[Dovecot] Override quota rules based on mail's content

[Andreas Calvo Gómez]

Hi,
I've a mail server with Postfix and Dovecot, using a LDAP backend to get
the users.
I've also configure quota rules, and I'm able to get the quota from
LDAP.
But I need the mails that come from the local domain to bypass the quota
rule and be delivered to the users' inbox.
Is there any way to do that?

Information required by Dovecot's mailing list rules:

+++ dovecot.conf +++
# 1.1.11: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.28-15-server x86_64 Ubuntu 9.04 ext4
log_timestamp: %Y-%m-%d %H:%M:%S 
protocols: imap
disable_plaintext_auth: no
login_dir: /var/run/dovecot/login
login_executable: /usr/lib/dovecot/imap-login
login_user: postfix
valid_chroot_dirs: /var/spool/dovecot
first_valid_uid: 1000
first_valid_gid: 512
mail_privileged_group: mail
mail_location: maildir:/var/spool/dovecot/%n/
mail_plugins: quota imap_quota
imap_client_workarounds: delay-newmail outlook-idle netscape-eoh
tb-extra-mailbox-sep
auth default:
  mechanisms: plain login
  default_realm: esci.es
  username_format: %Lu
  passdb:
    driver: pam
  passdb:
    driver: ldap
    args: /etc/dovecot/dovecot-ldap.conf
  userdb:
    driver: prefetch
  userdb:
    driver: passwd
  userdb:
    driver: ldap
    args: /etc/dovecot/dovecot-ldap-userdb.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: mail
      group: mail
plugin:
  quota: maildir:User quota
  quota_rule: *:storage=50M
  quota_rule2: Trash:ignore

+++ dovecot-ldap.conf +++
hosts = ldap.esci.es
auth_bind = yes
ldap_version = 3
base = ou=Users, dc=esci, dc=es
scope = subtree
user_attrs =
homeDirectory=home,uidNumber=uid,gidNumber=gid,mailQuota=quota_rule=*:storage=%$M
user_filter = (&(objectClass=posixAccount)(|(mail=%u)(uid=%u)(uid=%n)))
pass_attrs = uid=user,userPassword=password,\

homeDirectory=userdb_home,uidNumber=userdb_uid,gidNumber=userdb_gid,mailQuota=userdb_quota_rule=*:storage=%$M
pass_filter = (&(objectClass=posixAccount)(|(mail=%u)(uid=%u)))
default_pass_scheme = SSHA

Thanks.
---------------------
Andreas Calvo Gómez <andreas.calvo at admi.esci.es>
Dept. Informàtica ESCI
Pg. Pujades, 1 08003 Barcelona
tel. (34) 932954710 ext.233 fax. (34) 932954720
http://www.esci.es
--------------------