You can configure FPE to globally skip file filtering within all compressed files. This functionality can be configured individually for each scan job type.
By default, skipping file filtering within compressed files is disabled for all types of scan jobs, meaning that the standard functionality is to scan the content of compressed files, applying file filters. If you do not want to apply file filter lists to the content of compressed files, you can create a file filter list and set the action to "Skip detect". However, this only works, by default, for .zip, JAR, and OPENXML files.
To skip file filtering within self-extracting executables, IMCMIME files, .gzip archive files, .rar archive files, TAR archive files, and MACBIN binary files if the container matches a file filter list whose action was set to "Skip detect", select the appropriate scan job by using the following procedure.To skip file filtering within compressed files
In the Forefront Protection 2010 for Exchange Server Administrator Console, click Policy Management, and then under the Filters section, click Filter Options.
In the Filters - Filter Options pane, you can select the Skip file filtering within compressed files check box for each scan job type (realtime, scheduled, on-demand, and transport).