Opt-in

Card Puncher Data Processing

Type

Double

Double opt-in is a way to stop human spammers.

Email verification can be a barrier to users subscription. If they sign up with a fake email, it mostly just hurts them (they won't receive updates or password reset emails). Other rate limiting and abuse detection for multiple signups can be developed.





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Recaptcha
Security - Bad Bot (Spambot, Attacker )

Bad Bot are robots / user (attacker) with bad intentions. They walk through pages trying to find a form and to fill them trying: to send email in mass to create a fake account (to be able to crawl...



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