[Dovecot] Expire issue

[Emmanuel Gonzalez]

Hello guys,
I'm trying to configure de expire plug in, all the configuration seems 
to be right but when I launch

# /opt/dovecot/sbin/dovecot --exec-mail ext 
/opt/dovecot/libexec/dovecot/expire-tool --test
Error: userdb(user at mydomain.it) didn't return uid
Info: User lookup failed: user at mydomain.it

even if I see in the logs that the authentication process worked fine 
(ldap):

dovecot: 2009-10-16 15:33:03 Info: auth(default): master in: USER    
1       user at mydomain.it  service=expire
dovecot: 2009-10-16 15:33:03 Info: auth(default): 
ldap(user at mydomain.it): user search: base=dc=mydomain,dc=it 
scope=subtree 
filter=(&(objectClass=inetOrgPerson)(mail=user at mydomain.it)) 
fields=mailMessageStore,mailquota
dovecot: 2009-10-16 15:33:03 Info: auth(default): 
ldap(user at mydomain.it): result: 
mailMessageStore(home)=/var/vmail/0/0/0/4/0 
mailquota(quota_rule=*:backend)=104857600S
dovecot: 2009-10-16 15:33:03 Info: auth(default): master out: USER      
1       user at mydomain.it  home=/var/vmail/0/0/0/4/0       
quota_rule=*:backend=104857600S

here my conf:

# OS: SunOS 5.9 
sun4v                                                                                                           

log_path: 
/var/log/dovecot.log                                                                                                  

info_log_path: 
/var/log/dovecot-info.log                                                                                        

log_timestamp: %Y-%m-%d 
%H:%M:%S                                                                                                

protocols: imap 
pop3                                                                                                            

listen(default): 
*:143                                                                                                          

listen(imap): 
*:143                                                                                                             

listen(pop3): 
*:10100                                                                                                           

ssl_disable: 
yes                                                                                                                

ssl_cert_file: 
/opt/csw/etc/dovecot.pem                                                                                         

ssl_key_file: 
/opt/csw/etc/dovecot.pem                                                                                          

disable_plaintext_auth: 
no                                                                                                      

login_dir: 
/opt/dovecot/var/run/dovecot/login                                                                                   

login_executable(default): 
/opt/dovecot/libexec/dovecot/imap-login                                                              

login_executable(imap): 
/opt/dovecot/libexec/dovecot/imap-login                                                                 

login_executable(pop3): 
/opt/dovecot/libexec/dovecot/pop3-login                                                                 

first_valid_uid: 
1                                                                                                              

first_valid_gid: 
12                                                                                                             

mail_privileged_group: 
daemon                                                                                                   

mail_uid: 
1                                                                                                                     

mail_gid: 
12                                                                                                                    

mail_location: 
maildir:%h                                                                                                       

mail_debug: 
yes                                                                                                                 

mail_executable(default): 
/opt/dovecot/libexec/dovecot/imap                                                                     

mail_executable(imap): 
/opt/dovecot/libexec/dovecot/imap                                                                        

mail_executable(pop3): 
/opt/dovecot/libexec/dovecot/pop3                                                                        

mail_plugins(default): quota imap_quota 
expire                                                                                  

mail_plugins(imap): quota imap_quota 
expire                                                                                     

mail_plugins(pop3): quota 
expire                                                                                                

mail_plugin_dir(default): /opt/dovecot/lib/dovecot/imap
mail_plugin_dir(imap): /opt/dovecot/lib/dovecot/imap
mail_plugin_dir(pop3): /opt/dovecot/lib/dovecot/pop3
pop3_uidl_format(default): %08Xu%08Xv
pop3_uidl_format(imap): %08Xu%08Xv
pop3_uidl_format(pop3): UID%u-%v
pop3_logout_format(default): top=%t/%p, retr=%r/%b, del=%d/%m, size=%s
pop3_logout_format(imap): top=%t/%p, retr=%r/%b, del=%d/%m, size=%s
pop3_logout_format(pop3): top=%t/%p, retr=%r/%b, del=%d/%m, size=%s, 
bytes=%i/%o
auth default:
  master_user_separator: *
  verbose: yes
  debug: yes
  debug_passwords: yes
  passdb:
    driver: passwd-file
    args: /opt/dovecot/etc/passwd.masterusers
    master: yes
  passdb:
    driver: ldap
    args: /opt/dovecot/etc/dovecot-ldap.conf
  userdb:
    driver: ldap
    args: /opt/dovecot/etc/dovecot-ldap-userdb.conf
  socket:
    type: listen
    master:
      path: /opt/dovecot/var/run/dovecot/auth-master
      mode: 384
      user: dovecot
      group: dovecot
plugin:
  quota: maildir
  expire: Trash 1 Trash/* 1 Spam 30
  expire_dict: proxy::expire
dict:
  expire: db:/opt/dovecot/var/lib/dovecot/expire.db

and ldap one:

# cat /opt/dovecot/etc/dovecot-ldap.conf |grep -v "#"|grep -v ^$
hosts = localhost
sasl_bind = no
auth_bind = yes
ldap_version = 3
base = dc=mydomain,dc=it
scope = subtree
user_attrs = mailMessageStore=home,mailquota=quota_rule=*:backend
user_filter = (&(objectClass=inetOrgPerson)(mail=%u))
pass_attrs = mail=user,userPassword=password,mailMessageStore=userdb_home
pass_filter = (&(objectClass=inetOrgPerson)(mail=%u))


I also tried to set user_attrs = 
*uid=uid,*mailMessageStore=home,mailquota=quota_rule=*:backend but i 
didn't solve the problem.
Any ideas?

thanx in advance!
-- 

Emmanuel Gonzalez