Probably that Courier is attempting an LDAP V2 bind, but your slapd only allows V3. There is a configuration setting something like "allow v2 bind" which you can set in slapd.conf (I can't remember what it is exactly, but you can find it in the OpenLDAP docs)
allow bind_v2
Postfix needs it, too. -- Cheers, Petri
Metis / Petri Riihikallio GSM: +358 400 505 939
