What sort of attachments can I include in an email?

.3dm x-world/x-3dmf

.3dmf x-world/x-3dmf

.a application/octet-stream

.aab application/x-authorware-bin

.aam application/x-authorware-map

.aas application/x-authorware-seg

.abc text/vnd.abc

.acgi text/html

.afl video/animaflex

.ai application/postscript

.aif audio/aiff

.aif audio/x-aiff

.aifc audio/aiff

.aifc audio/x-aiff

.aiff audio/aiff

.aiff audio/x-aiff

.aim application/x-aim

.aip text/x-audiosoft-intra

.ani application/x-navi-animation

.aos application/x-nokia-9000-communicator-add-on-software

.aps application/mime

.arc application/octet-stream

.arj application/arj

.arj application/octet-stream

.art image/x-jg

.asf video/x-ms-asf

.asm text/x-asm

.asp text/asp

.asx application/x-mplayer2

.asx video/x-ms-asf

.asx video/x-ms-asf-plugin

.au audio/basic

.au audio/x-au

.avi application/x-troff-msvideo

.avi video/avi

.avi video/msvideo

.avi video/x-msvideo

.avs video/avs-video

.bcpio application/x-bcpio

.bin application/mac-binary

.bin application/macbinary

.bin application/octet-stream

.bin application/x-binary

.bin application/x-macbinary

.bm image/bmp

.bmp image/bmp

.bmp image/x-windows-bmp

.boo application/book

.book application/book

.boz application/x-bzip2

.bsh application/x-bsh

.bz application/x-bzip

.bz2 application/x-bzip2

.c text/plain

.c text/x-c

.c++ text/plain

.cat application/vnd.ms-pki.seccat

.cc text/plain

.cc text/x-c

.ccad application/clariscad

.cco application/x-cocoa

.cdf application/cdf

.cdf application/x-cdf

.cdf application/x-netcdf

.cer application/pkix-cert

.cer application/x-x509-ca-cert

.cha application/x-chat

.chat application/x-chat

.class application/java

.class application/java-byte-code

.class application/x-java-class

.com application/octet-stream

.com text/plain

.conf text/plain

.cpio application/x-cpio

.cpp text/x-c

.cpt application/mac-compactpro

.cpt application/x-compactpro

.cpt application/x-cpt

.crl application/pkcs-crl

.crl application/pkix-crl

.crt application/pkix-cert

.crt application/x-x509-ca-cert

.crt application/x-x509-user-cert

.csh application/x-csh

.csh text/x-script.csh

.css application/x-pointplus

.css text/css

.cxx text/plain

.dcr application/x-director

.deepv application/x-deepv

.def text/plain

.der application/x-x509-ca-cert

.dif video/x-dv

.dir application/x-director

.dl video/dl

.dl video/x-dl

.doc application/msword

.dot application/msword

.dp application/commonground

.drw application/drafting

.dump application/octet-stream

.dv video/x-dv

.dvi application/x-dvi

.dwf drawing/x-dwf (old)

.dwf model/vnd.dwf

.dwg application/acad

.dwg image/vnd.dwg

.dwg image/x-dwg

.dxf application/dxf

.dxf image/vnd.dwg

.dxf image/x-dwg

.dxr application/x-director

.el text/x-script.elisp

.elc application/x-bytecode.elisp (compiled elisp)

