We moved all of our clients away from Webflow’s form handling solution. It’s been too unstable, too poor at SPAM handling, and has the added problems of the unsubscribe link and unbrandable email notifications.
We chose Basin on the recommendation of @webdev and it’s been fantastic. It costs a little bit, but you can run multiple clients on the same account under different projects and that works well for us.
If you are using Webflow’ success & error messages, we’ve built a way to use those as well with a NOCODE attributes-based library.