This free extension should be installed on every Magento store. It blocks spam in: The contact form Product reviews User signup Newsletter signup No Captchas - it's a bad user experience to need a Captcha when making that initial contact (contact form), potentially blocking a sale, or when submitting product reviews (who wants to spend more time than possible submitting a product review for a company) And we don't want, as business owners, to have to filter hundreds of spammy messages or reviews before we can read the real ones If you're using a custom contact form you might need to customise this a bit As this is a community extension we don't offer support for it, but if you find a bug or add an improvement please email us details and we'll add it to the next version