We wrote this when clients were reporting hundreds of bogus contact forms were getting past Honeypot, but did not want to add a captcha that would impact conversions.
This lightweight script has been extremely effective for eliminating Contact Form 7 spam messages. It does not pretend to be a complete anti spam solution.
If there is demand we might extend it to work with other forms, including comment forms. Please report any feedback and false negatives/positives on our support form at http://www.lilaeamedia.com/contact/
Please report any feedback and false negatives/positives on our support form at http://www.lilaeamedia.com/contact/
After I installed this, no test message I tried to send myself would go through. Every attempt was met with the orange-border error message, indicating a spam fail.
My comment blacklist was empty, so that couldn't have been the cause. Plus, the same message worked fine after disabling this plugin.
Besides, Contact Form 7 added nonce verification in version 3.1, so I guess I shouldn't need this anyway.