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I'm pretty sure clicking the unsubscribe button says "hey, this email address you obtained is real and active!"

• rconti 9y ago
  That feels very "20 years ago" to me. They've got plenty of other ways. Don't get me wrong, I'm a bit careful with them but because I'm used to being signed up to lists by a handful of stupid people who don't know their email address, I can basically anticipate what regions of the world my spamlists will come from, and I generally have a good feel for what's legit or what's not. I use the unsubscribe link often for these things.