You will soon notice (if you haven't already) that your list admin passwords on mail.python.org are broken. This happened due to an upgrade of the version of Python running on that system. The old list passwords can't be recovered, so they have to be reset.
List administrators can contact me to get this done. If you know the old password, send it to me and I'll reset the list to it. Otherwise, let me know and I'll generate a new password for you.
Sorry for the inconvenience, -Barry