In addition to selecting the Secure the domain name option, we also recommend selecting the following options:
Include a "www" subdomain for the domain and each selected alias
Secure webmail on this domain
Assign the certificate to the mail domain
Note: Securing webmail cannot be done during the 2 hours following domain creation, because it requires an Apache restart. Apache restarts every 2 hours, so if you're setting up SSL on a brand new account or a new domain that's just been added, you will need to return to these settings later to activate the webmail security feature.
Click on the Get it free button to install the certificate.
You should see that Keep websites secured is now Enabled
We also recommend activating the Redirect from http to https option
Troubleshooting
If you have issues with the Let's Encrypt SSL certificate on your domain or subdomain, here are some things to check:
If after following the above steps, waiting a full 2 hours, and clearing your cache, the problem is not fixed, please post a topic in the Customer Support forum. Make sure you provide your username, domain name, and any applicable error message(s) received.