I read this article: http://developers.marketo.com/blog/restrict-free-email-domains-on-form-fill-out/
but when I add the html snippet it's not working. I also tried adding to template level, but not working as well. I am using form 2.0.
I would like to only accept business email addresses on a landing page. So I would not want to edit the template. Any idea how to prevent certain email addresses in the email form?