Alternative to MS Exchange

[Rashkae]

Anthony M. Rasat wrote:
> Derek Broughton wrote:
>> Chris G wrote:
>>
>>> On Thu, Dec 04, 2008 at 03:33:30PM +0000, Richard Brown wrote:
>>>> Hi All
>>>>
>>>> Does anyone know of an alternative to MS Exchange that I can run
>>>> through Ubuntu please? Specifically, address and calendar sharing,
>>>> passing memos, emails, etc. Thanks.
>>> The 'obvious' answer is Evolution. 
>> That's the obvious answer to _Outlook_, not Exchange.
> 
> I'd say, Zimbra. There is community edition. The premium edition is way
> too expensive for me. But of course I don't think that would be a matter
> for a fortune 500 company. Or any company that can afford Exchange.
> 

Exchange is actually very inexpensive, if you already have the Windows
Server with Active directory for your users...  That's one of the things
that's been bothering me of late.  If you need the commercial version of
open source solutions (for the exchange plugin that makes them work with
Outlook, for example), they very quickly become more expensive than
exchange.