Alternitives to exchange server ?

This app never gets any publicity. It's a polished alternative to
Exchange.

http://www.samsungcontact.com/en/


entelin@users.sourceforge.net wrote:

>Are there any alternatives to exchange server's groupware features? my
>definition of an alternative would be....
>
>Server runs on Linux
>Has compatibility with evolution and outlook
>preferably opensource
>
>
>

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