Есть postfix+ldap, хотелось бы еще сетевой календарь.
поставил davical, создаю там тестовых пользователей - работает. Но на деле нужна аунтификация через ldap.
вот конфиг
<?php
  $c->system_name = "Caldav Server";
  $c->pg_connect[] = 'dbname=davical user=davical_app';
//  $c->use_persistent = true;
//  $c->dbg["ALL"] = 1;
//  $c->dbg["request"] = 1;  
//  $c->dbg['response'] = 1;
//  $c->dbg["component"] = 1;
  $c->dbg['caldav'] = 1;
  $c->dbg['querystring'] = 1;
  $c->dbg['icalendar'] = 1;
  $c->dbg['ics'] = 1;
  $c->dbg['login'] = 1;
  $c->dbg['options'] = 1;
  $c->dbg['get'] = 1;
  $c->dbg['put'] = 1;
  $c->dbg['propfind'] = 1;
  $c->dbg['proppatch'] = 1;
  $c->dbg['report'] = 1;
  $c->dbg['principal'] = 1;
  $c->dbg['user'] = 1;
  $c->dbg['vevent'] = 1;
  $c->dbg['rrule'] = 1;
  $c->authenticate_hook['call'] = 'LDAP_check';
  $c->authenticate_hook['config'] = array(
    'host'          => '192.168.1.245',
    'port'          => '389',
    'bindDN'        => 'cn=admin,dc=mail',
    'passDN'        => 'gfhjkm',
    'filterUsers'    => 'objectClass=*',
    'baseDNGroups'    => 'ou=mailuser,dc=mail',
    'protocolVersion'    => 3,
    'mapping_field'    => array(
                             'username' => 'uid',
                             'updated'  => 'modifyTimestamp',
                             'fullname' => 'cn', // "Common Name"
                             'user_no'  => 'uidNumber',
                             'email'    => 'mail'),
    'format_updated'=> array('Y' => array(0,4),
                             'm' => array(4,2),
                             'd' => array(6,2),
                             'H' => array(8,2),
                             'M' => array(10,2),
                             'S' => array(12,2)),
     'scope' => 'subtree',
  );
  include('drivers_ldap.php');
?>

в логах:
[Tue Sep 21 11:17:50 2010] [error] [client 192.168.1.67] davical: DBG: caldav: User agent: Evolution/2.28.3.1
[Tue Sep 21 11:17:50 2010] [error] [client 192.168.1.67] davical: LOG: :==========> method =OPTIONS= =http://192.168.1.224/icalc/caldav.php= =/antonpl_oit/= =/icalc= =/var=
[Tue Sep 21 11:17:50 2010] [error] [client 192.168.1.67] davical: DBG: caldav:Version (0.9.7) == 9.7
[Tue Sep 21 11:17:50 2010] [error] [client 192.168.1.67] davical: LOG: always: Query: DBGQ: SELECT schema_major, schema_minor, schema_patch FROM awl_db_revision ORDER BY schema_id DESC LIMIT 1;
[Tue Sep 21 11:17:50 2010] [error] [client 192.168.1.67] davical: DBG: caldav: User agent: Evolution/2.28.3.1
[Tue Sep 21 11:17:50 2010] [error] [client 192.168.1.67] davical: ***: ERROR:Couldn't contact LDAP server for authentication