Hi,
It would be nice to have a reply to adress in the forms settings. It is time consuming to copy and past the customers email adress just to answer when receiving from forms.
Perhaps it is possible today? I could have missed something 
I’ve not actually tested this myself, but this is from the manual…
You need to use your own email address as the “From” address because the mail server will only send messages that come from an address it recognises.
If we used the visitor’s email there, the message might get blocked. The usual way around this is to keep your own address as the sender, and then set the visitor’s email as the Reply-To.
That way the form email always gets delivered, and when you hit reply it goes straight back to them — this is how Forms work in Elements.
In order for Elements to correctly set the “reply-to” header in the outgoing email, the form field name must be set to email, all lowercase.
@ben should be able to offer more guidance on this if you get stuck