Add the phone, city and newsletter variables to the block of php code below (shown in red)
$envsender = "-f$mailto" ;
$fullname = isset($_POST['fullname']) ? $_POST['fullname'] : $_POST['name'] ;
$email = $_POST['email'] ;
$comments = $_POST['comments'] ;
$phone = $_POST['Phone'];
$city = $_POST['City'];
$newsletter = $_POST['radio'];
$http_referrer = getenv( "HTTP_REFERER" );
Then add them to the block of php code below (shown in red)
$messageproper =
"This message was sent from:" . $content_nl .
"$http_referrer" . $content_nl .
"------------------------------------------------------------" . $content_nl .
"Name of sender: $fullname" . $content_nl .
"Email of sender: $email" . $content_nl .
"Phone number of sender: $phone" . $content_nl .
"City of sender: $city" . $content_nl .
"Newsletter option of sender: $newsletter" . $content_nl .
"------------------------- COMMENTS -------------------------" . $content_nl . $content_nl .
wordwrap( $comments, MAX_LINE_LENGTH, $content_nl, true ) . $content_nl . $content_nl .
"------------------------------------------------------------" . $content_nl ;