I have a very basic question. I am not sure if this is the best place to post. Please move it if needed.
I have flown a Lufthansa flight economy between FRA and ORD in Sept in Class X.
Am I eligible for miles on United for this?

I have flown 3 emirates flights in Sept between India and Europe in economy class booked via Emirates.com. I have the boarding pass, not sure about the class, can I get miles on United?
I prefer miles in United as I live in the US.