If your organization's messaging environment supports highly secure messaging technology such as PGP® encryption or S/MIME encryption, you can configure the BlackBerry® Enterprise Solution to encrypt a message using PGP encryption or S/MIME encryption so that the message remains encrypted when the BlackBerry® Enterprise Server forwards the message to the email applications of recipients. To extend messaging security, the sender and recipient must install highly secure messaging technology on the computers that host the email applications and on their BlackBerry devices, and you must configure the devices to use the highly secure messaging technology.