We do our best to include tools in Mailchimp that will help protect you from scammers and spambots. Google reCAPTCHA is a challenge-response test intended to prevent spambots from adding fraudulent emails to your audience.
In this article, you'll learn about different types of reCAPTCHA and how they're used in Mailchimp.
Google reCAPTCHA is a system designed to tell humans and computers apart, so bots can't fill out forms maliciously on behalf of a human. The CAPTCHA acronym stands for Completely Automated Public Turing test to tell Computers and Humans Apart.
In Mailchimp, reCAPTCHA helps prevent bots from adding fake or malicious email addresses to your audience. There are two types of reCAPTCHAS: checkbox and invisible.
This type of reCAPTCHA requires new subscribers to check an "I'm not a robot" box. If you've enabled double opt-in and use an embedded or pop-up form, this will appear after your subscriber clicks the link in the opt-in confirmation email.
This type of reCAPTCHA does some additional analysis behind the scenes. It doesn't require new subscribers to check a box, and will only present a visible CAPTCHA if it detects it may be dealing with a bot.
The type of form you're working with determines which reCAPTCHA you'll use.
Embedded or Pop-Up Forms
Landing Page Signup Form Blocks (Single opt-in audience)
Landing Page Signup Form Blocks (Double opt-in audience)
ReCAPTCHA is only required for Mailchimp-hosted signup forms, but we recommend you enable it to protect your audience if you use embedded or pop-up forms, or landing page signup form blocks.
To enable reCAPTCHA for your audience's embedded, pop-up, and landing page signup forms, follow these steps.