diff --git a/aprsd/threads/__init__.py b/aprsd/threads/__init__.py
index bf8cb23..9220a65 100644
--- a/aprsd/threads/__init__.py
+++ b/aprsd/threads/__init__.py
@@ -4,7 +4,7 @@ import queue
 # aprsd.threads
 from .aprsd import APRSDThread, APRSDThreadList  # noqa: F401
 from .keep_alive import KeepAliveThread  # noqa: F401
-from .rx import APRSDRXThread  # noqa: F401
+from .rx import APRSDRXThread, APRSDDupeRXThread, APRSDProcessPacketThread  # noqa: F401
 
 
 packet_queue = queue.Queue(maxsize=20)
diff --git a/aprsd/threads/rx.py b/aprsd/threads/rx.py
index 98e5054..7c8e422 100644
--- a/aprsd/threads/rx.py
+++ b/aprsd/threads/rx.py
@@ -58,12 +58,13 @@ class APRSDRXThread(APRSDThread):
         pass
 
 
-class APRSDPluginRXThread(APRSDRXThread):
+class APRSDDupeRXThread(APRSDRXThread):
     """Process received packets.
 
     This is the main APRSD Server command thread that
-    receives packets from APRIS and then sends them for
-    processing in the PluginProcessPacketThread.
+    receives packets and makes sure the packet
+    hasn't been seen previously before sending it on
+    to be processed.
     """
 
     def process_packet(self, *args, **kwargs):
@@ -118,6 +119,13 @@ class APRSDPluginRXThread(APRSDRXThread):
                 self.packet_queue.put(packet)
 
 
+class APRSDPluginRXThread(APRSDDupeRXThread):
+    """"Process received packets.
+
+    For backwards compatibility, we keep the APRSDPluginRXThread.
+    """
+
+
 class APRSDProcessPacketThread(APRSDThread):
     """Base class for processing received packets.
 
diff --git a/aprsd/threads/tx.py b/aprsd/threads/tx.py
index 708d263..84dd7dd 100644
--- a/aprsd/threads/tx.py
+++ b/aprsd/threads/tx.py
@@ -37,6 +37,8 @@ msg_throttle_decorator = decorator.ThrottleDecorator(throttle=msg_t)
 ack_throttle_decorator = decorator.ThrottleDecorator(throttle=ack_t)
 
 
+
+@msg_throttle_decorator.sleep_and_retry
 def send(packet: core.Packet, direct=False, aprs_client=None):
     """Send a packet either in a thread or directly to the client."""
     # prepare the packet for sending.