UE4 sending form info

Help
UE
I have a bit of a problem sending a copy of the form data filled in by a user to the user. I successfully get the form data sent to me including the users email address set up to send to me in the BCC area of the setup window.
In the UE setup window in the To: area I have linked the form value of the email address that the user has filled in from the form binding."<?php echo ((isset($_POST["email"]))?$_POST["email"]:""); ?>"
However the user does not get a copy of the sent email.
The UE is not sending the To: recipient the email, as I assume it is not picking up the address from the form.
I have set the email to send from any post. I have no action in the form action window.
On 'Submit" the form sends the info and does not go to another page, just refreshes the current form page.
Do I need to delay the refresh after form submit?
What have I missed?
Can you help
Thanks
David

please send a copy of your page in a zip archive so I can take a look at the code.

Thank you for your reply.
I had 1 more attempt to make it work and I have success.
As much as I couldn't find the fault I think it had something to do with some page code and or syntax or the prevailing wind, I went back a few steps and retried, and it works.
Thanks again
David