To change the default sender email address, you first need to change the Outlook default data file to the business account. Follow the steps below:
- Open Outlook.
- Select File in the top left corner.
- Select Account Settings and then select the Account Settings... option from the dropdown menu.
- Navigate to the Data Files tab.
- Select the email that you want as a default.
- Select the Set as Default button.
- Close and then re-open Outlook.
- Start an email from Smokeball. It should go to the email you selected as default data file.