I've had a similar experience quite recently. I started getting legit automated emails for someone named "John", some emails regarding an effort to buy a house,

I've had a similar experience quite recently. I started getting legit automated emails for someone named "John", some emails regarding an effort to buy a house, others from a doctor's office. Some of the emails looked rather important, such as doctor appointment details, so I engaged in some Internet sleuthing, and in a few days I found the person. They were an elderly gent who had the same Gmail handle as me, but his with a numeral suffix. I tried emailing the gent to explain, but received no reply. So I've just been forwarding those emails to the fellow's real address when they arrive. Perhaps he never checks email, hence his lack of reply to my earlier note, but I forward just in case.