Cisco Cisco Email Security Appliance C190 Guía Del Usuario
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Cisco AsyncOS 8.5.6 for Email User Guide
Chapter 9 Using Message Filters to Enforce Email Policies
Attachment Scanning
Related Topics
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Viewing the Verdict Score of a Particular Message
To see the verdict score for a particular message, you can view the mail logs. The mail logs display the
image name or file name, the score for a particular message attachment. In addition, the log displays
information about whether the images in a file were scannable or unscannable. Note that information in
the log describes the result for each message attachment, rather than each image. For example, if the
message had a zip attachment that contained a JPEG image, the log entry would contain the name of the
zip file rather than the name of the JPEG. Also, if the zip file included multiple images then the log entry
would include the maximum score of all the images. The unscannable notation indicates whether any of
the images were unscannable.
image name or file name, the score for a particular message attachment. In addition, the log displays
information about whether the images in a file were scannable or unscannable. Note that information in
the log describes the result for each message attachment, rather than each image. For example, if the
message had a zip attachment that contained a JPEG image, the log entry would contain the name of the
zip file rather than the name of the JPEG. Also, if the zip file included multiple images then the log entry
would include the maximum score of all the images. The unscannable notation indicates whether any of
the images were unscannable.
The log does not contain information about how the scores translate to a particular verdict (clean, suspect
or inappropriate). However, because you can use mail logs to track the delivery of specific messages,
you can determine by the actions performed on the messages whether the mail contained inappropriate
or suspect images.
or inappropriate). However, because you can use mail logs to track the delivery of specific messages,
you can determine by the actions performed on the messages whether the mail contained inappropriate
or suspect images.
Define the image analysis sensitivity. Enter a value between 0 (least
sensitive) and 100 (most sensitive). As sensitivity increases, so does the false positive
rate. The default setting of 65 is recommended.
[65]>
Define the range for a CLEAN verdict. Enter the upper bound of the CLEAN range by
entering a value between 0 and 98. The default setting of 49 is recommended.
[49]>
Define the range for a SUSPECT verdict. Enter the upper bound of the SUSPECT range by
entering a value between 50 and 99. The default setting of 74 is recommended.
[74]>
Would you like to skip scanning of images smaller than a specific size? [Y]>
Please enter minimum image size to scan in pixels, representing either height or width of
a given image.
[100]>