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Recommended file types to be blocked at the email gateway

    • Updated:
    • 1 Mar 2019
    • Product/Version:
    • Hosted Email Security 2.0
    • Hosted Email Security 3.0
    • Hosted Email Security All
    • InterScan Messaging Security Suite 7.1 Linux
    • InterScan Messaging Security Suite 7.1 Windows
    • InterScan Messaging Security Suite 7.5 Windows
    • InterScan Messaging Security Suite 9.1 Linux
    • InterScan Messaging Security Suite All
    • InterScan Messaging Security Virtual Appliance 9.0
    • Interscan Messaging Security Virtual Appliance 9.0
    • InterScan Messaging Security Virtual Appliance 9.1
    • Interscan Messaging Security Virtual Appliance 9.1
    • Trend Micro Email Security 1
    • Trend Micro Email Security 1.0
    • Platform:
    • N/A N/A
Summary

There are file types recommended to be blocked at the email gateway and are known to be a source of infection/malicious code.

Details
Public

It is recommended to block executable file types since infection risk is high. It may, for example, trigger malicious code or payload upon file click execution. Furthermore, executable file type attachment is not a good security practice.
Other file types may also be filtered (e.g. optional to block for pro-active protection) depending on your business needs, since these files can be normal attachments in most business industries and risk requires user interaction (e.g. the need to decompress, enabling of macro, or loading of disk image).

Executable files types (e.g. binary, scripts and macro-enabled)
  • ·EXE
  • ·SCR
  • ·VBS
  • ·JS
  • .XML
  • .DOCM
  • ·XPS
Image File Types:
  • .ISO
  • .IMG
Archive or Compressed File Types:
  • .ARJ
  • .LZH
  • .R01
  • .R14
  • .R18
  • .R25
  • .TAR
  • .ACE
  • .ZIP
  • .JAR
Document File Types:
  • ·DOC
  • .RTF
  • ·XLS
  • ·PDF
  • .PUB
Premium
Internal
Rating:
Category:
Configure
Solution Id:
1122150
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