[Dovecot] My dovecot does not store Thunderbird flags

[Julien Buratto]

Hi all,

my Dovecot 1.1.20 does not store flags (I mean, Thunderbird Labels
like ToDo, Important and so on..)
When logging in via telnet, I get:

. examine INBOX
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft NonJunk $MDNSent
Junk $Forwarded NotJunk receipt-handled $Label7 $label1 $label2
$label3 $label4 $label5 expired_2w expired_2m delete rimandata
forwarded)
* OK [PERMANENTFLAGS ()] Read-only mailbox.

As per Thunderbird mozillazine page about tags
(http://kb.mozillazine.org/Tags#IMAP) that's what the issue is.
PERMANENTFLAGS should allow /* while in my server it's empty.

Could someone point me how can I change this behaviour or some hints ?

Thank you
--
Julien Buratto

PS: In case someone asks for it
> dovecot -n
# 1.1.20: /usr/local/etc/dovecot.conf
# OS: Linux 2.6.9-67.0.4.EL i686 CentOS release 4.7 (Final)
log_path: /var/log/maillog
info_log_path: /var/log/maillog
protocols: imaps imap pop3 pop3s
disable_plaintext_auth: no
login_dir: /usr/local/var/run/dovecot/login
login_executable(default): /usr/local/libexec/dovecot/imap-login
login_executable(imap): /usr/local/libexec/dovecot/imap-login
login_executable(pop3): /usr/local/libexec/dovecot/pop3-login
mail_location: mbox:~/mail/:INBOX=mbox
mbox_lazy_writes: no
mail_executable(default): /usr/local/libexec/dovecot/imap
mail_executable(imap): /usr/local/libexec/dovecot/imap
mail_executable(pop3): /usr/local/libexec/dovecot/pop3
mail_plugin_dir(default): /usr/local/lib/dovecot/imap
mail_plugin_dir(imap): /usr/local/lib/dovecot/imap
mail_plugin_dir(pop3): /usr/local/lib/dovecot/pop3
pop3_no_flag_updates(default): no
pop3_no_flag_updates(imap): no
pop3_no_flag_updates(pop3): yes
lda:
 postmaster_address: postmaster at example.com
auth default:
 cache_size: 1024
 verbose: yes
 passdb:
   driver: pam
   args: session=yes cache_key=%u%s dovecot
 userdb:
   driver: passwd
plugin:
 acl: vfile:/etc/dovecot-acls