I've had a guestbook on my website for a few years now. Lately it is being flooded by spam. All kinds of posts to buy viagra and other stuff. How do I block this. Already had 50 or so today alone. The captcha doesn't seem to stop these bots.
Have googled for the spam they post. Have found lots of other websites with exactly the same guestbook spam. Some of them where using the Google Captchas and still didn't stop it.
So how do I completely block these spammers????? A few of them even send spam messages through my contact form.
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