[Mailman-Users] Mailman with Exim4: owner cannot post

[Oliver König]

I installed configured Mailman v2.1.5 with Exim4 v4.50 on a remote server 
www.windfinder.com (see http://www.exim.org/howto/mailman21.html).

I created a mailing list called 'testlist' and tried to post to the list by 
sending a message to testlist at windfinder.com from the list owner's e_mail 
account on my local mail client. 

I I send to testlist at server.windfinder.com get this reply:
--------------------------------------------------------------------------------
This message was created automatically by mail delivery software.
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:
  testlist at server.windfinder.com
    remote host address is the local host: retry timeout exceeded
---
/var/log/mail.log:
-----------------------
Nov  1 12:24:24 server spamd[1950]: checking message 
<200511011223.54292.oliver at windfinder.com> for nobody:65534.
Nov  1 12:24:24 server spamd[1950]: clean message (0.0/5.0) for nobody:65534 
in 0.0 seconds, 599 bytes.

If I send to testlist at windfinder.com the message is always rejected.

I think I the problem has to do with setting the host and domain names right 
in:
mm_cfg.py:
-----------------
DEFAULT_EMAIL_HOST = 'server.windfinder.com'

/etc/exim4/exim4.conf.template:
----------------------------------------------
# Domains that your lists are in - colon separated list
# you may wish to add these into local_domains as well
domainlist 
mm_domains=windfinder.com:server.windfinder.com:www.windfinder.com:list.windfinder.com
# I do not know which values is right, so I entered every value, separated by 
colons.

General options for [testlist] (var/lib/mailman/lists/testlis/config.pck:
-------------------------------------------------------------------------------------------------
host_name (general): Host name this list prefers for email: 
server.windfinder.com

I checked /etc/hosts:
------------------------------
127.0.0.1       server  server.windfinder.com www.windfinder.com localhost


How I do I get this right?