One of the great advantages of having an Exchange server is that you can use ActiveSync to push emails to your iPhone ( or other ActiveSync enabled device).
This means that emails will show up on your iPhone almost as soon as they arrive in your mail providers Inbox.
For years the de-facto groupware suite was Microsoft Exchange and Outlook. Well as someone who prefers to not use Microsoft products if I can avoid it this has been somewhat of a problem. Sure there have been some projects that replaced some of the functionality of Exchange (Like Zimbra) but there have always been problems. Things just never seemed to work quite right. That is until I tried Zarafa. Zarafa is an Exchange replacement that runs on Linux. Like a lot of recent Open Source projects the company responsible for Zarafa as made available both a Community (Read “free as in beer and speech”) version that has a restriction of 3 connected mapi (Outlook) clients and a paid version that you can pay for per client access license.
The key features of Zarafa are