.elc application/x-elc

.env application/x-envoy

.eps application/postscript

.es application/x-esrehber

.etx text/x-setext

.evy application/envoy

.evy application/x-envoy

.exe application/octet-stream

.f text/plain

.f text/x-fortran

.f77 text/x-fortran

.f90 text/plain

.f90 text/x-fortran

.fdf application/vnd.fdf

.fif application/fractals

.fif image/fif

.fli video/fli

.fli video/x-fli

.flo image/florian

.flx text/vnd.fmi.flexstor

.fmf video/x-atomic3d-feature

.for text/plain

.for text/x-fortran

.fpx image/vnd.fpx

.fpx image/vnd.net-fpx

.frl application/freeloader

.funk audio/make

.g text/plain

.g3 image/g3fax

.gif image/gif

.gl video/gl

.gl video/x-gl

.gsd audio/x-gsm

.gsm audio/x-gsm

.gsp application/x-gsp

.gss application/x-gss

.gtar application/x-gtar

.gz application/x-compressed

.gz application/x-gzip

.gzip application/x-gzip

.gzip multipart/x-gzip

.h text/plain

.h text/x-h

.hdf application/x-hdf

.help application/x-helpfile

.hgl application/vnd.hp-hpgl

.hh text/plain

.hh text/x-h

.hlb text/x-script

.hlp application/hlp

.hlp application/x-helpfile

.hlp application/x-winhelp

.hpg application/vnd.hp-hpgl

.hpgl application/vnd.hp-hpgl

.hqx application/binhex

.hqx application/binhex4

.hqx application/mac-binhex

.hqx application/mac-binhex40

.hqx application/x-binhex40

.hqx application/x-mac-binhex40

.hta application/hta

.htc text/x-component

.htm text/html

.html text/html

.htmls text/html

.htt text/webviewhtml

.htx text/html

.ice x-conference/x-cooltalk

.ico image/x-icon

.idc text/plain

.ief image/ief

.iefs image/ief

.iges application/iges

.iges model/iges

.igs application/iges

.igs model/iges

.ima application/x-ima

.imap application/x-httpd-imap

.inf application/inf

.ins application/x-internett-signup

.ip application/x-ip2

.isu video/x-isvideo

.it audio/it

.iv application/x-inventor

.ivr i-world/i-vrml

.ivy application/x-livescreen

.jam audio/x-jam

.jav text/plain

.jav text/x-java-source

.java text/plain

.java text/x-java-source

.jcm application/x-java-commerce

.jfif image/jpeg

.jfif image/pjpeg

.jfif-tbnl image/jpeg

.jpe image/jpeg

.jpe image/pjpeg

.jpeg image/jpeg

.jpeg image/pjpeg

.jpg image/jpeg

.jpg image/pjpeg

.jps image/x-jps

.js application/x-javascript

.js application/javascript

.js application/ecmascript

.js text/javascript

.js text/ecmascript

.jut image/jutvision

.kar audio/midi

.kar music/x-karaoke

.ksh application/x-ksh

.ksh text/x-script.ksh

.la audio/nspaudio

.la audio/x-nspaudio

.lam audio/x-liveaudio

.latex application/x-latex

.lha application/lha

.lha application/octet-stream

.lha application/x-lha

.lhx application/octet-stream

.list text/plain

.lma audio/nspaudio

.lma audio/x-nspaudio

.log text/plain

.lsp application/x-lisp

.lsp text/x-script.lisp

.lst text/plain

.lsx text/x-la-asf

.ltx application/x-latex

.lzh application/octet-stream

.lzh application/x-lzh

.lzx application/lzx

.lzx application/octet-stream

.lzx application/x-lzx

.m text/plain

.m text/x-m

.m1v video/mpeg

.m2a audio/mpeg

.m2v video/mpeg

.m3u audio/x-mpequrl

.man application/x-troff-man

.map application/x-navimap

.mar text/plain

.mbd application/mbedlet

.mc$ application/x-magic-cap-package-1.0

.mcd application/mcad

.mcd application/x-mathcad

.mcf image/vasa

.mcf text/mcf

.mcp application/netmc

.me application/x-troff-me

.mht message/rfc822

.mid application/x-midi

.mid audio/midi

.mid audio/x-mid

.mid audio/x-midi

.mid music/crescendo

.mid x-music/x-midi

.midi application/x-midi

.midi audio/midi

.midi audio/x-mid

.midi audio/x-midi

.midi music/crescendo

.midi x-music/x-midi

.mif application/x-frame

.mif application/x-mif

.mime message/rfc822

.mime www/mime

.mjf audio/x-vnd.audioexplosion.mjuicemediafile

.mjpg video/x-motion-jpeg

.mm application/base64

.mm application/x-meme

.mme application/base64

.mod audio/mod

.mod audio/x-mod

.moov video/quicktime

.mov video/quicktime

.movie video/x-sgi-movie

.mp2 audio/mpeg

.mp2 audio/x-mpeg

.mp2 video/mpeg

.mp2 video/x-mpeg

.mp2 video/x-mpeq2a

.mp3 audio/mpeg3

.mp3 audio/x-mpeg-3

.mp3 video/mpeg

.mp3 video/x-mpeg

.mpa audio/mpeg

.mpa video/mpeg

.mpc application/x-project

.mpe video/mpeg

.mpeg video/mpeg

.mpg audio/mpeg

