If you regard all unsolicited e-mail that you receive as being part of a scam which someone is trying to work against you, you won't be far wrong.
If your e-mail address(es) are public anywhere, they are open to being farmed and used against you in a scam.
If there is information about you which can be linked to your e-mail address(es) then you can potentially be lulled into a false sense of security that an unsolicited e-mail is about what it actually says, because it mentions something which is relevant to you.
There is a lot of coded communication in scam e-mails. The prime one is "I want to give you some money" means "I want to take as much money as I can away from you".
And never, ever, ever, try to scam the scammer. Even replying to the e-mail will make things worse, because you will be listed as someone who has responded to a scam e-mail - so you'll get more. If you want to go further than that, just remember that their job is to rip you off, and you are just an amateur at attempting to do it to them.