What To Look For? clauses look for conditions that must be met to trigger a content rule.
If a content rule contains multiple clauses,
a message (or web traffic) must meet all the conditions defined by all the clauses
to trigger the content rule. This topic contains a brief overview of all the What To Look For? clauses the
The Download Size Restriction clause specifies the maximum size of files that can be downloaded.
You can configure the size limit by entering a value in Download Size Restriction clause. The default value is 2MB. If a download exceeds the size limit, the download will be aborted.
The Images clause specifies if you wish the system to remove possible embedded data from images in supported file types, such as data encoded using steganographic techniques.
It is impossible to accurately detect the existence of embedded data - for this reason, all images are always sanitized when this feature is active - for example, reprocessing a modified message will trigger a further image sanitization pass.
Image sanitization is disabled by default, but when activated:
Scan text extracted from images (OCR) enables you to use the
You can apply OCR to a selection of multiple languages. English, French, Spanish, German, and Spanish are enabled when you first upgrade or install. We recommend using as few languages as possible to maximize the processing performance and accuracy of text scanning. |
You can also configure the minimum and maximum image sizes that will be processed by the
See Setting Message Processing Limits for more information on image sizes and adding or removing languages.
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