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Ask HN: How can I have companies reveal where they obtained my personal data?

• luke2m 5y ago
  Not for personal data in general, but I have a catch all on a domain set up, so when I set up some account, I use the email foobarcompany@mydomain.com. If they share my email, I know where it came from.
  • mikecoles 5y ago
    I do the same. One company that I was asking about parts availability told me to stop using their domain name in my email address as it was 'creepy'. I chuckled and moved on. At least there was a person in the loop.