Considering an example web application where the application allows uploading files with extension DOC, RTF, XLS, PPT, GIF, JPEG, PDF and MSG. The view page has the list of attachments and allows viewing files by invoking relevant applications. But files with .MSG do not open or do not invoke Outlook to view it.
The solution for this is in fact very simple. Do follow the following steps:
- Open IIS and navigate to the web site
- Right click and choose Properties
- Choose the tab HTTP Headers
- Locate MIME type button and click on it
- Add the extension as .MSG and MIME Type as application/vnd.ms-outlook
- Apply the changes and recheck your web application, it should work
Here is the list of MIME Types supported by Internet Explorer (MIME Types by Content Type):
| Type/sub-type |
Extension |
| application/envoy |
evy |
| application/fractals |
fif |
| application/futuresplash |
spl |
| application/hta |
hta |
| application/internet-property-stream |
acx |
| application/mac-binhex40 |
hqx |
| application/msword |
doc |
| application/msword |
dot |
| application/octet-stream |
* |
| application/octet-stream |
bin |
| application/octet-stream |
class |
| application/octet-stream |
dms |
| application/octet-stream |
exe |
| application/octet-stream |
lha |
| application/octet-stream |
lzh |
| application/oda |
oda |
| application/olescript |
axs |
| application/pdf |
pdf |
| application/pics-rules |
prf |
| application/pkcs10 |
p10 |
| application/pkix-crl |
crl |
| application/postscript |
ai |
| application/postscript |
eps |
| application/postscript |
ps |
| application/rtf |
rtf |
| application/set-payment-initiation |
setpay |
| application/set-registration-initiation |
setreg |
| application/vnd.ms-excel |
xla |
| application/vnd.ms-excel |
xlc |
| application/vnd.ms-excel |
xlm |
| application/vnd.ms-excel |
xls |
| application/vnd.ms-excel |
xlt |
| application/vnd.ms-excel |
xlw |
| application/vnd.ms-outlook |
msg |
| application/vnd.ms-pkicertstore |
sst |
| application/vnd.ms-pkiseccat |
cat |
| application/vnd.ms-pkistl |
stl |
| application/vnd.ms-powerpoint |
pot |
| application/vnd.ms-powerpoint |
pps |
| application/vnd.ms-powerpoint |
ppt |
| application/vnd.ms-project |
mpp |
| application/vnd.ms-works |
wcm |
| application/vnd.ms-works |
wdb |
| application/vnd.ms-works |
wks |
| application/vnd.ms-works |
wps |
| application/winhlp |
hlp |
| application/x-bcpio |
bcpio |
| application/x-cdf |
cdf |
| application/x-compress |
z |
| application/x-compressed |
tgz |
| application/x-cpio |
cpio |
| application/x-csh |
csh |
| application/x-director |
dcr |
| application/x-director |
dir |
| application/x-director |
dxr |
| application/x-dvi |
dvi |
| application/x-gtar |
gtar |
| application/x-gzip |
gz |
| application/x-hdf |
hdf |
| application/x-internet-signup |
ins |
| application/x-internet-signup |
isp |
| application/x-iphone |
iii |
| application/x-javascript |
js |
| application/x-latex |
latex |
| application/x-msaccess |
mdb |
| application/x-mscardfile |
crd |
| application/x-msclip |
clp |
| application/x-msdownload |
dll |
| application/x-msmediaview |
m13 |
| application/x-msmediaview |
m14 |
| application/x-msmediaview |
mvb |
| application/x-msmetafile |
wmf |
| application/x-msmoney |
