Dangerous Attachments

The following file-types (email attachments) in this extension list are being blocked for delivery on all our mail servers. They all have a particular danger of executing or injecting malicious code on a system.

  1. .ADE  - Microsoft Access Data Project Extension file
  2. .ADP  - Microsoft Access Data Project file
  3. .ASF  - Microsoft Advanced Streaming Format file
  4. .ASX  - Microsoft Windows Media Active Stream Redirector file
  5. .BAS  - BASIC Language Source file
  6. .BAT  - Microsoft DOS Batch Processing file
  7. .BIN  - Binary file
  8. .CHM  - Microsoft Compiled HTML Help file
  9. .CMD  - Microsoft Windows NT Command Script file
  10. .COM  - Microsoft DOS Command Application file
  11. .CPL  - Microsoft Windows Control Panel Extension file
  12. .CRT  - Security Certificate file
  13. .CSH  - C Shell Script file
  14. .DBX  - Microsoft Outlook Express E-mail Folder file
  15. .DLL  - Dynamic Link Library file
  16. .DOCM - Microsoft Word Document file, macro-enabled Open XML format
  17. .DOTM - Microsoft Word Template file, macro-enabled Open XML format
  18. .EXE  - Executable Application file
  19. .FXP  - Microsoft Visual FoxPro Compiled Program file
  20. .HIV  - Microsoft Windows Registry Hive file
  21. .HLP  - Microsoft Windows Help file
  22. .HTA  - Hypertext Markup Language Application file
  23. .HTB  - HTTP Browser Database file
  24. .HTM  - Hypertext Markup Language file
  25. .HTML - Hypertext Markup Language file
  26. .INF  - Information Setup file
  27. .INS  - Microsoft Internet Communication Settings file
  28. .ISP  - Microsoft Internet Service Provider Settings file
  29. .JS   - JavaScript / JScript Script file
  30. .JSE  - JScript Encoded Script file
  31. .KSH  - Korn Shell Script file
  32. .LNK  - Microsoft Windows Shortcut Link file
  33. .MDA  - Microsoft Access Add-in file
  34. .MDB  - Microsoft Access Database file
  35. .MDE  - Microsoft Access Encoded Database file
  36. .MDT  - Microsoft Access Database Template file
  37. .MDW  - Microsoft Access Database Wokgroup file
  38. .MDZ  - Microsoft Access Wizard Template file
  39. .MHT  - Multipurpose Internet Mail Extension HTML file
  40. .MSC  - Microsoft Management Console Snap-in Control file
  41. .MSH  - Microsoft Shell Script file
  42. .MSI  - Microsoft Windows Installer Package file
  43. .MSP  - Microsoft Windows Installer Patch file
  44. .MST  - Microsoft Test file
  45. .NCH  - Microsoft Outlook Express Folder file
  46. .OBJ  - Microsoft Object Code file
  47. .OCX  - Microsoft ActiveX Control file
  48. .OFT  - Microsoft Outlook Item Template file
  49. .OPS  - Microsoft Office Profile Settings file
  50. .OVL  - Overlay file
  51. .PCD  - Photo CD Image file
  52. .PIF  - Program Information File
  53. .PL   - Perl Program file
  54. .POTM - Microsoft PowerPoint Template file, macro-enabled Open XML format
  55. .PPA  - Microsoft PowerPoint Add-in file
  56. .PPAM - Microsoft PowerPoint Add-in file, macro-enabled Open XML format
  57. .PPSM - Microsoft PowerPoint Slideshow file, macro-enabled Open XML format
  58. .PPTM - Microsoft PowerPoint Presentation file, macro-enabled Open XML format
  59. .PRF  - Microsoft Outlook Profile Settings file
  60. .PS1  - Microsoft PowerShell Script file
  61. .REG  - Registry Data file
  62. .SCF  - Microsoft Windows Explorer Shell Command File file
  63. .SCR  - Screen Saver file
  64. .SCT  - Windows Script Component file
  65. .SH   - Shell Script file
  66. .SHB  - Shell Shortcut Back Into A Document file
  67. .SHS  - Shell Scrap object file
  68. .SYS  - System file
  69. .URL  - Uniform Resource Locator file
  70. .VB   - Microsoft Visual Basic file
  71. .VBE  - Microsoft VBScript Encoded Script file
  72. .VBS  - Microsoft VBScript Script file
  73. .VSS  - Microsoft Visio Stencil file
  74. .VST  - Microsoft Visio Template file
  75. .VXD  - Virtual Device Driver file
  76. .WMD  - Microsoft Windows Media Download file
  77. .WMS  - Microsoft Windows Media Skin file
  78. .WMV  - Microsoft Windows Media Video file
  79. .WMZ  - Microsoft Windows Media Compressed Skin file
  80. .WSC  - Microsoft Windows Script Component file
  81. .WSF  - Microsoft Windows Script file
  82. .WSH  - Microsoft Windows Script Host Settings file
  83. .XLA  - Microsoft Excel Add-in
  84. .XLAM - Microsoft Excel Add-in, macro-enabled Open XML format
  85. .XLSM - Microsoft Excel Spreadsheet/Workbook file, macro-enabled Open XML format
  86. .XLTM - Microsoft Excel Template file, macro-enabled Open XML format template
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