If it does appear that Mailman is somehow generating these multiple bounce-events entries, you might compare your BounceRunner.py to the 2.1.15 base at https://bazaar.launchpad.net/~mailman-coders/mailman/2.1/view/1357/Mailman/Queue/BounceRunner.py to see if there might be some corruption.
If it does appear that Mailman is somehow generating these multiple bounce-events entries, you might compare your BounceRunner.py to the 2.1.15 base at https:/ /bazaar. launchpad. net/~mailman- coders/ mailman/ 2.1/view/ 1357/Mailman/ Queue/BounceRun ner.py to see if there might be some corruption.