Index: simplenews.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/simplenews/simplenews.module,v
retrieving revision 1.220.2.19
diff -u -p -r1.220.2.19 simplenews.module
--- simplenews.module	23 Jan 2010 10:28:20 -0000	1.220.2.19
+++ simplenews.module	23 Jan 2010 21:20:35 -0000
@@ -429,6 +429,14 @@ function simplenews_nodeapi(&$node, $op,
       if ($result) {
         drupal_set_message(t('Newsletter %title was deleted.', array('%title' => $node->title)));
       }
+
+      // Check if pending emails of this newsletter issue exist and delete these too.
+      $pending = simplenews_get_spool(SIMPLENEWS_SPOOL_PENDING, $node->nid, $node->vid);
+      if (!empty($pending)) {
+        simplenews_update_spool(array_keys($pending), array('status' => SIMPLENEWS_SPOOL_DONE, 'error' => TRUE));
+        drupal_set_message(t('This newsletter had pending emails, they can no longer be sent.'));
+        watchdog('simplenews', 'Newsletter %title deleted with pending emails. Emails can no longer be sent.', array('%title' => $node->title), WATCHDOG_ERROR);
+      }
       break;
     case 'load':
       $node->simplenews = db_fetch_array(db_query('SELECT * FROM {simplenews_newsletters} WHERE nid = %d', $node->nid));