With the new 2012 version, we can now use webmail services to send invoices to our clients.  I have tried it with a rogers/yahoo account and also with a gmail account.  It works great.  Hooray!  We are not forced to use Outlook.  QuickBooks creates a pdf file of the invoice and attaches it to the email.  It seems to work better with the new pdf converter that is installed with 2012.