The official “reCAPTCHA plugin” provides CAPTCHA support for MyProBB.
However, MyProBB has plenty of other anti-spammer features available built into the default forum:
Essay question: Why do you want to join this forum? Moderator approves the answer.
Profiles are private unless made public. All profile changes are moderator approved.
E-mail address domain blacklists.
Number of accounts that can be created in a day are limited.
And much more.
This page belongs to the feature documentation of