grrrrr

sites/all/modules/gui/materiobasemod/materio_user.module

@@ -662,14 +662,14 @@ function materio_user_mandrill_mailsend_result($result) {
   if ( in_array($result['status'], array('rejected', 'invalid', 'error')) ) {
     // remove email from pool
     module_load_include('inc', 'simplenews', 'includes/simplenews.mail');
-    simplenews_delete_spool(['mail'=>$result['email']]);
+    simplenews_delete_spool(array('mail'=>$result['email']));
 
     if ( in_array($result['status'], array('invalid')) ) {
       // unsubscribe user if mail does not exists
-    //   $subscriber = simplenews_subscriber_load_by_mail($result['email']);
-    //   if ($subscriber) {
-    //     simplenews_subscriber_delete($subscriber);
-    //   }
+      $subscriber = simplenews_subscriber_load_by_mail($result['email']);
+      if ($subscriber) {
+        simplenews_subscriber_delete($subscriber);
+      }
       // disable user
       $user = user_load_by_mail($result['email']);
       $user->status = 0;