User Guide

Using Specialized Scanning Tools
228 McAfee VirusScan
2. To restrict this scan operation so that it examines only unread messages,
select the Scan unread messages only checkbox. Depending on which
option you select in Step 1, this means that the extension will scan all
unread messages in your mailbox or in accessible public folders, or all
unread messages within the range you’ve selected.
3. Specify the file types you want the extension to examine. You can:
• Scan compressed files. Select the Compressed files checkbox to
have the E-Mail Scan extension look for viruses in compressed files
and file archives. Although it does give you better protection,
scanning compressed files can lengthen a scan operation.
The extension scans the same types of compressed files and archives
that the VirusScan application does. To see a list of those files and
archives, see “Current list of compressed files scanned” on page 272.
• Scan all files. Select the All Files checkbox to have the E-Mail Scan
extension scan all file types in your mailbox, whatever their file
name extensions.

NOTE: McAfee VirusScan Software recommends that you
choose this option for your first scan operation, or periodically
thereafter, to ensure that your mailbox is virus-free. You can
then limit the scope of later scan operations.
• Choose file types. Viruses cannot infect files that contain no
executable code, whether script, macro, or binary code. You can,
therefore, safely narrow the scope of your scan operations to those
files most susceptible to virus infection. To do so, click the Program
files only button.
To see or designate the file types that the E-Mail Scan extension will
examine, click Extensions. This opens the Program File Extensions
dialog box. To learn about how to change the files listed there, see
“Adding file name extensions for scanning” on page 267.
4. Turn on heuristic scanning. Click Advanced to open the Advanced Scan
Settings dialog box (Figure 7-3).
Figure 7-3. Advanced Scan Settings dialog box