Symantec Messaging Gateway (SMG) is unable to detect some content filtering conditions when the text that would match the configured condition is part of an attached Excel document.
For example, a content compliance rule which attempted to match the "Credit Card Number Keyword" dictionary keywords might not fire in some cases when the matching text is part of a Microsoft Excel attachment depending on how the data was stored in the Excel file.
This is a combination of how some Microsoft Excel files store data internally and how that data is processed internally by SMG.
This issue has been addressed in Symantec Messaging Gateway version 10.0.1-2.
Imported Document ID: TECH198093
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