Linux Exchange Alternative

G'day all.

Some time ago I had a look at a Linux alternative to M$ Exchange - I 
seem to recall that it had been started by HP, then handed over to 
someone else. It was commercial software (paid) but a realistic 
alternative to Exchange.

I have a client with 6 PCs using Outlook, who now needs an Exchange 
SErver, and is willing to look at a Linux alternative, but I now can't 
find the software i remember.

There seem to be several others, so I wonder: what does everybody think 
is the best option (especially in terms of ease of installation and 
configuration). The main goal is Outlook-based shared calendaring.

-- 

Regards,
Edwin Humphries
Mobile: 0419 233 051
NetSense Computers (Ironstone Technology Pty Ltd)

-- 
SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/
Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html

begin:vcard
fn:Edwin Humphries
n:Humphries;Edwin
org:Ironstone Technology Pty Ltd trading as NetSense Computers
adr:;;79 Barney St;Kiama;NSW;2533;Australia
email;internet:[email protected]
title:Director
tel;work:+61 (0)2 4233 2285
tel;cell:+61 (0)419 233 051
version:2.1
end:vcard