[dovecot] ldap config

Hi,

how do I setup the config to use an ldap server for authentification ?

I tried : auth_userdb = ldap:/usr/local/dovecot/etc/dovecot-ldap.conf auth_userdb = ldap:/usr/local/dovecot/etc/ auth_userdb = usr/local/dovecot/etc/dovecot-ldap.conf

however I got an error. What is the correct syntax for the ldap config ?

Regards, Stefan Sels