Hi Bj,
I'm not sure how the actual text entered in to your form is getting written to the waue_landing_3-1.php file. This isn't usual behaviour (in my very limited) experience.
The waue_fileneme_1.php should look the same after sending the form as it does before, apart from the form bindings, (if you haven't used a template).
So if you are not using the 'create a file for your email:' but just using the 'edit' box (and adding the values dynamically from the form's fields in the bindings panel) the MailBody variables lines should look like something this (but reflecting the form fields)
$MailBody = $MailBody . "";
$MailBody = $MailBody . ((isset($_POST["message"]))?$_POST["message"]:"");
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . ((isset($_POST["email"]))?$_POST["email"]:"");
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . ((isset($_POST["name"]))?$_POST["name"]:"");
$MailBody = $MailBody . "";
and if you are usinng UE4 and have ticked the 'create a file for your email:' and chosen a template, the MailBody lines should still look like this:
$MailBody = $MailBody . "";
$MailBody = $MailBody . (GetFromPage("templates/Blank_1.php")); /* or what ever template you chose */
$MailBody = $MailBody . "";
I can't think of how the actual entered text from the form would show up in the waue_landing_3-1.php, unless you opened it and entered it there yourself.
Perhaps you could try a new test form using a different template, and do a test send without making any extra adjustment or formatting, to see what happens.