Before you start creating upgrades, you need to connect with your email provider. You can do this in Content Upgrades > Settings.
There’s a dropdown where you can choose your provider.
Select your provider, then click “Save Changes” at the bottom.
When the page refreshes, you’ll see a new link to your provider at the top of the page.
Click the link to be taken to the dedicated settings page for your email provider. Then there are just a few more things to fill out before you can get started! For further instructions, visit the help article for your chosen email provider: https://bossplugins.com/docs/easy-content-upgrades/email-providers/