People who know me tell me who they are; otherwise I'm not going to bother to contact the person.

But curious, what does 7,4,3 spell out?  I'm not getting that

my spam folder.  I figure some of the websites I have visited while hobbying are capturing my email with cookies and selling it to other dating/sex sites.  I usually delete without looking in case there's a virus attached.

girls that I thought were independent, but they apparently gave my contact info to a manager or other girls. I get one or two a year via text or email. I respond the same way you do, that is, tell her she has the wrong guy and we've never met. They're not pushy and quickly move on. No worse than the guys calling every day to sell me solar power or some other home improvement I don't need

Maybe hacked of perhaps one of the providers you've seen (or one you've used their website and provided the email there) was hacked an you IP address was exposed -- that allows some fairly accurate geolocation searches.

Might consider changing the email address, or not.

Many of the websites, some even provider websites that we click on that are visited will install malware in your computer giving them your email accounts, location, and other information you may not want to be exposed. I never - ever open any spam in email as this could be a spoof, or a trojan, or malicious malware that could harm your computer and compromise your private information.