You set a default return address when you create a Docsmit account but you can change the return address during the order process. To do this while you're composing a message, click your email address in the From: field on the UI:
Enter the desired return address and "Save".
You will get a brief message that tells you the updated address was saved and you can continue with the order process.
If you have any questions, email us at email@example.com.