Research in Motion (RIM) has built its business on selling handhelds with push email. This means that as soon as an incoming email arrives on the server, it is pushed out to the device, and the user is immediately notified of it.
Push email turns out to be a feature that many find addicting, and it has made RIM very profitable. Not surprisingly, other companies are trying to imitate RIM's success. One of these is Microsoft.
Microsoft Exchange Server 2003 offers a limited version of push email now, but the software giant intends to get serious about it in the near future.
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