[Mailman-Users] Problems on mailman3 installation via mailman-bundler

[Take]

I've been struggling for couple of days to get mailman3 up and running 
on my Debian Jessie -host. So far I'm in the situation that everything 
should (more or less) work, I can create lists and receive confirmation 
emails etc.

However, every post I send to the testing-list I created end up in 
shunting, from log file I get this:

Sep 29 00:59:34 2015 (21017) Traceback (most recent call last):
   File 
"/home/mailman/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/mailman/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/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/runners/incoming.py", 
line 63, in _dispose
     process(mlist, msg, msgdata, start_chain)
   File 
"/home/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/core/chains.py", 
line 86, in process
     link.function(mlist, msg, msgdata)
   File 
"/home/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/chains/hold.py", 
line 182, in _process
     autorespond_to_sender(mlist, msg.sender, language)):
   File 
"/home/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/chains/hold.py", 
line 83, in autorespond_to_sender
     address = user_manager.create_address(sender)
   File 
"/home/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/database/transaction.py", 
line 92, in wrapper
     return function(args[0], config.db.store, *args[1:], **kws)
   File 
"/home/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/model/usermanager.py", 
line 110, in create_address
     address = Address(email, display_name)
   File "<string>", line 4, in __init__
   File 
"/home/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/sqlalchemy/orm/state.py", 
line 306, in _initialize_instance
     manager.dispatch.init_failure(self, args, kwargs)
   File 
"/home/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/sqlalchemy/util/langhelpers.py", 
line 60, in __exit__
     compat.reraise(exc_type, exc_value, exc_tb)
   File 
"/home/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/sqlalchemy/util/compat.py", 
line 182, in reraise
     raise value
   File 
"/home/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/sqlalchemy/orm/state.py", 
line 303, in _initialize_instance
     return manager.original_init(*mixed[1:], **kwargs)
   File 
"/home/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/model/address.py", 
line 59, in __init__
     getUtility(IEmailValidator).validate(email)
   File 
"/home/mailman/mailman-bundler/venv-3.4/lib/python3.4/site-packages/mailman/email/validate.py", 
line 64, in validate
     raise InvalidEmailAddressError(email)
mailman.interfaces.address.InvalidEmailAddressError

So, apparently something is wrong with member addresses? Since I'm 
dealing with fresh installation there's only two of my own addresses, 
both valid (checked via bin/mailman members mylist at example.com)

Additionally, for some reason my debug.log is empty. I couldn't find any 
reference from documentation nor from sample configuration files on how 
to switch debugging on, is there documentation about mailman.cfg and 
options I can (or should) have there?

-- 
Take