[Dovecot] postfix+dovecot delivering to wrong (/var/mail/%u) place

[Tom Lobato]

(Dovecot 1.0.rc15)

Hello I'm tring to configure postfix+dovecot on debian etch.
In dovecot I use passdb pam and userdb passwd-file. I can connect pop3 
clients and reveice mails
and connect smtp clients and send mails, but it is delivered to 
/var/mail/%u instead the configured
mailboxes in /var/local/dovecot/%u.
I`ve configured postfix as say http://wiki.dovecot.org/LDA/Postfix.

/etc/postfix/main.cf:
-----------------------------------
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no
append_dot_mydomain = no
myhostname = coan
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination = coan.com.br
myorigin = /etc/mailname
relayhost =
mynetworks = 121.120.0.0/16
mailbox_size_limit = 0
inet_interfaces = all
smtpd_recipient_restrictions = reject_unauth_destination
virtual_transport = dovecot
dovecot_destination_recipient_limit = 1
-----------------------------------
belong master.cf.


Below the syslog when I send mail via smtp...

/var/log/syslog:
--------------------------------
 postfix/smtpd[16656]: connect from 
201-95-99-135.dsl.telesp.net.br[201.95.99.135]
 postfix/smtpd[16656]: C76F948E3D7: 
client=201-95-99-135.dsl.telesp.net.br[201.95.99.135]
 postfix/cleanup[16660]: C76F948E3D7: 
message-id=<1181769218.7844.6.camel at mobile>
 postfix/qmgr[16653]: C76F948E3D7: from=<tom at coan.com.br>, size=457, 
nrcpt=1 (queue active)
 postfix/local[16661]: C76F948E3D7: to=<tom at coan.com.br>, relay=local, 
delay=0.52, delays=0.45/0.01/0/0.07, dsn=2.0.0, status=sent (delivered 
to mailbox)
 postfix/qmgr[16653]: C76F948E3D7: removed
 postfix/smtpd[16656]: disconnect from 
201-95-99-135.dsl.telesp.net.br[201.95.99.135]
-------------------------------

If I change 'virtual_transport = dovecot' to 'local_transport = 
dovecot', syslog output changes relay-local to relay=dovecot, but 
bounces the mail saying 'passwd-file(tom at coan.com.br): unknown user'. 
However I'm sure that the user is in the passwd-file and dovecot has 
permissions to read it.

Can you give some hints about what can be happening?

Dovecot conf:
-----------------------
# /etc/dovecot/dovecot.conf
log_timestamp: %Y-%m-%d %H:%M:%S
protocols: pop3
disable_plaintext_auth: no
login_dir: /var/run/dovecot/login
login_executable: /usr/lib/dovecot/pop3-login
mail_extra_groups: mail mailboxes
mail_location: maildir:/var/local/dovecot/%u
mail_executable: /usr/lib/dovecot/pop3
mail_plugin_dir: /usr/lib/dovecot/modules/pop3
pop3_uidl_format: %v.%u
auth default:
  verbose: yes
  debug: yes
  debug_passwords: yes
  passdb:
    driver: pam
  userdb:
    driver: passwd-file
    args: /etc/mailsystem/userdb
  socket:
    type: listen
    client:
    master:
      path: /var/run/dovecot/auth-master
      mode: 438
-----------------------


Thank you
Tom Lobato