Anti-virus protection on all BlackBerry smartphones (BlackBerry Enterprise Solution and BlackBerry Internet Service)
Anti-virus protection through the BlackBerry Enterprise Solution
The BlackBerry Enterprise Solution is designed to provide anti-virus protection through its malware protection. The BlackBerry Enterprise Solution includes tools that provide out-of-the-box protection against all malware. Administrators can use IT policy and application control policies on the BlackBerry Enterprise Server, and BlackBerry smartphone users can use application controls on BlackBerry smartphones to contain malware by controlling third-party Java application access to BlackBerry smartphone resources and applications. See “Protecting the BlackBerry device platform against malware” for more information on using the BlackBerry Enterprise
Solution tools to protect a BlackBerry deployment against malware.
The BlackBerry® Internet Service has an anti-spam system that is designed to block spam email messages that are sent to your BlackBerry email address. This feature helps to protect you against the inconvenience and potential privacy threat of email messages that are not intended specifically for you.
For additional control of spam email messages, you can create email message filters to prevent unwanted email messages from being delivered to your BlackBerry device.
taken from BlackBerry User Group Malaysia