Cisco Cisco Email Security Appliance C170 ユーザーガイド
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User Guide for AsyncOS 9.8 for Cisco Email Security Appliances
Chapter 9 Using Message Filters to Enforce Email Policies
Attachment Scanning
Step 4
Under Conditions, click Add Condition.
Step 5
Under Attachment File Info, click Image Analysis Verdict.
Step 6
Choose from one of the following verdicts:
•
Suspect
•
Inappropriate
•
Suspect or Inappropriate
•
Unscannable
•
Clean
Step 7
Click Add Action.
Step 8
Select an action to perform on messages based on the image analysis verdict.
Step 9
Submit and commit your changes.
Notifications
Using the Text Resources page in the GUI or the
textconfig
CLI command to configure custom
notification templates as text resources is another useful tool when used in conjunction with attachment
filtering rules. The notification template supports non-ASCII characters (you are prompted to choose an
encoding while creating the template).
filtering rules. The notification template supports non-ASCII characters (you are prompted to choose an
encoding while creating the template).
In the following example, the
textconfig
command was first used to create a notification template
named
strip.mp3
that will be inserted into to the body of the notification message. Then, an attachment
filtering rule is created so that when an .mp3 file has been stripped from a message, a notification email
is sent to the intended recipients explaining that the .mp3 file has been deleted.
is sent to the intended recipients explaining that the .mp3 file has been deleted.
For more information, see
.
Examples of Attachment Scanning Message Filters
The following examples shows actions performed on attachments:
•
•
•
•
drop-mp3s:
if (attachment-type == '*/mp3')
{ drop-attachments-by-filetype('Media');
notify ('$EnvelopeRecipients', 'Your mp3 has been removed', '$EnvelopeFrom',
'strip.mp3');
}