$input = $ids = $cvalues = array('receipt_from_email' => $params['receipt_from_email']);
$contribution->loadRelatedObjects($input, $ids, FALSE, TRUE);
$contribution->composeMessageArray($input, $ids, $cvalues, FALSE, FALSE);
$input = $ids = $cvalues = array('receipt_from_email' => $params['receipt_from_email']);
$contribution->loadRelatedObjects($input, $ids, FALSE, TRUE);
$contribution->composeMessageArray($input, $ids, $cvalues, FALSE, FALSE);