I think you're pointing me in the right direction. I copied the LDAP configuration from version 2.3 to 2.4 and modified it, but perhaps I modified the bind section not correctly. If so, it probably works because an anonymous bind provides the requested data. In that case I need to rethink my access rules in the LDAP.

What if have:

ldap_uris = ldap://localhost
ldap_auth_dn = cn=xxxx,ou=xxxx,dc=abc,dc=xy
ldap_auth_dn_password = secret
ldap_base = ou=xxx,dc=xxx,dc=xx

passdb ldap {...}

userdb ldap {....}

And looking at the documentation now, perhaps it should be:

dict_server {
    dict ldap {
        ldap_uris = ldap://localhost
        ldap_auth_dn = cn=xxxx,ou=xxxx,dc=abc,dc=xy
       ldap_auth_dn_password = secret ldap_base = ou=xxx,dc=xxx,dc=xx
       ldap_deref = never
       ldap_scope = subtree
       ldap_starttls = no
       ssl_client_require_valid_cert = no
  }
}

passdb ldap {...}

userdb ldap {....}



Op 5-2-2026 om 06:23 schreef Aki Tuomi via dovecot:
On 04/02/2026 22:29 EET Ruud Baart via dovecot <[email protected]> wrote:

I'm tired. I have been working many hours now. So it may be that I don't
quite understand you correctly. The conclusion I draw from these
responsen is that there is something strange going on that I can't do
anything about. Dovecot seems to be working fine on my server, so I'm
not immediately concerned.

I checked the exact spelling of the attributes I use. It is as
follows. In the ldif dump: mailBase, mailMessageStore, dovecotQuota,
mailDeliveryAddress and userPassword. And indeed, only userPassword
gives an error.

You are using ldap_bind, which usually means that the driver attempts to bind 
with the user's credentials. I wonder if you intended to use this as you are 
also looking up user's password too.

Aki

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