For “random websites” there are laws around cookie approvals. For emails, you can’t drop tracking inside that can follow you around, at best you can determine

For “random websites” there are laws around cookie approvals. For emails, you can’t drop tracking inside that can follow you around, at best you can determine an email was opened (think certified mail, for an IRL analog) If you don’t want your friends sharing your contact info that seems like a problem between you and your friends. Sharing contact info without direct consent is not a new problem in the internet age. That’s been happening forever.