I am having the same issue I posted 6 months ago---again.  When I edit emails to go out from Quickbooks before sending them, it won't keep the edits and just sends the default text to my customers.  I thought it was fixed until yesterday when a customer replied to my email.  I notices that none of my customized text had saved.  Completely frustrating.  I already know the work around for this.  But it's 2 or 3 extra steps and takes more time for each invoice I send.  I have to edit the email by saving it and bringing it into drafts through Outlook.  I thought an update fixed this problem, but it is now happening again.  Super frustrating.