Организация рассылки большому количеству контактов

[LisP]

Добрый день!

Столкнулся с непонятной проблемой, необходимо произвести рассылку по шаблону на 7000 контактов.

Вот этот код, взятый из SDK вполне рабочий и справляется с небольшими рассылками

 SendBulkMailRequest bulkMailRequest = new SendBulkMailRequest();

            // Create a query expression for the bulk operation to use to retrieve 
            // the contacts in our e-mail list.
            ConditionExpression condition = new ConditionExpression();
            condition.AttributeName = "contactid";
            condition.Operator = ConditionOperator.In;
            condition.Values = contactIds;

            FilterExpression filterExpression = new FilterExpression();
            filterExpression.Conditions = new ConditionExpression[] { condition };

            ColumnSet returnColumns = new ColumnSet();
            returnColumns.Attributes = new string[] { "contactid" };

            QueryExpression queryRequest = new QueryExpression();
            queryRequest.ColumnSet = returnColumns;
            queryRequest.EntityName = EntityName.contact.ToString();
            queryRequest.Criteria = filterExpression;

            // Attach the contact query to the bulk e-mail request.
            bulkMailRequest.Query = queryRequest;

            // Get a system user to use as the sender.
            bulkMailRequest.Sender = GetEmailSenderMoniker(service);

            // Set the RegardingId to the e-mail sender.
            bulkMailRequest.RegardingId = bulkMailRequest.Sender.Id;
            bulkMailRequest.RegardingType = EntityName.systemuser.ToString();

            // Use a built-in e-mail template.
            // NOTE: The e-mail template's 'template type' must match the type of customers
            // in the e-mail list. Our list contains contacts, so our template must be for contacts.
            bulkMailRequest.TemplateId = new Guid("07B94C1D-C85F-492F-B120-F0A743C540E6");

            // Create a tracking ID for the bulk operation to monitor its progress.
            RequestIdOptionalParameter trackingId = new RequestIdOptionalParameter();
            trackingId.Value = Guid.NewGuid();
            
            // Attach the tracking ID to the bulk e-mail request.
            bulkMailRequest.OptionalParameters = new OptionalParameter[] { trackingId };

            // Execute the async bulk e-mail request.
            service.Execute(bulkMailRequest);
            
            // Now that we have executed the bulk operation, we have to retrieve it using our tracking ID.
            ColumnSet asyncColumns = new ColumnSet();
            asyncColumns.Attributes = new string[] { "requestid", "statecode" };

            QueryByAttribute bulkQuery = new QueryByAttribute();
            bulkQuery.ColumnSet = asyncColumns;
            bulkQuery.EntityName = EntityName.asyncoperation.ToString();
            bulkQuery.Attributes = new string[] { "requestid" };
            bulkQuery.Values = new object[1];
            bulkQuery.Values[0] = trackingId.Value;

            // Retrieve the bulk e-mail async operation.
            BusinessEntityCollection aResponse = service.RetrieveMultiple(bulkQuery);

            // Monitor the async operation through polling.
            const int ARBITRARY_MAX_POLLING_TIME = 60;
            int secondsTicker = ARBITRARY_MAX_POLLING_TIME;

            asyncoperation createdBulkMailOperation = null;
            
            while (secondsTicker > 0)
            {
               // Make sure that the async operation was retrieved.
               if (aResponse.BusinessEntities.Length > 0)
               {
                  // Grab the one bulk operation that was created.
                  createdBulkMailOperation = (asyncoperation)aResponse.BusinessEntities[0];

                  // Check the operation's state.
                  if (createdBulkMailOperation.statecode.Value != AsyncOperationState.Completed)
                  {
                     // The operation has not yet completed.  Wait a second for the status to change.
                     System.Threading.Thread.Sleep(1000);
                     secondsTicker--;

                     // Retrieve a fresh version the bulk delete operation.
                     aResponse = service.RetrieveMultiple(bulkQuery);
                  }
                  else
                  {
                     // Stop polling because the operation's state is now completed.
                     secondsTicker = 0;
                  }
               }
               else
               {
                  // Wait a second for the async operation to become active.
                  System.Threading.Thread.Sleep(1000);
                  secondsTicker--;

                  // Retrieve the entity again.
                  aResponse = service.RetrieveMultiple(bulkQuery);
               }
            }
            
            // When the bulk e-mail operation has finished, all sent e-mail messages will have a status of "Pending Send" and 
            // will be picked up by your e-mail router. Or, you can then use BackgroundSendEmail to download
            // all the e-mail messages that were created by using the SendBulkEmail message. See the BackgroundSendEmail sample for an example.

            #region check success
            
            // Validate async operation succeeded.
            if (createdBulkMailOperation.statecode.Value == AsyncOperationState.Completed)
            {
               success = true;
            }

При отправить на 7000 контактов, не появляется никаких ошибок в логах (уровень отладки в конфиге EmailRouterа на 3 менял, ошибок нет), но и почта не уходит и даже соответствующие активности не создаются для контактов. Даже не знаю в чем проблема и как её решать. В хвосте функции объект createdBulkMailOperation.statecode приобретает значение Suspensed.
Пробовал увеличивать значение ARBITRARY_MAX_POLLING_TIME до 6000, не помогло, функция отрабатывает больше времени, но писем и активностей не появляется.