Configuring File Attributes

  1. Go to Policies > Policy Objects > Data Identifiers.
  2. Click the File Attributes tab.
  3. Do one of the following:
    • Click Add to create a new entry.

    • Click an entry to change the settings.

  4. Type a name. The name must not exceed 256 characters in length and cannot contain a vertical bar (|).
  5. Type a description that does not exceed 512 characters.
  6. Select an option for attachment file type matching:
    • Selected attachment types: Deep Discovery Email Inspector takes action on messages with attachments of the selected file types.

    • Not the selected attachment types: Deep Discovery Email Inspector takes action on messages with attachments that are not of the selected file types.


    If an attachment is an archive file containing file types that match any of the selected options, Deep Discovery Email Inspector also takes action on the messages.

  7. Select your preferred true file types.
  8. If a file type you want to include is not listed, select Custom file extensions and then type the file type’s extension. Deep Discovery Email Inspector checks files with the specified extension but does not check their true file types. Guidelines when specifying file extensions:
    • Each extension must start with an asterisk (*), followed by a period (.), and then the extension. The asterisk is a wildcard, which represents a file’s actual name. For example, *.pol matches 12345.pol and test.pol.

    • You can include wildcards in extensions. Use a question mark (?) to represent a single character and an asterisk (*) to represent two or more characters. See the following examples:

      - *.*m matches the following files: ABC.dem, ABC.prm, ABC.sdcm

      - *.m*r matches the following files: ABC.mgdr, ABC.mtp2r, ABC.mdmr

      - *.fm? matches the following files: ABC.fme, ABC.fml, ABC.fmp

    • Be careful when adding an asterisk at the end of an extension as this might match parts of a file name and an unrelated extension. For example: *.do* matches abc.doctor_john.jpg and abc.donor12.pdf.

  9. Type the minimum and maximum file sizes and select the unit size. Both file sizes must be whole numbers larger than zero.

    To disable file size matching, type "0" in the fields.

  10. Click Save.