My website has a contact form, and I was getting spam so I implemented CAPTCHA protection.
- I tested my implementation and it seems to work for humans, meaning that I am able to use the contact form.
- But how to check the behavior of the form for spam bots?
I could write a bot or configure an off-the-shelf bot, but:
- I am not a specialist, so it would take me a lot of time
- I would get banned by the CAPTCHA service, probably by IP, probably also via browser+OS+etc identification and other technical measures that I have never heard of.
Gratis, ideally open source.