Captcha module still allowing spam to be posted

[demafkees]

Hello everyone,

On one of our customers website we use the CGFeedback module, to enable visitors to comment on, for instance, newsitems (Example: http://www.zigt.nl/news/1650/76/Nieuw-M ... nds-Glorie Click on "Reageren" to see the form).
However, despite there being a captcha installed, alot of spam messages get posted. The only captcha library that seems to stop spam from coming in at this point is the "recaptcha", but as you can see recaptcha would rip up the layout due to its size.
How can we stop spam from being posted without using recaptcha or having to moderate comments?
Thanks in advance for your response!

[uniqu3]

Using Captcha doesn't mean it is 100% reliable, spam bots are smart enough to read captcha images as well.

[manuel]

If they go trough enough trouble to bypass your regular captcha, i suppose a "checkbox captcha" wouldn't help either?

I usually use "hn_captcha" and make sure to change the "secretstring" from "A very, very secret string which is used to generate a md5-key!" to something long and random...

Greetings,
Manuel

[demafkees]

Hi Manuel,

Thanks for your reply. I have tried hn_captcha in the past but never changed the secret string. I have now changed the secret string to a random generated string of 24 characters long, and set the amount of characters the visitor has to type to 8.
I will let you know if that solved the problem.