email on phone cuz couldn’t remember the Apple ID or password for it..so have made Apple ID another old email address I had...since could “get” old icloud email set up new one...NOW NEED information hats is in ole iCloud email...trying to setup again on phone but keeps telling me that email address isn’t availabl...duh...reason is becua it mine floating around somewhere...but the default one is still listed in settings..can’t be deleted cuz says that address is how I’m receiving FT and txt..anyone have a suggestion