Once your DNS has successfully propagated you must secure the connection with an SSL certificate which is freely available via Let's Encrypt.
To start, log in to your OnePoundEmail control panel with the details supplied in your service welcome email.
Once logged in, navigate to “SSL Certificates” using the sidebar or search bar depending on the template you've selected.
From the SSL Certificates page, click on the “Free & automatic certificate from Let's Encrypt”.
Select all of the domains being used for your Email configuration. You should only select domains and sub-domains that are pointing to our IP.
Once done, click “Save” and your SSL certificate will be generated.