i'm using your great form for a few years now. I am a teacher at a primary school in the Netherlands and your free contactform is perfect for us. I use the latest version of the form (18.104.22.168).
Unfourtunaly the form has a error since a few weeks.
I get a HTTP 500 error. THey say it is a internal server problem. But everything else works perfectly on my site and i didn't change anything with the contactform.
I hope you can help me.