Step 2: Sign up for the CAPTCHA service of your choice. 

Then copy and paste the unique site key into one of the following, depending on the service you’re using.


    • WWW_CLOUDFLARE_SITEKEY for Cloudflare Turnstile, or
    • WWW_HCAPTCHA_SITEKEY for hCaptcha, or 
    • WWW_RECAPTCHA_SITEKEY for Google reCAPTCHA.


The *_SITEKEY values above may also be configured in site.cfg or go.user, in the same format as shown in Step 1 for WWW_CAPTCHA_BADGE.

NOTE:  LISTSERV does not support Google ReCAPTCHA v3.  If using Google ReCAPTCHA, you MUST use ReCAPTCHA v2, preferably the check-box option.