As an alternative to confirmation emails to prevent spam a client-side spam prevention method, such as reCAPTCHA or a maths hook should be available. ## <bountysource-plugin> --- Want to back this issue? **[Post a bounty on it!](https://www.bountysource.com/issues/4335286-add-recaptcha-or-a-maths-hook-to-subscription-forms?utm_campaign=plugin&utm_content=tracker%2F645044&utm_medium=issues&utm_source=github)** We accept bounties via [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F645044&utm_medium=issues&utm_source=github). </bountysource-plugin>