Index: ubercart/uc_order/uc_order.admin.inc
===================================================================
--- ubercart/uc_order/uc_order.admin.inc	(revision 711)
+++ ubercart/uc_order/uc_order.admin.inc	(working copy)
@@ -1528,7 +1528,7 @@
   }
 
   $params = array('order' => $order);
-  $sent = drupal_mail('uc_order', 'invoice', $recipient, $language, $params);
+  $sent = drupal_mail('uc_order', 'invoice', $recipient, $language, $params, uc_store_email_from());
 
   if (!$sent) {
     drupal_set_message(t('E-mail failed.'));