You can change your from email address using below steps.

1. Open the Moon Invoice application on your device or tap on this link.
2. Go to Companies > Email Templates.
3. In the Settings tab, click on the Edit icon of the email.
4. Enter the new email address you want to use for sending emails.
5. A verification email will be sent to your new email address.
6. Once verified, you will be able to send emails using the new email address.