Empty e-mail body using drupal_mail
Try this : 

function changeme_mail($key, &amp;$message, $params) {
  switch ($key) {
    case 'information':
      $message['subject'] = $params['subject'];
      $message['body'][] = $params['body'];
    break;
    }
}


$message['body'] is supposed to be an array as defined here so I changed $message['body'] to $message['body'][]