Hi,
I'm not sure I understand the issue correctly - are you saying that the emails are getting sent but are not displaying the correct Approved/Rejected view? Or are the emails not getting sent at all?
To send emails from the InfoPath client, you'd first need an email submit data connection (obviously). In your Approve/Reject button, your rules should first switch to the view that you'd like to include in the email and then proceed to the actual email submit.
Hope this helps; otherwise, please provide more information so we could understand your needs.
Cheers!