ScanMail™ for Microsoft™ Exchange 11.0 Online Help

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Compressed File Handling Parent topic

Compressed files provide a number of special security concerns. Compressed files can be password-protected or encrypted, can harbor so-called "zip-of-death" security risks, and can contain numerous layers of compression.
To balance security and performance, Trend Micro recommends that you consider the following compressed file settings for Attachment Blocking and Security Risk Scan.
Related information