setup-kolab (setup_mta.py) issue

Hello,

Below is my most current issue with the setup procedure on debian wheezy ... 
'/files/etc/postfix/main.cf/' is currently not present n the system, but 
files stored in it are utilized in 'setup_mta.py' ... where is this 
directory supposed to be coming from?

Thanks - as always.

Sincerely, Joh

]: Setting logfile to '/var/log/kolab/pykolab.log' (from CLI, not checked)
Traceback (most recent call last):
  File "/usr/sbin/setup-kolab", line 42, in <module>
    setup.run()
  File "/usr/lib/python2.7/dist-packages/pykolab/setup/__init__.py", line 
42, in run
    components.execute('_'.join(to_execute))
  File "/usr/lib/python2.7/dist-packages/pykolab/setup/components.py", line 
170, in execute
    execute(component)
  File "/usr/lib/python2.7/dist-packages/pykolab/setup/components.py", line 
202, in execute
    components[component_name]['function'](conf.cli_args, kw)
  File "/usr/lib/python2.7/dist-packages/pykolab/setup/setup_mta.py", line 
221, in execute
    insert_path = insert_paths[(len(insert_paths)-1)]