diff --git a/UTILS/PutOrders/puo_allorders.js b/UTILS/PutOrders/puo_allorders.js
index 6d36df42ae..112be575c7 100644
--- a/UTILS/PutOrders/puo_allorders.js
+++ b/UTILS/PutOrders/puo_allorders.js
@@ -101,6 +101,39 @@ function send1Order(Bedrijf_key, prs_loc_key, XMLnode, OpdrKey, ordernr, Sender,
         Log2File(1, "====== Skipping actual sending because of puo_flags");
         return false;
     }
+    debugger;
+	// Hoe vaak al mislukt? Steeds minder vaak proberen
+    if (XMLnode == "opdracht" || XMLnode == "bestelopdr") // mislukte contracten tracken we nog niet
+    {
+        var sql = "SELECT fac_tracking_refkey,"
+                + "       fac_srtnotificatie_xmlnode,"
+                + "       fac_srtnotificatie_code,"
+                + "       MIN (fac_tracking_datum) firstdatum,"
+                + "       MAX (fac_tracking_datum) faildatum,"
+                + "       COUNT (*) failcount"
+                + "  FROM fac_tracking ft, fac_srtnotificatie fs"
+                + " WHERE     ft.fac_srtnotificatie_key = fs.fac_srtnotificatie_key"
+                + "       AND ft.fac_tracking_refkey = " + OpdrKey
+                + "       AND fac_srtnotificatie_code = " + (XMLnode == "opdracht" ? "'ORDSNX'" : "'BES2SX'")
+                + "  GROUP BY fac_tracking_refkey, fac_srtnotificatie_xmlnode, fac_srtnotificatie_code"
+        var oRs = Oracle.Execute(sql);
+        if (!oRs.Eof)
+        {
+            var failcount = oRs("failcount").Value;
+            var faildatum = new Date(oRs("faildatum").Value);
+            var firstdatum = new Date(oRs("firstdatum").Value);
+            var backofminutes = Math.min(120, failcount * 10); // Interval tussen pogingen steeds 10 minuten langer, max 2 uur
+            var nextdatum = new Date(faildatum);
+            nextdatum.setMinutes(nextdatum.getMinutes() + backofminutes);
+            if (nextdatum > new Date())
+            {
+                Log2File(1, "Failed " + failcount + " times between " + toDateTimeString(firstdatum) + " and " + toDateTimeString(faildatum) + ", delaying until " + toDateTimeString(nextdatum));
+                Log2File(1, "Failed {0} times between {1} and {2}, delaying until {3}".format(failcount, toDateTimeString(firstdatum), toDateTimeString(faildatum), toDateTimeString(nextdatum)));
+                return false;
+            }
+        }
+        oRs.Close();
+    }
 
     var sqlB = "SELECT prs_bedrijfadres_url, "
              + "       prs_bedrijfadres_encoding, "