Zimbra is open source server software for email and collaboration - email, group calendar, contacts, instant messaging, file storage and web document management. The Zimbra email and calendar server is available for Linux, Mac OS X and virtualization platforms. Zimbra syncs to smartphones (iPhone, BlackBerry) and desktop clients like Outlook and Thunderbird. Zimbra also features archiving and discovery for compliance. Zimbra can be deployed on-premises or as a hosted email solution.

Zimbra use a specific preauthentication protocol to provide SSO on its application. This protocol is implementated in an LL::NG specific Handler.

Zimbra can also be connected to LL::NG via SAML protocol (see Zimbra blog).

The integration with LL::NG is the following:

  • A special URL is declared in application menu (like
  • A Zimbra Handler is called
  • Handler build the preauth request and redirect user on Zimbra preauth URL
  • Then Zimbra do the SSO by setting a cookie in user's browser

You need to get a preauth key from Zimbra server.

See how to do this on Zimbra wiki.

You will configure Zimbra virtual host like other protected virtual host but you will use Zimbra Handler instead of default Handler.

<VirtualHost *>
       # Load Zimbra Handler
       PerlRequire Lemonldap/NG/Handler/Specific/
       PerlHeaderParserHandler Lemonldap::NG::Handler::Specific::ZimbraPreAuth

Go to the Manager and create a new virtual host for Zimbra.

Just configure the access rules.

Go in Manager, Default parameters » Advanced parameters » Special handlers » Zimbra, and edit the different keys:

  • Preauthentication key: the one you grab from zmprov command
  • Account session key: session field used as Zimbra user account (by default: uid)
  • Account type: for Zimbra this can be name, id or foreignKey (by default: id)
  • Preauthentication URL: Zimbra preauthentication URL, either with full URL (ex: http://zimbra.lan/service/preauth), either only with path (ex: /service/preauth) (by default: /service/preauth)
  • Local SSO URL pattern: regular expression to match the SSO URL (by default: ^/zimbrasso$)