[TriLUG] I see an exchange server in my future

[Neil L. Little]

It appears that there will an Exchange Server in my future. The boss man 
is wedded/addicted to Outlook and cannot be separated from it.
I have been looking around for an Open Source alternative to avoid 
feeding the Evil Empire of Redmond, WA.

My initial search has come up with several candidates such as 
Exchange4Linux, OpenXchange and OpenGroup.

Can anyone suggest to me other alternatives or provide additional input?

The platform will most likely be Ubuntu.

Thanks in advance,

Neil Little, WA4AZL
JARS Forever!!...er TRILUG too!