Horde_Kolab_Session_Base::_initMail PHP Method

    private function _initMail(Horde_Kolab_Server_Object_Hash $user)
    {
        try {
            $this->_data['user']['mail'] = $user->getSingle('mail');
        } catch (Horde_Kolab_Server_Exception_Novalue $e) {
            $this->_data['user']['mail'] = $this->_data['user']['id'];
        }
    }