[Mailman-Users] Mailman 3: Uncaught runner exception: 'ascii' codec can't encode character

[casi.pw]

Hello,

I'm trying to run mailman 3 in production on a shared server. Mailman
gets its mail from exim via LMTP. First it appeared to work fine, but I
got a problem:

According to my mailman.log, mails with special characters (in this case
"€", but also Germanic umlauts as "ö") in their bodies are shunted and
not delivered. (Mails with special characters only in their subjects but
not in their bodies are not affected by this error.)

----

May 29 01:17:26 2015 (2332) ACCEPT: <5567XXXX.5040XXX at XXXX.net>
May 29 01:17:27 2015 (2317) Uncaught runner exception: 'ascii' codec
can't encode character '\u20ac' in position 1: ordinal not in range(128)
May 29 01:17:27 2015 (2317) Traceback (most recent call last):
  File
"/home/casi/mailman3/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/core/runner.py",
line 165, in _one_iteration
    self._process_one_file(msg, msgdata)
  File
"/home/casi/mailman3/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/core/runner.py",
line 258, in _process_one_file
    keepqueued = self._dispose(mlist, msg, msgdata)
  File
"/home/casi/mailman3/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/runners/pipeline.py",
line 41, in _dispose
    process(mlist, msg, msgdata, pipeline)
  File
"/home/casi/mailman3/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/core/pipelines.py",
line 62, in process
    handler.process(mlist, msg, msgdata)
  File
"/home/casi/mailman3/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/handlers/to_digest.py",
line 54, in process
    mbox.add(msg)
  File "/package/host/localhost/python-3.4/lib/python3.4/mailbox.py",
line 601, in add
    self._toc[self._next_key] = self._append_message(message)
  File "/package/host/localhost/python-3.4/lib/python3.4/mailbox.py",
line 752, in _append_message
    offsets = self._install_message(message)
  File "/package/host/localhost/python-3.4/lib/python3.4/mailbox.py",
line 824, in _install_message
    self._dump_message(message, self._file, self._mangle_from_)
  File "/package/host/localhost/python-3.4/lib/python3.4/mailbox.py",
line 214, in _dump_message
    gen.flatten(message)
  File
"/package/host/localhost/python-3.4/lib/python3.4/email/generator.py",
line 112, in flatten
    self._write(msg)
  File
"/package/host/localhost/python-3.4/lib/python3.4/email/generator.py",
line 178, in _write
    self._dispatch(msg)
  File
"/package/host/localhost/python-3.4/lib/python3.4/email/generator.py",
line 211, in _dispatch
    meth(msg)
  File
"/package/host/localhost/python-3.4/lib/python3.4/email/generator.py",
line 433, in _handle_text
    super(BytesGenerator,self)._handle_text(msg)
  File
"/package/host/localhost/python-3.4/lib/python3.4/email/generator.py",
line 246, in _handle_text
    self._write_lines(payload)
  File
"/package/host/localhost/python-3.4/lib/python3.4/email/generator.py",
line 158, in _write_lines
    self.write(laststripped)
  File
"/package/host/localhost/python-3.4/lib/python3.4/email/generator.py",
line 407, in write
    self._fp.write(s.encode('ascii', 'surrogateescape'))
UnicodeEncodeError: 'ascii' codec can't encode character '\u20ac' in
position 1: ordinal not in range(128)
May 29 01:17:27 2015 (2317) SHUNTING:
1432855047.4798193+1fe1f94488b77c19d5521cb8cbcda48f52828752

----

Deleting the list's digest.mmdf file had no effect. "mailman unshunt"
created a new, empty digest.mmdf file, but the mails where shunted again.

Is there any solution for this issue?

Best regards,
casi