LDAP just for passdb

Hi,

I couldn't find it in the documentation, so I was wondering - is it possible to configure Dovecot to use LDAP for passdb and keep using SQL for userdb?

I would like to do that before I come up with a good strategy to expand my ldap schema to support other mail attributes for virtual domains, aliases, etc.

I am currently using FreeIPA.

Best,

Francis