At One Place

.msg files

.msg file
Outlook Message
Outlook's own single-message format, carrying Outlook-specific fields.

What opens a .msg file

Windows
Microsoft Outlook, MSG Viewer tools
macOS
Microsoft Outlook
Linux
msgconvert (libpst) then any mail client

What a .msg file is

MSG is what Outlook writes when you drag a message to the desktop. It uses Microsoft's compound-file structure and keeps Outlook-only properties such as categories, flags and voting buttons that a plain EML would lose. Outlook on Windows and Mac opens it; elsewhere you need a converter or a viewer, since standard mail clients do not read the format.

Converting it

A .msg file is commonly converted to .eml, .pdf, .html or .txt. It is a binary format, so a text editor will show unreadable characters rather than its contents.

Details

Extension
.msg
Full name
Outlook Message
Category
Documents
MIME type
application/vnd.ms-outlook
Created by
Microsoft
Format
Binary

Common questions

How do I open a .msg file?
On Windows use Microsoft Outlook; on macOS use Microsoft Outlook; on Linux use msgconvert (libpst) then any mail client. Outlook's own single-message format, carrying Outlook-specific fields.
What is a .msg file?
Outlook Message. MSG is what Outlook writes when you drag a message to the desktop. It uses Microsoft's compound-file structure and keeps Outlook-only properties such as categories, flags and voting buttons that a plain EML would lose.
Can I convert a .msg file?
Yes. It is usually converted to .eml, .pdf, .html or .txt, either by exporting from one of the programs listed above or with a format converter.

Related pages

Sources

  1. Media Types Registry — IANA
  2. Official vendor product documentation — At One Place

How these figures are compiled and checked