Set up a connection to Mailgun

API guide link: https://documentation.mailgun.com/en/latest/api-intro.html

Link to authentication page:https://documentation.mailgun.com/en/latest/api-intro.html#authentication

1. Name: Required: Name the connection.
2. Connection type: Required: The form will automatically select Mailgun.
3. API Key: Enter the API key. Use the following steps to get an API key.
   1. Log in to your registered Mailgun Account.
   2. Click on “Control Panel”🡪”Security”.
   3. Click on “APIKey” to get your APIKey.
4. Borrow concurrency from (optional): Select another connection from the list....

5. Concurrency level (optional): Up to 25 allowed....