Traceback (most recent call last):
  File "/home/cce/mailman/mailman/.tox/py34/bin/runner", line 9, in <module>
    load_entry_point('mailman==3.0.0b6', 'console_scripts', 'runner')()
  File "/home/cce/mailman/mailman/src/mailman/bin/runner.py", line 200, in main
    runner = make_runner(*args.runner, once=args.once)
  File "/home/cce/mailman/mailman/src/mailman/bin/runner.py", line 100, in make_runner
    return runner_class(name, slice)
  File "/home/cce/mailman/mailman/src/mailman/runners/lmtp.py", line 164, in __init__
    smtpd.SMTPServer.__init__(self, localaddr, remoteaddr=None)
  File "/usr/lib/python3.4/smtpd.py", line 589, in __init__
    self.bind(localaddr)
  File "/usr/lib/python3.4/asyncore.py", line 334, in bind
    return self.socket.bind(addr)
OSError: [Errno 98] Address already in use