Welcome to the Community, @andy30.
You can set up your email service with QuickBooks Desktop so you can send invoices using a different email address. Let me guide you how.
You have the option to set up your email address through Webmail or Outlook. Here's how:
- Go to the Edit menu.
- Select Preferences.
- Choose the Send Forms from the left panel.
- In the My Preferences tab, select the email service you want to use.
- Click Add, then enter the Email Id.
- Select the Email Provide from the drop-down.
- Click OK, then select OK from the Preference window.
Here's an article you can read on for more details: Set up Email Service.
You might also want to read this article to verify that an invoice was emailed and read by customers.
Please don't hesitate to leave a comment below if you have any other questions. The Community Team and I are always here to help.