Outlook Exchange Server to Open Source Alternatives?

[John Aldrich]

On Monday 08 September 2008, Mike McMullen wrote:
> Hi All,
>
> As part of a larger project to move our company away from Microsoft
> products, I'm investigating options for replacing our enterprise
> exchange server.
>
> We have about 500 mailboxes that would need to ported out as well as
> public folders and contacts/calendars etc.
>
> Can anyone recommend a linux groupware solution that would enable us to
> provide an Outlook like environment? And allows importing of prior data?
>
I'm currently looking at PostPath Email server (http://www.postpath.com) as it 
is supposed to be a drop-in replacement for Exchange. It runs on SuSE, RHEL 
or CentOS (currently 4.5 is the latest version supported by PostPath.) I have 
not yet been able to get it to do a kerberos login and connect to the domain 
though.