[Dovecot] userdb multiple databases

Hello,

I'm trying to configure per user plugins. My original passdb and userdb 

is in a ldap directory (using userdb with prefetch).

To configure per user plugins (in fact, I want to enable quota plugin 

for some users) I need to configure mail_plugins attribute in the userdb.

The problem is that I don't know any ldap attribute to store this 

information (is there any schema with includes an attribute for this). So I want to configure it in a passwd-file file.

My problem is that I don't know if I can chain userdb databases. I know 

I can configure multiple databases, but as far as I know, they are looked in order, so if the user is found in the first one, then is no look for the user in the second one, so I have to configure all user's attributes in the passwd-file database.

Is there any way to chain these lookups?

-- Angel L. Mateo Martínez Sección de Telemática Área de Tecnologías de la Información y las Comunicaciones Aplicadas (ATICA) http://www.um.es/atica Tfo: 868887590 Fax: 868888337