G Suite Marketplace offers a wide range of quality enterprise apps that add functionality and features to native Google Cloud apps. Mailmeteor is a verified G Suite add-on. To use Mailmeteor you need to install it first on your domain.
A domain is what comes after www. in web addresses. This is probably your organization's name, followed by .com, such as yourbusiness.com.
You need to be logged in with your G Suite admin account to the Marketplace.
Click on the "Domain Install" button
A consent popup appears, click on "Continue"
Choose the domain on which you want to install Mailmeteor. Below, the demo domain is named "Your domaine name"
Review permissions, tick the Terms of services box, and click on "Accept"
Mailmeteor has been installed, click on "Done"