Kaspersky Security 9.x for Microsoft Exchange Servers

Configuring the general settings and conditions of an attachment and content filtering rule

9 July 2024

ID 166855

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To configure the general settings and conditions of an attachment and content filtering rule:

  1. In the Management Console tree, select the node of the relevant Security Server.
  2. Select the Server protection node.
  3. In the workspace, select the Protection for the Transport Hub role tab.
  4. In the Attachment and content filtering drop-down section, select the rule that you want to configure.
  5. On the General settings tab, leave the Enable rule check box selected if you want the rule to become active immediately after its configuration.

    If you want to apply the rule immediately after its configuration, clear the check box.

  6. In the Rule name field, change the name of the rule or leave the default value.
  7. In the Action drop-down list, select the action to be taken by the application on content and attachments that meet at least one of the filtering criteria:
    • Allow. The application allows forwarding of the email message containing prohibited attachments or content. This is the default option. To receive information about objects that have been filtered out, you can configure notifications or logging of events in the Windows event log.
    • Delete object. The application removes the object from the attachment or removes the attachment from the email message. The application also adds a file in TXT format to this message; the file contains information about all attachments that have been deleted.

      If forbidden content, such as forbidden words in the body or subject, are detected in the email message, the application will permanently delete the message when this action is selected.

    • Delete message. The application permanently deletes the email message with the attachment or content that has been filtered out. If you select this option, it is recommended that you save copies of messages in Backup to avoid data losses.
  8. Select the Add label to message subject check box if you want the application to add additional text (tag) to the subject of a message containing an attachment or content that has been filtered out. The tag text can be edited. Default tag value: [Blocked attachment or content].

    You can add a tag if you selected the Allow or Delete object action.

  9. If you want a copy of an object to be saved in Backup before the object is processed, select the Save a copy of the object in Backup check box.
  10. In the Add a condition drop-down section, select the criteria that must be met by an object for the filtering rule to be applied to it:
    • Password protection
    • Keywords
    • File name mask
    • Availability of macros
    • File size limit
    • File format

    The application will apply the rule to objects that match at least one of the defined conditions.

  11. To delete a condition, click the Delete button button next to the relevant criterion.
  12. Click the Save button.

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