What version of ZCS are you running ? Anything reported in your Log Files - Zimbra :: Wiki when this happens ?
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Server | CentOS 5.1 | Dual Opteron 250 | Tyan K8W Mobo | 6GB RAM | 3WARE 9550-SX4 | 4 x Samsung 200GB SATA II |
Zimbra | Release 5.0.9_GA_2533.RHEL5_20080815101705 CentOS5 NETWORK edition running under Xen 3.2.1 CentOS 5.2 i386 VM |
Network | Cisco 877 Router - Cisco ASA 5505 FW - Cisco 1131AP |
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