Is it necessary to use S/MIME or PGP to make the BlackBerry Enterprise Solution secure?
All messages sent between BlackBerry smartphones and the BlackBerry® Enterprise Server are encrypted. However, once a message goes to the mail server outside the corporate firewall, it is sent over the Internet. This is exactly what happens when you send an unencrypted message from a desktop or laptop computer. The S/MIME and PGP solutions provide sender-to-recipient security, from the moment a message leaves a BlackBerry smartphone to the moment it reaches its destination. This ensures that the message cannot be read or modified anywhere along the way.
