[Dovecot] mail delivery location wrong

[Firma Averlon]

Hi,
thanks for offering the oportunity to place a question here.

I am now already working since a week to get postfix and dovecot working 
on a ubuntu 11.04 server.
Hard task. First step was naturally to get familiar with the idea behind 
the archtitecture.

I have come very far, but the "last dirty mile" is probably the hardest.

My architecture:
Postfix
Dovecot
OpenLDAP
Thunderbird as client with pop3

I can meanwhile send e-mails and open my mailbox in thunderbird (not 
receiving mails so far).

The reason why not receiving e-Mails is simply: When sending the mails 
they are stored in a different directory as where dovecot will look for 
them !!!!

Error message from log:
Aug  8 14:09:01 server dovecot: deliver(vmail): maildir: 
data=/home/vmail//vmail/Maildir
Aug  8 14:09:01 server dovecot: deliver(vmail): maildir: 
data=/home/vmail//vmail/Maildir
Aug  8 14:09:01 server dovecot: deliver(vmail): maildir++: 
root=/home/vmail//vmail/Maildir, index=, control=, 
inbox=/home/vmail//vmail/Maildir
Aug  8 14:09:01 server dovecot: deliver(vmail): maildir++: 
root=/home/vmail//vmail/Maildir, index=, control=, 
inbox=/home/vmail//vmail/Maildir

What you immediatly see: "vmail//vmail"

Although, when authenticating, the result is:
Aug  8 14:06:30 server dovecot: auth(default): master out: 
USER#0113#011userxxx at av.loc#011gid=5000#011home=/home/userxxx#011uid=5000#011mail=/home/vmail/av.loc/userxxx/Maildir/

The following settings are in place:
main.cf of postfix:

virtual_mailbox_domains = /etc/postfix/vhosts
virtual_mailbox_base = /home/vmail
virtual_mailbox_maps = ldap:/etc/postfix/ldap-virtual.cf
virtual_minimum_uid = 1000
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
virtual_transport = dovecot
mailbox_command = /usr/lib/dovecot/deliver

beside others.

master.cf of postfix
dovecot   unix  -       n       n       -       -       pipe
   flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f 
${sender} -a ${recipient}

dovecot.conf
sendmail_path = /usr/sbin/sendmail
mail_location = maildir:/home/vmail/%d/%n/Maildir

beside others.

I guess, these are the ones influencing where to store the mail and pick 
it up.

A list of the related filesystem:
/home/vmail/
drwx-w--w- 4 vmail vmail 4096 2011-08-08 08:56 av.loc/
drwx------ 3 vmail vmail 4096 2011-08-08 09:42 vmail/

Wher you can see, the structure according "mail_location" parameter of 
dovecot.conf does show effect, but the mails are stored in 
/home/vmail//vmail.....".

The whole bunch of documentation I have read meanwhile makes my head 
circle around.
You could hopefully give me some help.
-- 


Mit freundlichen Grüßen / Kind Regards

Hr. Karl-Heinz Fischbach