This is a very strange traceback. I can't imagine how it's occurring frankly, since pickle *should* have protections against recursively linked objects, and there shouldn't be any such objects in the metadata (a dictionary with simple key/value pairs) or in the Message object. Does this still occur with the beta1 or the latest bzr trunk? If so, please re-open this bug and attach the offending message, and I'll try to reproduce it locally. ** Changed in: mailman Status: Triaged => Incomplete -- You received this bug notification because you are a member of Mailman Coders, which is subscribed to GNU Mailman. https://bugs.launchpad.net/bugs/881316 Title: RuntimeError: maximum recursion depth exceeded while pickling an object To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/881316/+subscriptions