 centos
Centos has a wonderful support mailing list, and since it's binary compatible with RH Enterprise, if you ever do change your mind and need support, you can subscribe and get updates directly from RH. (Mostly on the mailing list you see people with RHES converting to Centos updates)
You are not binary compatible if you install any of the centos-plus packages, those are centos additions to the OS and then there is no going back.. (or at least it's much harder...)
I am testing Zimbra on CentOS 4.2, and it's rock solid.
M. |