I receive emails intended for a person who shares my name. This gentleman happens to be an accountant, so I get lots of W2s from wealthy people -- I don't look

I receive emails intended for a person who shares my name. This gentleman happens to be an accountant, so I get lots of W2s from wealthy people -- I don't look on them, but the sender like to provide executive summaries in the body. I usually just tell them, this is not the mywittyname you're looking for. But he has also signed up for other services using my email, which is concerning. I actually moved away from $myname@gmail.com to $random_7_characters@gmail.com due to fears that I may lose the former somehow. Nobody seems to think twice when I tell them my email is (like) hrtd435@gmail.com, so I guess it's either common, or people get why I do it.