Hey, @GhostMech thanks for your reply, I found a solution online.

Mail::send()

Method does not return anything so in my case when I'm using it inside the if () statement it never returns anything true so by default it returns false. That's why I am getting the else () statement returned.

So in order to get something like this to work, you would have to use an if() statement like this

$post = (object) $_POST;
Mail::to($post->email)->send(new OrderReceived($post));

if (count(Mail::failures() < 0)) {
    echo "Thank you mail sent";
} else {
    echo "There was an error";
}

Mail::failures

Returns an array of failed recipients

Just in case anyone else runs into this problem.