Note that the actual format of a file may not match its file name extension.
If you enabled filtering of email attachments, the Mail Threat Protection component may rename or delete files with the following extensions:
com – executable file of an application no larger than 64 KB
exe – executable file or self-extracting archive
sys – Microsoft Windows system file
prg – program text for dBase™, Clipper or Microsoft Visual FoxPro®, or a WAVmaker program
bin – binary file
bat – batch file
cmd – command file for Microsoft Windows NT (similar to a bat file for DOS), OS/2
dpl – compressed Borland Delphi library
dll – dynamic link library
scr – Microsoft Windows splash screen
cpl – Microsoft Windows control panel module
ocx – Microsoft OLE (Object Linking and Embedding) object
tsp – program running in split-time mode
drv – device driver
vxd – Microsoft Windows virtual device driver
pif – program information file
lnk – Microsoft Windows link file
reg – Microsoft Windows system registry key file
ini – configuration file which contains configuration data for Microsoft Windows, Windows NT, and some applications
cla – Java class
vbs – Visual Basic® script
vbe – BIOS video extension
js, jse – JavaScript source text
htm – hypertext document
htt – Microsoft Windows hypertext header
hta – hypertext program for Microsoft Internet Explorer®
asp – Active Server Pages script
chm – compiled HTML file
pht – HTML file with integrated PHP scripts
php – script that is integrated into HTML files
wsh – Microsoft Windows Script Host file
wsf – Microsoft Windows script
the – Microsoft Windows 95 desktop wallpaper file
hlp – Win Help file
eml – Microsoft Outlook Express email message
nws – new Microsoft Outlook Express email message
msg – Microsoft Mail email message
plg – email message
mbx – saved Microsoft Office Outlook email message
doc* – Microsoft Office Word documents, such as: doc for Microsoft Office Word documents, docx for Microsoft Office Word 2007 documents with XML support, and docm for Microsoft Office Word 2007 documents with macro support
dot* – Microsoft Office Word document templates, such as: dot for Microsoft Office Word document templates, dotx for Microsoft Office Word 2007 document templates, dotm for Microsoft Office Word 2007 document templates with macro support
fpm – database program, Microsoft Visual FoxPro start file
rtf – Rich Text Format document
shs – Windows Shell Scrap Object Handler fragment
dwg – AutoCAD® drawing database
msi – Microsoft Windows Installer package
otm – VBA project for Microsoft Office Outlook
pdf – Adobe Acrobat document
swf – Shockwave® Flash package object
jpg, jpeg – compressed image graphics format
emf – Enhanced Metafile format file;
ico – object icon file
ov? – Microsoft Office Word executable files
xl* – Microsoft Office Excel documents and files, such as: xla, the extension for Microsoft Office Excel, xlc for diagrams, xlt for document templates, xlsx for Microsoft Office Excel 2007 workbooks, xltm for Microsoft Office Excel 2007 workbooks with macro support, xlsb for Microsoft Office Excel 2007 workbooks in binary (non-XML) format, xltx for Microsoft Office Excel 2007 templates, xlsm for Microsoft Office Excel 2007 templates with macro support, and xlam for Microsoft Office Excel 2007 plug-ins with macro support
pp* – Microsoft Office PowerPoint® documents and files, such as: pps for Microsoft Office PowerPoint slides, ppt for presentations, pptx for Microsoft Office PowerPoint 2007 presentations, pptm for Microsoft Office PowerPoint 2007 presentations with macros support, potx for Microsoft Office PowerPoint 2007 presentation templates, potm for Microsoft Office PowerPoint 2007 presentation templates with macro support, ppsx for Microsoft Office PowerPoint 2007 slide shows, ppsm for Microsoft Office PowerPoint 2007 slide shows with macro support, and ppam for Microsoft Office PowerPoint 2007 plug-ins with macro support
md* – Microsoft Office Access® documents and files, such as: mda for Microsoft Office Access workgroups and mdb for databases
sldx – a Microsoft PowerPoint 2007 slide
sldm – a Microsoft PowerPoint 2007 slide with macro support
thmx – a Microsoft Office 2007 theme
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