HTTP Strict Transport Security (HSTS) is a policy mechanism that requires all requests to this domain to be over HTTPS and not HTTP. This helps protect your domain and web servers against various malicious attacks and we do recommend that you discuss with your domain administrators having it enabled on your domain.
When HSTS is enabled on your domain, ActiveDEMAND will not serve any requests to your landing pages etc over HTTP, all requests will need to be over HTTPS. To have requests served over HTTPS, you need to reach out to ActiveDEMAND support on chat or by emailing firstname.lastname@example.org and we will enable SSL for your ActiveDEMAND account. There is no charge associated with this.