pqm-submit returns "Connection timed out" error and traceback

When I run pqm-submit, I get:
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15:19:39@...> bzr pqm-submit -m "..."
Checking that the public branch is up to date ...
bzr: ERROR: socket.error: (110, 'Connection timed out')

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 802, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 758, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 492, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/pqm/__init__.py", line 88, in run
    submit(b, message=message, dry_run=dry_run, public_location=public_location)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/pqm/pqm_submit.py", line 136, in submit
    smtp.connect(server)
  File "smtplib.py", line 310, in connect
    raise socket.error, msg
error: (110, 'Connection timed out')

bzr 0.92.0.candidate.1 on python 2.5.1.final.0 (linux2)
arguments: ['/usr/bin/bzr', 'pqm-submit', '-m', '...']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_NZ.UTF-8'
plugins:
  bzrtools /usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools [0.92.0]
  launchpad /usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad [unknown]
  multiparent /usr/lib/python2.5/site-packages/bzrlib/plugins/multiparent.pyc [unknown]
  pqm /usr/lib/python2.5/site-packages/bzrlib/plugins/pqm [unknown]

** Please send this report to <email address hidden>
   with a description of what you were doing when the
   error occurred.
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If this is a bug in pqm-submit, please fix it. :-) And if it is not a bug in pqm-submit, it shouldn't return a traceback.