For a number of years now, I get a sporadic random bill from AWS for $0
Yes, all the headers and links in the email look legit.
I no longer have an AWS account. Deleted it aeons ago. There doesn't appear to be any way to tell Amazon to stop sending these.
All attempts lead to … log in to your account first, or recover your account then log in.
I haven’t any account. Recovery of nothing resulted in nothing (except more $0 bill notices).