[HandleProcessCorruptedStateExceptions]
        private void ServerEvClientSubmitSm(object sender, SmppServerClient client, SubmitSm data)
        {
            try
            {
                byte[] payload = data.Optional[OptionalTags.MessagePayload];

                if (data.RegisteredDelivery != (byte)(SMSCDeliveryReceipt.NotRequested))
                {
                    var deliver = new DeliverSm
                                      {
                                          Receipt = new Receipt
                                                        {
                                                            Delivered = 1,
                                                            DoneDate = DateTime.Now,
                                                            MessageId = data.Response.MessageId,
                                                            State = MessageState.Delivered
                                                        },
                                          Sequence = data.Sequence,
                                          Command = CommandSet.DeliverSm,
                                          SourceAddrTon = data.SrcTon,
                                          SourceAddrNpi = data.SrcNpi,
                                          SourceAddr = data.DestAddr,
                                          DestAddrTon = data.DestTon,
                                          DestAddrNpi = data.DestNpi,
                                          DestAddr = data.SrcAddr,
                                          ProtocolId = data.ProtocolId,
                                          PriorityFlag = data.PriorityFlag,
                                          RegisteredDelivery = (byte)SMSCDeliveryReceipt.NotRequested,
                                          DataCoding = data.DataCoding,
                                          EsmClass = (byte)MessageTypes.SMSCDeliveryReceipt
                                      };

                    client.DeliverAsync(deliver);
                }

                var userId = GetClientDbId(client.SystemID);

                if (payload != null)
                {
                    string text = client.GetMessageText(payload, data.DataCoding);
                    Log.Info(string.Format("UserId: {0}, Client {1}:{2} Received message Src:{3}, Dst:{4}, Text: {5}",
                        userId, client.RemoteIP, client.RemotePort, data.DestAddr, data.SrcAddr, text));

                    UpdateDataInDb(userId, text, data);
                }
                else
                {
                    Log.Info(string.Format("UserId: {0}, Client {1}:{2} Received message Src:{3}, Dst:{4}, Text: {5}",
                                           userId, client.RemoteIP, client.RemotePort, data.DestAddr, data.SrcAddr,
                                           data.ShortMessage));
                    UpdateDataInDb(userId, data.ShortMessage, data);
                }
            }
            catch (Exception exp)
            {
                Log.ErrorException(exp.Message, exp);
            }
        }