SSL on Cname domains

Hi I mapped my form per cname on my own domain. http://dein.kaufberater.org/90723109558359

Is there a way to get the site to be SSL secure per https?

thanks

Unfortunately, SSL is not supported on custom domains. As an alternative, you can add a webpage on your website and embed the form in that webpage.

Let me know if you have any questions or need any further help.

Reference guide: Embedding-a-Form-to-a-Web-Page