Nicolas, > server_host = zimbra.pcsol.be
Are you sure your server is running on port 389? Would you run TLS? >From your Postfix machine, can you access the LDAP server on zimbra machine (no firewall)? I would try ldapsearch command on the postfix machine to make sure that all the parameters in ldap-localusers.cf are valid. I think you need to bind in any case, if you do not configure a bind_dn and a bind_pw, it will make an anonymous bind, but I think you have to bind to your LDAP server before you can make a query. If you bind anonymously, you must make sure that the attributes you are searching for are readable. Best regards, Olivier
