I'm looking to send our Exchange server packing fairly soon after successfully testing with the free version for a few weeks on an older Dell 2650, using both CentOS 4 and Ubuntu. This past week my shiny new 2950 arrived, and wanting to take full advantage of the large amount of memory installed CentOS 5 x86_64. This is where I've hit a snag however, and it's pretty early on so this will be brief.

The install fails right with the first RPM:

zimbra-core......zimbra-core-4.5.6_GA_1044.RHEL5_64-20070710170037.x86_64.rpm...FAILED
###ERROR###

zimbra-core-4.5.6_GA_1044.RHEL5_64-20070710170037.x86_64.rpm installation failed

However, querying the rpm database it shows that RPM is installed. Has anyone managed to get this combo working? I'd actually prefer using Ubuntu 64, but as that's not a Zimbra option this is where I'm at.