$rcmail_config['ldap_public']['ACME'] = array(
  'name'          => 'ACME Directory',
  'hosts'         => array('host.domain.net'),
  'port'          => 389,
  'use_tls'	    => false,
  'user_specific' => false,   // If true the base_dn, bind_dn and bind_pass default to the user's IMAP login.
  // %fu - The full username provided, assumes the username is an email
  //       address, uses the username_domain value if not an email address.
  // %u  - The username prior to the '@'.
  // %d  - The domain name after the '@'.
  'base_dn'       => 'dc=host,dc=domain,dc=net',
  'bind_dn'       => 'uid=%u,cn=users,dc=host,dc=domain,dc=net',
  'bind_pass'     => '',
  'writable'      => false,   // Indicates if we can write to the LDAP directory or not.
  // If writable is true then these fields need to be populated:
  // LDAP_Object_Classes, required_fields, LDAP_rdn
  'LDAP_Object_Classes' => array("top", "inetOrgPerson"), // To create a new contact these are the object classes to specify (or any other classes you wish to use).
  'required_fields'     => array("cn", "sn", "mail"),     // The required fields needed to build a new contact as required by the object classes (can include additional fields not required by the object classes).
  'LDAP_rdn'      => 'mail', // The RDN field that is used for new entries, this field needs to be one of the search_fields, the base of base_dn is appended to the RDN to insert into the LDAP directory.
  'ldap_version'  => 3,       // using LDAPv3
  'search_fields' => array('mail', 'cn'),  // fields to search in
  'name_field'    => 'cn',    // this field represents the contact's name
  'email_field'   => 'mail',  // this field represents the contact's e-mail
  'surname_field' => 'sn',    // this field represents the contact's last name
  'firstname_field' => 'givenName',  // this field represents the contact's first name
  'sort'          => 'cn',    // The field to sort the listing by.
  'scope'         => 'sub',   // search mode: sub|base|list
  'filter'        => '',      // used for basic listing (if not empty) and will be &'d with search queries. example: status=act
  'global_search' => true,    // perform a global search for address auto-completion on compose
  'fuzzy_search'  => true);   // server allows wildcard search