Thank you for the swift reply. I just checked the UI on a new dummy form and it looks like that will indeed sort out the issue by allowing me to set the reply-to address through the UI.
I am unable to interact through the UI with the email settings on the main page for some reason (hence the new dummy form) but if worst comes to worst i can just remove all of the email code from the main page and re-do the email processing again using the UE UI (including setting the reply-to address) in order to get everything coded correctly (i trust your coding much more than mine haha).
Regadless you can consider this one resolved. Thanks again for the swift reply.