A few days ago i had same problem, my zimbra :
6.0.1_GA_1816.RHEL5_20090911181524 CentOS5 FOSS edition.
SMTP notification: Oct 8 10:09:12 mx2 zimbramon[14291]: 14291:err: Service status change: mx2.dipekso.info stats changed from running to stopped
SNMP notification: Oct 8 10:09:12 mx2 zimbramon[14291]: 14291:err: Service status change: mx2.dipekso.info stats changed from running to stopped
