Have any kind of form on your site? Something like a survey or a contact us page? Ever had a bot come by and spam your web admin email account by automating the submission of these forms? Well, recently this began happening to me, so I began looking for a way to stop it. I came across this great free tool created by the Carnegie Mellon University to help them digitize old texts and store them in electronic form for future preservation. See http://recaptcha.net/learnmore.html You've seen those forms where you type in the word you see in a distorted image, to prove you're a human (computer image recognition software has a hard time scanning and 'reading' the distorted words in these types of images). Recaptcha does that, using two words. I integrated this into my contact us form on my site. I haven't had a spam email since. Try it out, and let everyone know how your results fare, or speak up if you have other good suggestions for a solution to this type of problem.
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