This solution does solve the problem however, there is a problem with it.  We use Quickbooks for our payment processing and when the email is generated and sent through Outlook, a blue "View and Pay Invoice" button is on the bottom of the email.  Customers click on that button and it opens a web page for them that they can use to pay their invoice.  You lose the "View and Pay Invoice" button when using webmail to send instead of Outlook.  Not a workable solution for our company as I've just gotten my customers conditioned to using the Pay Button and don't want to change that.