mny |
| application/x-mspublisher |
pub |
| application/x-msschedule |
scd |
| application/x-msterminal |
trm |
| application/x-mswrite |
wri |
| application/x-netcdf |
cdf |
| application/x-netcdf |
nc |
| application/x-perfmon |
pma |
| application/x-perfmon |
pmc |
| application/x-perfmon |
pml |
| application/x-perfmon |
pmr |
| application/x-perfmon |
pmw |
| application/x-pkcs12 |
p12 |
| application/x-pkcs12 |
pfx |
| application/x-pkcs7-certificates |
p7b |
| application/x-pkcs7-certificates |
spc |
| application/x-pkcs7-certreqresp |
p7r |
| application/x-pkcs7-mime |
p7c |
| application/x-pkcs7-mime |
p7m |
| application/x-pkcs7-signature |
p7s |
| application/x-sh |
sh |
| application/x-shar |
shar |
| application/x-shockwave-flash |
swf |
| application/x-stuffit |
sit |
| application/x-sv4cpio |
sv4cpio |
| application/x-sv4crc |
sv4crc |
| application/x-tar |
tar |
| application/x-tcl |
tcl |
| application/x-tex |
tex |
| application/x-texinfo |
texi |
| application/x-texinfo |
texinfo |
| application/x-troff |
roff |
| application/x-troff |
t |
| application/x-troff |
tr |
| application/x-troff-man |
man |
| application/x-troff-me |
me |
| application/x-troff-ms |
ms |
| application/x-ustar |
ustar |
| application/x-wais-source |
src |
| application/x-x509-ca-cert |
cer |
| application/x-x509-ca-cert |
crt |
| application/x-x509-ca-cert |
der |
| application/ynd.ms-pkipko |
pko |
| application/zip |
zip |
| audio/basic |
au |
| audio/basic |
snd |
| audio/mid |
mid |
| audio/mid |
rmi |
| audio/mpeg |
mp3 |
| audio/x-aiff |
aif |
| audio/x-aiff |
aifc |
| audio/x-aiff |
aiff |
| audio/x-mpegurl |
m3u |
| audio/x-pn-realaudio |
ra |
| audio/x-pn-realaudio |
ram |
| audio/x-wav |
wav |
| image/bmp |
bmp |
| image/cis-cod |
cod |
| image/gif |
gif |
| image/ief |
ief |
| image/jpeg |
jpe |
| image/jpeg |
jpeg |
| image/jpeg |
jpg |
| image/pipeg |
jfif |
| image/svg+xml |
svg |
| image/tiff |
tif |
| image/tiff |
tiff |
| image/x-cmu-raster |
ras |
| image/x-cmx |
cmx |
| image/x-icon |
ico |
| image/x-portable-anymap |
pnm |
| image/x-portable-bitmap |
pbm |
| image/x-portable-graymap |
pgm |
| image/x-portable-pixmap |
ppm |
| image/x-rgb |
rgb |
| image/x-xbitmap |
xbm |
| image/x-xpixmap |
xpm |
| image/x-xwindowdump |
xwd |
| message/rfc822 |
mht |
| message/rfc822 |
mhtml |
| message/rfc822 |
nws |
| text/css |
css |
| text/h323 |
323 |
| text/html |
htm |
| text/html |
html |
| text/html |
stm |
| text/iuls |
uls |
| text/plain |
bas |
| text/plain |
c |
| text/plain |
h |
| text/plain |
txt |
| text/richtext |
rtx |
| text/scriptlet |
sct |
| text/tab-separated-values |
tsv |
| text/webviewhtml |
htt |
| text/x-component |
htc |
| text/x-setext |
etx |
| text/x-vcard |
vcf |
| video/mpeg |
mp2 |
| video/mpeg |
mpa |
| video/mpeg |
mpe |
| video/mpeg |
mpeg |
| video/mpeg |
mpg |
| video/mpeg |
mpv2 |
| video/quicktime |
mov |
| video/quicktime |
qt |
| video/x-la-asf |
lsf |
| video/x-la-asf |
lsx |
| video/x-ms-asf |
asf |
| video/x-ms-asf |
asr |
| video/x-ms-asf |
asx |
| video/x-msvideo |
avi |
| video/x-sgi-movie |
movie |
| x-world/x-vrml |
flr |
| x-world/x-vrml |
vrml |
| x-world/x-vrml |
wrl |
| x-world/x-vrml |
wrz |
| x-world/x-vrml |
xaf |
| x-world/x-vrml |
xof |