mosparo is the modern spam protection system for your forms. mosparo will catch the spam messages before they get sent to your inbox. It is usable by everybody - except robots - and is open source and free to use.
Seems like they basically match the form fields (and meta data like IP address and user agent) against some predefined rules. I don’t see that this would work reliably to prevent spam from robots.
Seems like they basically match the form fields (and meta data like IP address and user agent) against some predefined rules. I don’t see that this would work reliably to prevent spam from robots.