Use of Postfix regexp tables as documented throws a configparser.NoOptionError exception.
The documentation for the use of Postfix regex tables as implemented by !263 (merged) says to add
configuration: /path/to/postfix-mailman.cfg
and create /path/to/postfix-mailman.cfg
containing
[postfix]
transport_file_type: regex
Current code does
self.postmap_command = mta_config.get('postfix', 'postmap_command')
even if transport_file_type is regex even though self.postmap_command is unused in that case. This results in a configparser.NoOptionError exception.