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CAPTCHA is one of the best tools WordPress administrators and website owners have at their disposal in their fight against spam, such as spam comments and fake user registrations. Just like every other tool, sometimes it needs to be sharpened and serviced. Some TLC goes a long way in helping you keep the CAPTCHA 4WP plugin performing admirably against spam.
If you have ReCAPTCHA configured on your WordPress website, but you’re still getting spam, this article is for you. We will start with a brief introduction and some background information into how CAPTCHA works before delving into step-by-step instructions of actions you can take to limit spam.
Introduction and background information