Cisco Cisco Email Security Appliance C160 Mode D'Emploi

The image analysis filter rule allows you to determine the actions to take based on the following verdicts:

Clean: The image is free of inappropriate content. The image analysis verdict is computed on the 
message as a whole, so a message without any images will receive a "clean" verdict if scanned.

Suspect: The image may contain inappropriate content.

Inappropriate: The image contains inappropriate content.

These verdicts represent a numeric value assigned by the image analyzer algorithm to determine 
probability of inappropriate content. 

The following values are recommended:

Clean: 0  to 49

Suspect: 50 to 74

Inappropriate: 75 to 100

You can fine-tune image scanning by configuring the sensitivity setting, which helps reduce the number 
of false positives. For example, if you find that you are getting false positives, you can decrease the 
sensitivity setting. Or, conversely, if you find that the image scanning is missing inappropriate content, 
you may want to set the sensitivity higher. The sensitivity setting is a value between 0 (no sensitivity) 
and 100 (highly sensitive). The default sensitivity setting of 65 is recommended.

Go to Security Services > IronPort Image Analysis. 

Click Edit Settings.