At Zarafa Summercamp 2011 Steve Hardy presented two python scripts which use the zarafa python MAPI bindings in order to get the internal Zarafa statistics, so we decided to use this as a base for a Zabbix plugin.
On each host which needs monitoring you need to copy the scripts : zarafa-zabbix-stats-sender and zarafa_configured_cache_size.sh and set them up in cron. Edit both scripts and put/adjust the hostname and zabbix server entries according to each of your monitored hosts.
Both scripts above rely on zabbix_sender in order to send the data to the Zabbix server.
The cron entries are:
Import the XML file in Zabbix using the web interface and associate the host(s) with Template_app_zarafa_stats_active. Create screens as needed.
We recommend to use this together with Paulson McIntyre's Apache monitoring script and the Mysql extended monitoring provided by appaloosa-zabbix-templates as they will give you a good view in your ZCP installation.