BlackBerry Desktop Software includes the BlackBerry Desktop Redirector, which can be used in a company with Microsoft Exchange but no Blackberry Enterprise Server. The Redirector service does the following:
- Monitors your mailbox for new mail
- Applies your filters to new messages to determine if and how the message is forwarded to your smartphone
- Compresses and encrypts new messages and sends them to your smartphone
- Receives messages that are compressed and encrypted on the smartphone, decompresses and decrypts them, and places them in your inbox
The Redirector does not forward attachments. A computer must remain on in order for messages to forward to the BlackBerry smartphone.
In most situations BlackBerry Internet Service should be used over BlackBerry Desktop Redirector for regular email setup.