giving up eventually
It's down again - really, I am not able to find any reason.
Fresh install of CentOS 4.2 on AMD Sempron with 2 GB RAM
Zimbra works sometimes - Dies sometimes
No other app on system except Bind is running
Hardly 20 MB of data everyday
Maybe AMD Sempron has problems
Anyways, I will continue to run Zimbra on other systems, ... and hope for it to work well.