Try:
$body = $order."\n".$data1."\n".$data2."\n";
Failing that try
$body = $order
$data1
$data2;
which will probably work, at least the below works for me:
mail("$email", "Title",
"Body
on
many mulitple
lines
even
with
line breaks",
"From: $frommail\n");
😃