New ask Hacker News story: Ask HN: Why not verify users by making THEM send emails?

Ask HN: Why not verify users by making THEM send emails?
4 by popcalc | 4 comments on Hacker News.
Email delivery (if you don't want to end up in the spam folder) costs $ these days. So why not turn the tables and generate a random string and put it into a mailto: link that the user is prompted to open? If your email server picks up the string anywhere in the body it confirms the user registration. Bounce rates would go up but depending on your CLV and CAC this could be highly economical.

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