[Mailman-Users] wrapper's error

[Jason]

I get an error messge when I reply to the confirmation email... could
someone that know's about this help me out.
Here is the email that I get as a reply to my confirmation.

This message was created automatically by mail delivery software (Exim).

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  mailinglist-request at domain.org
    Child process of list_request_transport transport returned 2 from
command:
    /home/mailman/mail/wrapper
-------- end error

What does the returned 2 from command mean? what do I have to fix to get
this working?

Thanks
j