McAfee Security for Microsoft Exchange 8.6.0

Configure file filtering settings

Configure settings in a policy to detect files based on their name, type, or size and take necessary actions.

Task
1 From Policy Manager, select a submenu item that has the File Filtering scanner.
The policy page for the submenu item appears.
2 Click Master policy or any subpolicy you want to configure, then click List All Scanners tab.
3 Click File Filtering.
4 In Activation, select Enable to activate the file filtering scanner settings for the selected submenu item.
If you are configuring settings for a subpolicy, select Use configuration from parent policy to inherit settings from the parent policy.
If you add a scanner to the policy, you can specify a time slot when to enable the scanner, using What time would you like this to apply drop-down list.
5 Select Scan for Embedded files to scan embedded emails.
6 In Alert Selection, click:
Create — To create an alert message when the attachment of an email message is replaced due to a rule being triggered. See Create an alert for more instructions.
View/Hide — To display or hide the preview of the alert message. If the preview is hidden, clicking this link displays it. If the preview is displayed, clicking this link hides it.
7 In File filtering rules and associated actions, from the Available rules drop-down menu, select an available rule. If you want to create new file filtering rules, select <Create new rule...>. See Configure file filtering rules for more instructions on how to create new file filtering rules.

File filtering settings can block restricted files such as .exe files that come as an email attachment. If the .exe file is sent as a password-protected .zip file, although the Password-Protected Files setting is configured to allow the file, the file filtering rule can block the file.

Sometimes you might need to allow the legitimate restricted files that come as a password-protected .zip file. To allow the password-protected .zip file that contains restricted files such as .exe files, you must add the Password protect bypass rule from the Available rules drop-down list.

Make sure that this rule is the first rule in the list. If the rule is already listed at a different level, delete the rule, then select the rule from the Available rules drop-down list.
Make sure that you create separate file filtering rules for each category such as file name, type, and size.
8 Click Change to specify actions that must be taken when a file/attachment in an email message triggers the scanner.
9 Click Delete, to remove an existing rule from the policy.
10 Click Apply to configure these settings to a policy.