[Dovecot] Fatal: Running as root isn't permitted

[Juan Asensio Sánchez]

Hi

I am running Dovecot 1.1RC4, built from the source packages at the
debian repositories (http://xi.rename-it.nl/debian/). When a message
is delivered through the LDA, i get this error:

deliver(******@*****): May 02 14:43:28 Fatal: Running as root isn't permitted

These are my config files:

master.cf:

=======================================
# Dovecot
dovecot unix - n n - - pipe
   flags=DRhu user=dovecot:mail argv=/usr/lib/dovecot/deliver -d $recipient
=======================================

dovecot.conf

=======================================
protocols = imap pop3
listen = 0.0.0.0
login_greeting = Servidor de correo para preparado.
disable_plaintext_auth = no
log_path = /var/log/dovecot.log
info_log_path = /var/log/dovecot-info.log
mail_uid = mailuser
mail_gid = mailgroup

# IMAP configuration
protocol imap {
    mail_plugins = quota imap_quota
}

# POP3 configuration
protocol pop3 {
    pop3_uidl_format = %08Xu%08Xv
    mail_plugins = quota
}

# LDA configuration
protocol lda {
    log_path = /var/log/dovecot-lda.log
    postmaster_address = postmaster
    auth_socket_path = /var/run/dovecot/auth-master
    mail_plugins = quota cmusieve
    global_script_path = /home/vmail/globalsievesrc
}


# LDAP authentication

auth default {

    mechanisms = plain login

    passdb ldap {
        args = /etc/dovecot/dovecot-ldap.conf
    }

    userdb ldap {
        args = /etc/dovecot/dovecot-ldap.conf
    }
    socket listen {
        master {
            path = /var/run/dovecot/auth-master
            mode = 0660
            user = dovecot
            group = mail
        }

        client {
            path = /var/spool/postfix/private/auth
            mode = 0660
            user = postfix
            group = postfix
        }
    }
}
=======================================

dovecot-ldap.conf

=======================================
hosts = 127.0.0.1
auth_bind = yes
ldap_version = 3
base = dc=*******,dc=local
scope = subtree
user_attrs = =home=/var/vmail/%d/%n,mailuserquota=quota=maildir:storage,=mail=maildir:/var/vmail/%d/%n/Maildir
user_filter = (&(objectClass=mailAccount)(mail=%u)(mailenable=OK))
pass_attrs = mail=user,userPassword=password
pass_filter = (&(objectClass=mailAccount)(mail=%u)(mailenable=OK))
default_pass_scheme = CRYPT
=======================================

The folder /var/vmail has these permissions:

pdc-server:~# ls -la /var/vmail/
total 16
drwxrwx---  3 mailuser mailgroup 4096 2008-05-02 14:34 .
drwxr-xr-x 16 root     root      4096 2008-05-02 14:14 ..

Any idea? Thanks in advance.