One of the most common ways to send SPAM messages is the abuse of unprotected forms. More specifically, there are dedicated tools that automate the process of filling in/repeating a form, thus allowing the sending within a few minutes of thousands of emails (read: SPAM).
How can a web form be protected?
- validation of each field in the form
- adding an action that requires human intervention. Specifically, it is about recognizing a number/text in an image. Such validation is used in the HostX contact form.
