To setup Sparkpost for integration with EmailElement, you'll need:
At least one Email Sending Domain setup
A valid API Key
Add and Set Up an Email Sending Domain
Log into your account and select “Configuration”, then Domains > Sending Domains tab
Click “Add a Domain”
Click “Save and Continue”, which will then prompt you to select Strict or Relaxed alignment (choose Strict if not using a subdomain), and click “Save and Continue” again.
Once your domain has been added, you will get the DNS records you'll have to add to your domain.
After you have added these records, click “Verify Domain”
Create a New API Key
Select the “API Keys” section and choose “Create API Key”
Enter your API Key Name and click “Create API Key”
…
And that's it! You're ready to add Sparkpost as a Send Integration in EmailElement!