Supported file types for attachments

File Extension	Description	MIME type
.3gp	3GPP multimedia file	video/3gpp
.3g2	3GPP2 multimedia file	video/3gpp2
.7z	7-Zip compressed file	application/x-7z-compressed
.aac	AAC audio	audio/aac
.avi	AVI video file	video/x-msvideo
.bmp	BMP image	image/bmp
.csv	Comma-separated values	text/csv
.doc	Microsoft Word document (97-2003)	application/msword
.docm	Microsoft Word macro-enabled document	application/vnd.ms-word.document.macroEnabled.12
.docx	Microsoft Word document (2007 or later)	application/vnd.openxmlformats-officedocument.wordprocessingml.document
.epub	EPUB e-book file	application/epub+zip
.gif	GIF image	image/gif
.gz	GZIP compressed file	application/gzip
.ico	Icon file	image/vnd.microsoft.icon
.ics	iCalendar file	text/calendar
.jpg, .jpeg	JPEG image	image/jpeg
.json	JSON data	application/json
.mid, .midi	MIDI audio file	audio/midi
.mp3	MP3 audio file	audio/mpeg
.mp4	MP4 video file	video/mp4
.mpeg	MPEG video file	video/mpeg
.oga	Ogg audio file	audio/ogg
.ogv	Ogg video file	video/ogg
.ogx	Ogg file	application/ogg
.one	Microsoft OneNote file	application/onenote
.opus	Opus audio file	audio/opus
.otf	OpenType font	font/otf
.pdf	PDF document	application/pdf
.png	PNG image	image/png
.ppsm	PowerPoint macro-enabled slideshow	application/vnd.ms-powerpoint.slideshow.macroEnabled.12
.ppsx	PowerPoint slideshow	application/vnd.openxmlformats-officedocument.presentationml.slideshow
.ppt	PowerPoint presentation (97-2003)	application/vnd.ms-powerpoint
.pptm	PowerPoint macro-enabled presentation	application/vnd.ms-powerpoint.presentation.macroEnabled.12
.pptx	PowerPoint presentation (2007 or later)	application/vnd.openxmlformats-officedocument.presentationml.presentation
.pub	Microsoft Publisher document	application/vnd.ms-publisher
.rar	RAR compressed file	application/x-rar-compressed
.rpmsg	Outlook email message	application/vnd.ms-outlook
.rtf	Rich Text Format document	application/rtf
.svg	Scalable Vector Graphics image	image/svg+xml
.tar	Tar archive file	application/x-tar
.tif, .tiff	Tagged Image File Format	image/tiff
.ttf	TrueType font	font/ttf
.txt	Text document	text/plain
.vsd	Microsoft Visio drawing	application/vnd.visio
.wav	Waveform Audio File Format	audio/wav
.weba	WebM audio file	audio/webm
.webm	WebM video file	video/webm
.webp	WebP image file	image/webp
.wma	Windows Media Audio file	audio/x-ms-wma
.wmv	Windows Media Video file	video/x-ms-wmv
.woff	Web Open Font Format	font/woff
.woff2	Web Open Font Format 2.0	font/woff2
.xls	Microsoft Excel spreadsheet (97-2003)	application/vnd.ms-excel
.xlsm	Microsoft Excel macro-enabled spreadsheet	application/vnd.ms-excel.sheet.macroEnabled.12
.xlsx	Microsoft Excel spreadsheet (Open XML)	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
.xml	Extensible Markup Language file	application/xml
.log	Log file	text/plain
.zip	zip file	application/zip