Roland Krause wrote:

I want to switch mailman from one server to another. Is there an easy way to do so? Have I only to change names in mm_cfg.py or Defaults.py or have I to reinstall the whole thing?

It's nearly as easy to reinstall.

When you move lists, consider using bin/move_list from 2.0+; unless you put things in the same directory, there are things in config.db that realize their own locations permanently.