[Dovecot] Dovecot creating aditional folders?

[Pablo]

Hi guys.

My conf:

# 1.2.9: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-23-server x86_64 Ubuntu 10.04.1 LTS reiserfs
log_timestamp: %Y-%m-%d %H:%M:%S
protocols: imap imaps pop3 pop3s
ssl_cert_file: /etc/ssl/mail/dovecot.crt
ssl_key_file: /etc/ssl/mail/dovecot.key
disable_plaintext_auth: no
login_dir: /var/run/dovecot/login
login_executable(default): /usr/lib/dovecot/imap-login
login_executable(imap): /usr/lib/dovecot/imap-login
login_executable(pop3): /usr/lib/dovecot/pop3-login
mail_location: maildir:/home/vmail/%u/
mail_debug: yes
mbox_write_locks: fcntl dotlock
mail_executable(default): /usr/lib/dovecot/imap
mail_executable(imap): /usr/lib/dovecot/imap
mail_executable(pop3): /usr/lib/dovecot/pop3
mail_plugin_dir(default): /usr/lib/dovecot/modules/imap
mail_plugin_dir(imap): /usr/lib/dovecot/modules/imap
mail_plugin_dir(pop3): /usr/lib/dovecot/modules/pop3
auth default:
  mechanisms: plain login
  verbose: yes
  debug: yes
  debug_passwords: yes
  passdb:
    driver: sql
    args: /etc/dovecot/dovecot-sql.conf
  userdb:
    driver: sql
    args: /etc/dovecot/dovecot-sql.conf
  socket:
    type: listen
    client:
      path: /var/spool/postfix/private/auth
      mode: 432
      user: postfix
      group: postfix
    master:
      path: /var/run/dovecot/auth-master
      mode: 384
      user: vmail
      group: vmail
-------------------------------------

My problem is that dovecot is creating aditional folders:

#ls -l /home/vmail

drwx------ 6 vmail vmail 184 2010-09-01 01:31 escuelasuperiordecoaching.com
drwx------ 8 vmail vmail 392 2010-09-01 10:58
pablo.rodriguez at escuelasuperiordecoaching.com

# ls -l escuelasuperiordecoaching.com/
drwx------ 5 vmail vmail 120 2010-08-30 14:35 pablo.rodriguez

I'm receiving mail in
/home/vmail/escuelasuperiordecoaching.com/pablo.rodriguez/new without
problem, but why is dovecot creating aditional folders?

My log:

Sep  1 10:58:30 socrates dovecot: auth(default): master in:
REQUEST^I162^I4003^I1
Sep  1 10:58:30 socrates dovecot: auth-worker(default):
sql(pablo.rodriguez at escuelasuperiordecoaching.com,127.0.0.1): SELECT
maildir, 1001 AS uid, 1001 AS gid FROM mailbox WHERE username =
'pablo.rodriguez at escuelasuperiordecoaching.com'
Sep  1 10:58:30 socrates dovecot: auth(default): master out:
USER^I162^Ipablo.rodriguez at escuelasuperiordecoaching.com^Imaildir=escuelasuperiordecoaching.com/pablo.rodriguez/^Iuid=1001^Igid=1001
Sep  1 10:58:30 socrates dovecot: imap-login: Login:
user=<pablo.rodriguez at escuelasuperiordecoaching.com>, method=PLAIN,
rip=127.0.0.1, lip=127.0.0.1, secured
Sep  1 10:58:30 socrates dovecot:
IMAP(pablo.rodriguez at escuelasuperiordecoaching.com): Effective
uid=1001, gid=1001, home=(none)
Sep  1 10:58:30 socrates dovecot:
IMAP(pablo.rodriguez at escuelasuperiordecoaching.com): maildir:
data=/home/vmail/pablo.rodriguez at escuelasuperiordecoaching.com/
Sep  1 10:58:30 socrates dovecot:
IMAP(pablo.rodriguez at escuelasuperiordecoaching.com): maildir++:
root=/home/vmail/pablo.rodriguez at escuelasuperiordecoaching.com,
index=, control=,
inbox=/home/vmail/pablo.rodriguez at escuelasuperiordecoaching.com
Sep  1 10:58:30 socrates dovecot:
IMAP(pablo.rodriguez at escuelasuperiordecoaching.com): Namespace : Using
permissions from
/home/vmail/pablo.rodriguez at escuelasuperiordecoaching.com: mode=0700
gid=-1
Sep  1 10:58:30 socrates dovecot:
IMAP(pablo.rodriguez at escuelasuperiordecoaching.com): Disconnected:
Logged out bytes=117/1383

I can see that Dovecot is creating when...I login?

What's the problem? I can't understand...

Thanks in advance.