Client currently has a plain HTML form on their website that submits data to a separate results page on their website. The entire website is not secure (HTTP). Client wants a custom button in Salesforce Lightning Experience to submit account information to this results page.
Refused to frame 'http://scan.upsource.com/scan/results' because it violates the following Content Security Policy directive: "frame-src https: mailto:"
My question: If they migrate their website to HTTPS, then will this form submission be allowed?