.mpg video/mpeg

.mpga audio/mpeg

.mpp application/vnd.ms-project

.mpt application/x-project

.mpv application/x-project

.mpx application/x-project

.mrc application/marc

.ms application/x-troff-ms

.mv video/x-sgi-movie

.my audio/make

.mzz application/x-vnd.audioexplosion.mzz

.nap image/naplps

.naplps image/naplps

.nc application/x-netcdf

.ncm application/vnd.nokia.configuration-message

.nif image/x-niff

.niff image/x-niff

.nix application/x-mix-transfer

.nsc application/x-conference

.nvd application/x-navidoc

.o application/octet-stream

.oda application/oda

.omc application/x-omc

.omcd application/x-omcdatamaker

.omcr application/x-omcregerator

.p text/x-pascal

.p10 application/pkcs10

.p10 application/x-pkcs10

.p12 application/pkcs-12

.p12 application/x-pkcs12

.p7a application/x-pkcs7-signature

.p7c application/pkcs7-mime

.p7c application/x-pkcs7-mime

.p7m application/pkcs7-mime

.p7m application/x-pkcs7-mime

.p7r application/x-pkcs7-certreqresp

.p7s application/pkcs7-signature

.part application/pro_eng

.pas text/pascal

.pbm image/x-portable-bitmap

.pcl application/vnd.hp-pcl

.pcl application/x-pcl

.pct image/x-pict

.pcx image/x-pcx

.pdb chemical/x-pdb

.pdf application/pdf

.pfunk audio/make

.pfunk audio/make.my.funk

.pgm image/x-portable-graymap

.pgm image/x-portable-greymap

.pic image/pict

.pict image/pict

.pkg application/x-newton-compatible-pkg

.pko application/vnd.ms-pki.pko

.pl text/plain

.pl text/x-script.perl

.plx application/x-pixclscript

.pm image/x-xpixmap

.pm text/x-script.perl-module

.pm4 application/x-pagemaker

.pm5 application/x-pagemaker

.png image/png

.pnm application/x-portable-anymap

.pnm image/x-portable-anymap

.pot application/mspowerpoint

.pot application/vnd.ms-powerpoint

.pov model/x-pov

.ppa application/vnd.ms-powerpoint

.ppm image/x-portable-pixmap

.pps application/mspowerpoint

.pps application/vnd.ms-powerpoint

.ppt application/mspowerpoint

.ppt application/powerpoint

.ppt application/vnd.ms-powerpoint

.ppt application/x-mspowerpoint

.ppz application/mspowerpoint

.pre application/x-freelance

.prt application/pro_eng

.ps application/postscript

.psd application/octet-stream

.pvu paleovu/x-pv

.pwz application/vnd.ms-powerpoint

.py text/x-script.phyton

.pyc application/x-bytecode.python

.qcp audio/vnd.qcelp

.qd3 x-world/x-3dmf

.qd3d x-world/x-3dmf

.qif image/x-quicktime

.qt video/quicktime

.qtc video/x-qtc

.qti image/x-quicktime

.qtif image/x-quicktime

.ra audio/x-pn-realaudio

.ra audio/x-pn-realaudio-plugin

.ra audio/x-realaudio

.ram audio/x-pn-realaudio

.ras application/x-cmu-raster

.ras image/cmu-raster

.ras image/x-cmu-raster

.rast image/cmu-raster

.rexx text/x-script.rexx

.rf image/vnd.rn-realflash

.rgb image/x-rgb

.rm application/vnd.rn-realmedia

.rm audio/x-pn-realaudio

.rmi audio/mid

.rmm audio/x-pn-realaudio

.rmp audio/x-pn-realaudio

.rmp audio/x-pn-realaudio-plugin

.rng application/ringing-tones

.rng application/vnd.nokia.ringing-tone

.rnx application/vnd.rn-realplayer

.roff application/x-troff

.rp image/vnd.rn-realpix

.rpm audio/x-pn-realaudio-plugin

.rt text/richtext

.rt text/vnd.rn-realtext

.rtf application/rtf

.rtf application/x-rtf

.rtf text/richtext

.rtx application/rtf

.rtx text/richtext

.rv video/vnd.rn-realvideo

.s text/x-asm

.s3m audio/s3m

.saveme application/octet-stream

.sbk application/x-tbook

.scm application/x-lotusscreencam

.scm text/x-script.guile

.scm text/x-script.scheme

.scm video/x-scm

.sdml text/plain

.sdp application/sdp

.sdp application/x-sdp

.sdr application/sounder

.sea application/sea

.sea application/x-sea

.set application/set

.sgm text/sgml

.sgm text/x-sgml

.sgml text/sgml

.sgml text/x-sgml

.sh application/x-bsh

.sh application/x-sh

.sh application/x-shar

.sh text/x-script.sh

.shar application/x-bsh

.shar application/x-shar

.shtml text/html

.shtml text/x-server-parsed-html

.sid audio/x-psid

.sit application/x-sit

.sit application/x-stuffit

.skd application/x-koan

.skm application/x-koan

.skp application/x-koan

.skt application/x-koan

.sl application/x-seelogo

.smi application/smil

.smil application/smil

.snd audio/basic

.snd audio/x-adpcm

.sol application/solids

.spc application/x-pkcs7-certificates

