[Dovecot] deliver doesn't find adress/inbox

[Martin Benkenstein]

I'm trying to make dovecot 1.2.15, deliver, openLDAP, exim and fetchmail 
work together on an Debian Squeeze (virtual) maschine. The connection 
between dovecot and LDAP seems to be working, I can logon from 
Thunderbird (IMAP) and my maildir is created automatically. So far so good.

But when I download the mails via fetchmail, it seems that deliver 
cannot find the correct mailbox for the X-Envelope-To entry in the 
header. fetchmail downloads all mails for the domain from one account 
(config below) and hands them over to exim. I configured exim addording 
to the wiki entry (http://wiki.dovecot.org/LDA/Exim Virtual Users / 
Single UID).
The mail is sent back to the account which is fetched by fetchmail. 
There is a header entry X-Fetchmail-Warning: no recipient addresses 
matched declared local names. The fetchmail-log itself is worthless.

What am I doing wrong? At which does the system try to look up the 
mailaddress and fails?

Thank you in advance
Martin


Configuration details:

# dovecot -n
# 1.2.15: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-5-686 i686 Debian 6.0.1 ext3
log_path: /var/log/dovecot.log
log_timestamp: %Y-%m-%d %H:%M:%S
login_dir: /var/run/dovecot/login
login_executable: /usr/lib/dovecot/imap-login
mail_privileged_group: mail
mail_location: maildir:/var/mail/dovecot/%n@%d/maildir/
mbox_write_locks: fcntl dotlock
lda:
   postmaster_address: postfrau at pti857.dyndns.info
   hostname: pti857.dyndns.info
   log_path: /var/log/dovecot-deliver-errors.log
   info_log_path: /var/log/dovecot-deliver.log
   sendmail_path: /usr/sbin/sendmail
   auth_socket_path: /var/run/dovecot/auth-master
auth default:
   verbose: yes
   passdb:
     driver: ldap
     args: /etc/dovecot/dovecot-ldap.conf
   userdb:
     driver: static
     args: uid=1002 gid=1002 home=/var/mail/dovecot/%n@%d/home
   socket:
     type: listen
     master:
       path: /var/run/dovecot/auth-master
       mode: 384
       user: dovecotvmail


/etc/dovecot/dovecot-ldap.conf
###
hosts = localhost
dn = cn=admin,dc=tuced,dc=local
dnpass = toor
auth_bind = yes
ldap_version = 3
base = ou=users, dc=tuced, dc=local


  /etc/fetchmailrc
####
set daemon 300  # Pool every 5 minutes
set postmaster root
set no bouncemail
defaults:
timeout 300
antispam -1
batchlimit 100
set no syslog
set logfile "/var/log/fetchmail.log"
poll mail.domain.de proto pop3 localdomains some.domain.org:
         envelope "X-Envelope-To:"
         timeout 30
         user postman at some.domain.org
         password secret
         is *


/etc/exim4/conf.d/transport/30_exim4-config_dovecot_lda
###
dovecot_virtual_delivery:
   driver = pipe
   command = /usr/local/libexec/dovecot/deliver -d $local_part@$domain  
-f $sender_address -a $original_local_part@$original_domain
   message_prefix =
   message_suffix =
   delivery_date_add
   envelope_to_add
   return_path_add
   log_output
   user = dovecotvmail
   temp_errors = 64 : 69 : 70: 71 : 72 : 73 : 74 : 75 : 78