[Dovecot] Per-user quotas aren't working

[Guillaume CHARREYRON]

Hello

I tried to get per-user quotas working. The global quota is working well, but I can't get the one work on my test user:
dovecot -n
# 1.1.20: /etc/dovecot.conf
# OS: Linux 2.6.18-164.el5 i686 Red Hat Enterprise Linux Server release 5.4 (Tikanga) 
log_path: /var/log/dovecot.log
info_log_path: /var/log/dovecot.info.log
protocols: pop3
login_dir: /var/run/dovecot/login
login_executable: /usr/libexec/dovecot/pop3-login
login_greeting: test-POP3 READY
mail_location: maildir:~/Maildir
mail_executable: /usr/libexec/dovecot/pop3
mail_plugins: quota
mail_plugin_dir: /usr/lib/dovecot/pop3
pop3_client_workarounds: outlook-no-nuls oe-ns-eoh
lda:
  postmaster_address: grog at test.mymail.srv
  mail_plugins: quota
auth default:
  verbose: yes
  debug: yes
  debug_passwords: yes
  passdb:
    driver: passwd-file
    args: /etc/password.pop3
  userdb:
    driver: passwd-file
    args: /etc/password.pop3
plugin:
  quota: maildir:User quota
  quota_rule: *:storage=10M
  quota_rule2: Trash:storage=1M

with users line in my password.pop3 like this:
test-oper:{plain}test-oper:501:501::/home/test-oper::userdb_quota_rule=*:bytes=2
0M allow_nets=192.168.4.0/24

I know that this file is well understood since the allow_nets works well.
But I don't know why, the specific user quota rule isn't taken.
I also use the Dovecot deliver process.

Here is the info log:
dovecot: Jul 02 12:55:32 Info: auth(default): passwd-file(test-oper,192.168.4.239): lookup: user=test-oper file=/etc/password.pop3
dovecot: Jul 02 12:55:32 Info: auth(default): auth(test-oper,192.168.4.239): allow_nets: Matching for network 192.168.4.0/24
dovecot: Jul 02 12:55:32 Info: auth(default): client out: OK    1       user=test-oper
dovecot: Jul 02 12:55:32 Info: auth(default): master in: REQUEST        1      4521     1
dovecot: Jul 02 12:55:32 Info: auth(default): passwd-file(test-oper,192.168.4.239): lookup: user=test-oper file=/etc/password.pop3
dovecot: Jul 02 12:55:32 Info: auth(default): master out: USER  1       test-oper       uid=501 gid=501 home=/home/test-oper    quota_rule=*:bytes=20M
dovecot: Jul 02 12:55:32 Info: pop3-login: Login: user=<test-oper>, method=PLAIN, rip=192.168.4.239, lip=192.168.4.239, secured
deliver(test-oper): Jul 02 12:55:47 Info: msgid=<11c5.0003.0000 at test.mymail.srv>: save failed to INBOX: Quota exceeded (mailbox for user is full)
deliver(test-oper): Jul 02 12:55:47 Info: msgid=<11c5.0003.0000 at test.mymail.srv>: rejected: Quota exceeded (mailbox for user is full)
deliver(grog): Jul 02 12:55:47 Info: msgid=<dovecot-1278068147-645784-0 at test.mymail.srv>: saved mail to INBOX
dovecot: Jul 02 12:56:13 Info: POP3(test-oper): Disconnected: Logged out top=0/0, retr=0/0, del=0/15, size=13816325

The corresponding maildirsize still show the global quota, and not the "test-oper" one:
more /home/test-oper/Maildir/maildirsize 
10485760S
13643547 15

I also tried to delete it, restart dovecot service, the result is the same.

Do you have any idea?

Guillaume