Watchguard Firebox X20E Reference Manual page 20

Mime content types list
image/vnd.net-fpx
image/vnd.svf
image/vnd.xiff
image/wavelet
image/x-cals
image/x-cmu-raster
image/x-cmx
image/x-dwg
image/x-dxf
image/x-mgx-dsf
image/x-ms-bmp
image/x-photo-cd
image/x-pict
image/x-png
image/x-portable-anymap
image/x-portable-bitmap
image/x-portable-graymap
image/x-portable-pixmap
image/x-rgb
image/x-svf
image/x-xbitmap
image/x-xwindowdump
image/xpm
message/*
message/delivery-status
message/disposition-notification
message/external-body
message/http
message/news
message/partial
message/rfc822
model/*
model/iges
model/mesh
model/vnd.dwf
model/vrml
multipart/*
multipart/alternative
multipart/appledouble
16
Wavelet-compressed
CALS Type 1 or 2
CMU raster
CMX vector image
AutoCad Drawing
AutoCad DXF file
QuickSilver active image
Microsoft Windows bitmap
Kodak Photo-CD
Macintosh PICT format
Portable Network Graphics format
PNM (UNIX PPM package)
PBM (UNIX PPM package)
PGM (UNIX PPM package)
PPM (UNIX PPM package)
RGB
Simple Vector Format
X-Windows bitmap (b/w)
X Windowdump format
X-Windows pixelmap (8-bit color)
cad files
see RFC 2077
cad files
VRML models