Can you specify an account for third party mail calls?

I have two mail accounts, business and personal set up. Both work fine. I e-mail invoices from Quicken using the “send via e-mail” function, which always opened a new message using my business account. After upgrading to 7.0, it now gives me a list of accounts in a drop down box. Sadly, my business account isn’t first on the list so now we have to remember to select the account. Is there any way to make it default to a certain account?