Innovation in Mobile Email
1997-2000 Research In Motion Limited
Website: www.blackberry.net 7
Figure 5: BlackBerry Desktop Redirector Status Window
The statistics provided in the Desktop Redirector Status Window (Figure 5) reflect the operation of the
BlackBerry system. When new mail arrives in the user’s inbox, it is either filtered or considered pending to
the handheld. If the message is pending, it is either waiting at the wireless network for delivery to the
handheld or, if the handheld’s queue at the wireless network is full, waiting at the desktop for delivery to
the wireless network.
As a traffic-economizing measure, if the message is read on the desktop while it is waiting at the desktop
for delivery to the wireless network, it will not be forwarded to the handheld.
Once a message arrives at the wireless network, there are two possible outcomes. If the message is
delivered to the handheld, a delivery acknowledgement is sent to the Desktop Redirector from the wireless
network and the “pending” message is now considered “forwarded”. If the handheld is out of coverage for
more than 7 days (e.g. the user is on holidays and turned the handheld off), the wireless network will send a
notice back to the Desktop Redirector and the message is considered “expired”.
Finally, when a message is sent from the handheld, the wireless network forwards it to the Desktop
Redirector where it is placed in the user’s outbox for outbound delivery. At this point, the message is
considered “sent from device”.
Email Reconciliation
A user can manage their inbox on either the handheld or the desktop, with any changes being automatically
synchronized as part of the email reconciliation feature. For example, if a user deletes a message on the
handheld, this change is remembered and updated onto the desktop the next time the user syncs their
handheld. This function can optionally be disabled for those users who wish to accumulate all messages in
their inbox.
Additionally, a user can move a message from the inbox on the handheld to another message folder. All of
the user’s desktop message folders are available on the handheld. This message move will be completed
the next time the user places their handheld into the cradle.
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