Add Delivery server - How to get Elastic Email API Key?

1. For sending emails via API using Elastic Email, you need an Elastic Email "Email API" account. If you are not having an account, create one.
2. Login to your Elastic Email account and navigate to  My Account > Settings > API > Manage API Keys  
3. Click on Create button to create a new API Key
4. Give a name for the API Key. You can enter something relevant so you can identify why you have created this API key in future. 
5. Choose "Full Access" under permissions.
6. Click on Create to create the API Key.
7. Copy the API Key and paste it under Elastic Email API Key section in Add Delivery server page.