From the Home screen All tray, select Options. To expand the tray, press the Menu button then select Open Tray.
Select Security Options.
Select Firewall.
Under the General section, select Enable to enable/disable the firewall. Enabled when a check mark is present.
If the firewall is enabled, select the desired service(s) to block. Repeat this step to block additional services. If the firewall is disabled, skip to step 6.
Block Incoming Messages
Text Messages
PIN
Personal Email
Enterprise Email
If desired, select Exception options. If only Contacts is selected, skip to step 6.
Contacts
Incoming messages from the contact list are not blocked.
Specific addresses
Incoming messages from specific addresses (Firewall Exceptions list) are not blocked.
After selecting the desired Exceptions options, select Add.
Press the Menu button then select Add Email Address / Phone Number / PIN.