Innovation in Mobile Email
4 Website: www.blackberry.net
1997-2000 Research In Motion Limited
Figure 3: The BlackBerry Desktop Manager
BlackBerry Redirector – Desktop and Server Solutions
The BlackBerry Desktop and Server Redirectors are the control center for the BlackBerry mobile email
solution. The Redirector is a key component for providing BlackBerry’s innovations in mobile email – the
link between the corporate inbox and the handheld, remote control of the corporate inbox and message
filtering.
Link to Corporate Inbox
Like Microsoft Outlook, the Redirector uses MAPI (Microsoft’s Messaging API) to link to the user’s email
account. Because MAPI provides immediate notification of new email, it is central to the BlackBerry
“push” architecture. Since new email is sent to the handheld as soon as it arrives at the desktop, the user is
notified as soon as email arrives and never has to worry about connecting to their corporate server to check
for new mail. By having the desktop connect to the user, time spent dialing-up and connecting to the
desktop (possibly to find that there is no new email) is eliminated as users of the BlackBerry are notified
virtually instantly of important messages, enabling the user to respond immediately.
As previously mentioned, the Redirector uses MAPI to place messages composed on the handheld in the
user’s Desktop Outbox such that the message originates from the corporate email account with a copy sent
and kept in the user’s Sent Items folder.
Another example of the Redirector’s use of MAPI for advanced functionality is address resolution. In the
normal operation of BlackBerry, users send messages to Internet email addresses whether they are internal
(e.g. name@usercompany.com) or external (e.g. name@othercompany.com). However, in Microsoft
Outlook, the user can send messages to non-Internet addresses as well. For example, the user can compose
a message to “Accounting” and choose “Check Name”. MAPI will examine the Global Address Book, the
Personal Address Book and the Contacts (or a subset of these, depending on the user’s configuration of
MAPI) for a matching entry (e.g. a global or personal distribution list “Accounting” or the address
“accounting@company.com”) If found, that address will be used. The Redirector uses the same MAPI
address lookup used by Microsoft Outlook. Therefore, if the user composes a message to “Accounting” on
the handheld, the Redirector will perform the same address lookup and send the message to the same
destination as Outlook.
The Redirector’s address resolution feature allows the user to take advantage of non-Internet email
addresses such as distribution lists and fax gateways. Users can create personal distribution lists and fax
addresses (if the company has an Exchange fax gateway) in the Personal Address Book on their desktop
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