.spc text/x-speech

.spl application/futuresplash

.spr application/x-sprite

.sprite application/x-sprite

.src application/x-wais-source

.ssi text/x-server-parsed-html

.ssm application/streamingmedia

.sst application/vnd.ms-pki.certstore

.step application/step

.stl application/sla

.stl application/vnd.ms-pki.stl

.stl application/x-navistyle

.stp application/step

.sv4cpio application/x-sv4cpio

.sv4crc application/x-sv4crc

.svf image/vnd.dwg

.svf image/x-dwg

.svr application/x-world

.svr x-world/x-svr

.swf application/x-shockwave-flash

.t application/x-troff

.talk text/x-speech

.tar application/x-tar

.tbk application/toolbook

.tbk application/x-tbook

.tcl application/x-tcl

.tcl text/x-script.tcl

.tcsh text/x-script.tcsh

.tex application/x-tex

.texi application/x-texinfo

.texinfo application/x-texinfo

.text application/plain

.text text/plain

.tgz application/gnutar

.tgz application/x-compressed

.tif image/tiff

.tif image/x-tiff

.tiff image/tiff

.tiff image/x-tiff

.tr application/x-troff

.tsi audio/tsp-audio

.tsp application/dsptype

.tsp audio/tsplayer

.tsv text/tab-separated-values

.turbot image/florian

.txt text/plain

.uil text/x-uil

.uni text/uri-list

.unis text/uri-list

.unv application/i-deas

.uri text/uri-list

.uris text/uri-list

.ustar application/x-ustar

.ustar multipart/x-ustar

.uu application/octet-stream

.uu text/x-uuencode

.uue text/x-uuencode

.vcd application/x-cdlink

.vcs text/x-vcalendar

.vda application/vda

.vdo video/vdo

.vew application/groupwise

.viv video/vivo

.viv video/vnd.vivo

.vivo video/vivo

.vivo video/vnd.vivo

.vmd application/vocaltec-media-desc

.vmf application/vocaltec-media-file

.voc audio/voc

.voc audio/x-voc

.vos video/vosaic

.vox audio/voxware

.vqe audio/x-twinvq-plugin

.vqf audio/x-twinvq

.vql audio/x-twinvq-plugin

.vrml application/x-vrml

.vrml model/vrml

.vrml x-world/x-vrml

.vrt x-world/x-vrt

.vsd application/x-visio

.vst application/x-visio

.vsw application/x-visio

.w60 application/wordperfect6.0

.w61 application/wordperfect6.1

.w6w application/msword

.wav audio/wav

.wav audio/x-wav

.wb1 application/x-qpro

.wbmp image/vnd.wap.wbmp

.web application/vnd.xara

.wiz application/msword

.wk1 application/x-123

.wmf windows/metafile

.wml text/vnd.wap.wml

.wmlc application/vnd.wap.wmlc

.wmls text/vnd.wap.wmlscript

.wmlsc application/vnd.wap.wmlscriptc

.word application/msword

.wp application/wordperfect

.wp5 application/wordperfect

.wp5 application/wordperfect6.0

.wp6 application/wordperfect

.wpd application/wordperfect

.wpd application/x-wpwin

.wq1 application/x-lotus

.wri application/mswrite

.wri application/x-wri

.wrl application/x-world

.wrl model/vrml

.wrl x-world/x-vrml

.wrz model/vrml

.wrz x-world/x-vrml

.wsc text/scriplet

.wsrc application/x-wais-source

.wtk application/x-wintalk

.xbm image/x-xbitmap

.xbm image/x-xbm

.xbm image/xbm

.xdr video/x-amt-demorun

.xgz xgl/drawing

.xif image/vnd.xiff

.xl application/excel

.xla application/excel

.xla application/x-excel

.xla application/x-msexcel

.xlb application/excel

.xlb application/vnd.ms-excel

.xlb application/x-excel

.xlc application/excel

.xlc application/vnd.ms-excel

.xlc application/x-excel

.xld application/excel

.xld application/x-excel

.xlk application/excel

.xlk application/x-excel

.xll application/excel

.xll application/vnd.ms-excel

.xll application/x-excel

.xlm application/excel

.xlm application/vnd.ms-excel

.xlm application/x-excel

.xls application/excel

.xls application/vnd.ms-excel

.xls application/x-excel

.xls application/x-msexcel

.xlt application/excel

.xlt application/x-excel

.xlv application/excel

.xlv application/x-excel

.xlw application/excel

.xlw application/vnd.ms-excel

.xlw application/x-excel

.xlw application/x-msexcel

.xm audio/xm

.xml application/xml

.xml text/xml

.xmz xgl/movie

.xpix application/x-vnd.ls-xpix

.xpm image/x-xpixmap

.xpm image/xpm

.x-png image/png

.xsr video/x-amt-showrun

.xwd image/x-xwd

.xwd image/x-xwindowdump

.xyz chemical/x-pdb

.z application/x-compress

.z application/x-compressed

.zip application/x-compressed

.zip application/x-zip-compressed

.zip application/zip

.zip multipart/x-zip

.zoo application/octet-stream

.zsh text/x-script.zsh