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Magento desperately needs captchas on the submission forms. Specifically email to friend, contact us. I’ve tried using Fontis reCaptcha, but can’t get it to work. I’ve tried others, but they don’t work either.
Something built into Magento would be best. A lot of spammers hit the contact form, especially if they see no captcha on the form.
Spam and Bot Protection makes adding a CAPTCHA to your contact, review, account, etc, forms a breeze It comes with a variety of templates and supports both reCAPTCHA and OpenCaptcha as the captcha provider. It also includes innovative features so that your customers are not annoyed by captchas such as only requiring a captcha every X actions that require a captcha.