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Or maybe they should send email to the address their users give them?

• judge2020 8y ago
  A human creating many alt accounts may not be desirable by a website owner, so requiring multiple real email inboxes or running a mail server adds another barrier to prevent spam.
  • Drdrdrq 8y ago
    Not really. I understand why website owners would like that, but it's simply not possible. In the worst case user will use mailcatch.com, aliases or one-time email accounts. No way you can check if the e-mail address is a "real" one. Fortunatelly.
    • Xylakant 8y ago
      You can’t entirely prevent it but you can certainly raise the bar enough to deter a substantial fraction of those signing up multiple times. Whether that’s worth the effort or not it a business decision.