Schedule Recurring Email can send recurring emails from any Outlook account that you can send from when using Outlook. 

To do so, when composing the initial email to be scheduled, simply choose the From account desired:

Choosing the From account in an Outlook emailNote that if you don't see the From pull down, you'll need to click over to the Options tab, then click the From toolbar button (highlighted).

One caveat: if you come back and re-edit this email, Outlook will reset the From account automatically.  Be sure to check it and set it each time you edit the recurring email template.