.MSG File Extension

There are 3 file types use the .MSG file extension:

  1. Outlook Mail Message
  2. Outlook Message Item File
  3. Fallout Message File

1. Outlook Mail Message

Outlook Mail Message
  • Developer Microsoft
  • Popularity
    3.7 (87 votes)
  • Category Text Files
  • Format Binary

An MSG file is an email message, contact, appointment, or task created or saved within Microsoft Outlook. It may contain one or more email fields, which includes the date, sender, recipient, subject, and message body, or contact information, appointment details, and one or more task descriptions. MSG files are also compatible with other programs that use Microsoft's Messaging Applications Programming Interface (MAPI).

Software's name License Platforms
45RPM MailRaider Pro 45RPM MailRaider Pro Paid Mac
Aryson Mac MSG Converter Aryson Mac MSG Converter Free Trial Mac
eM Client eM Client Free Trial MacWindows
Encryptomatic MsgViewer Pro Encryptomatic MsgViewer Pro Free Trial Windows
EZ Freeware Free Opener EZ Freeware Free Opener Free Windows
File Viewer for Android File Viewer for Android Free+ Android
File Viewer Plus File Viewer Plus Free Trial Windows
Microsoft Outlook Microsoft Outlook Commercial MacWindows
Mozilla SeaMonkey Mozilla SeaMonkey Open Source LinuxMacWindows

Updated: May 8, 2019

2. Outlook Message Item File

Outlook Message Item File
  • Developer Microsoft
  • Popularity
    3.6 (227 votes)
  • Category Text Files
  • Format Binary

An MSG file is an item, such as an email message, contact, appointment, or task created or saved within Microsoft Outlook. It contains all the information about the item, which includes attachments to an email message. MSG files are primarily used by Outlook but are also supported by other programs that use Microsoft's Messaging Applications Programming Interface (MAPI).

You can open an MSG file with Microsoft Outlook in Windows simply by double-clicking the file. If Outlook is not set as the default application for opening MSG files, you can right-click the file and choose Outlook to open the MSG file. When opened in Outlook, the message will be formatted appropriately to appear the same way it did before it was exported.

You can also open MSG files with other third-party programs, such as Encryptomatic MsgViewer Pro (Windows) and 45RPM MailRaider Pro(macOS).

Software's name License Platforms
45RPM MailRaider Pro 45RPM MailRaider Pro Paid Mac
Aryson Mac MSG Converter Aryson Mac MSG Converter Free Trial Mac
eM Client eM Client Free Trial MacWindows
Encryptomatic MsgViewer Pro Encryptomatic MsgViewer Pro Free Trial Windows
EZ Freeware Free Opener EZ Freeware Free Opener Free Windows
File Viewer for Android File Viewer for Android Free+ Android
File Viewer Plus File Viewer Plus Free Trial Windows
Microsoft Outlook Microsoft Outlook Commercial MacWindows
Mozilla SeaMonkey Mozilla SeaMonkey Open Source LinuxMacWindows

Updated: April 22, 2021

3. Fallout Message File

Fallout Message File
  • Developer Bethesda Softworks
  • Popularity
    3.5 (23 votes)
  • Category Game Files
  • Format Text

File used by Fallout 1 and 2, which are two installments of the post-apocalyptic open world video game series; contains character and item dialogues and in-game messages that are referenced when interacting with characters and items during gameplay.

MSG files are located in the text\english\dialog and text\english\game directories of your game.

Each indexed line of text has three sets of {}. The first set indicates the line index, which is represented by a number. The second set indicates the name of an optional associated .ACM sound file. The third set contains the text that is displayed, whether it be for an observation window or dialogue box.

NOTE: Interplay and Black Isle Studios originally developed Fallout 1 and 2 before Bethesda Softworks acquired the rights.

Software's name License Platforms
Bethesda Softworks Fallout 1 Bethesda Softworks Fallout 1 Paid Windows
Bethesda Softworks Fallout 2 Bethesda Softworks Fallout 2 Commercial Windows
Microsoft Notepad Microsoft Notepad Bundled MacWindows
Microsoft WordPad Microsoft WordPad Bundled Windows

Updated: September 22, 2016

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