enable/disable access pop/imap access with openldap+courier imap

[Fernando Gutiérrez Pérez <fgutierrez@ipsistemas.com>]

I 'm trying control with a openldap schema enable/disable imap/pop services 
for some users. I want restrict this services to some  users and control it 
with a ldap schema. I install courier imap/pop server with auth-ldap daemon 
and authentificacion runs ok.
I can't see how to connect openldap with courier imap/pop server and 
control this.
I know that in Netscape Directory Server + Netscape Messaging Server have a 
nsmsgdisallowaccess attribute . something like this?
Anyone  solve this?