The key logger created in Chapter 8 can be enhanced to log from only e-mail applications, and the network filter created in Chapter 7 can be enhanced to sift through low-level protocols and piece together e-mail; but in a business environment where Microsoft Exchange Server or Lotus Domino Server is being used, there is a better way. These corporate e-mail solutions provide the capability to extend client functionality through the use of specially crafted Dynamic Link Libraries. All that is needed to filter e-mail in this environment is an understanding of the extension interface built into the target e-mail system.
This chapter includes the following:
Microsoft Outlook e-mail filtering
Installing an Outlook client filter
Testing the Outlook client extension
Lotus Notes e-mail filtering
Installing a Lotus Notes client filter
Testing the Lotus Notes client extension