The File Extensions Database


  • Developer by: Microsoft Corporation
  • Category: Various data Files

What is an .MSMESSAGESTORE file?

.MSMESSAGESTORE is Windows Mail message information database

The msmessagestore file extension is associated with the Windows Mail client and Windows Live Mail client. File is used to store message properties such as subjects, authors, dates, size etc.

In this database Windows Mail also stores the information about which messages have been downloaded from which accounts. Other use for this database is storing tracks of newsgroups and their lists and the subscriptions.

The msmessagestore database file uses Extensible Storage Engine (ESE) file format. Extensible Storage Engine was developed by Microsoft and introduced in the Microsoft Windows 2000 operating system.

The Extensible Storage Engine (ESE) is an advanced indexed and sequential access method (ISAM) storage technology. ESE enables applications to store and retrieve data from tables using indexed or sequential cursor navigation.

It supports denormalized schemas including wide tables with numerous sparse columns, multi-valued columns, and sparse and rich indexes. It enables applications to enjoy a consistent data state using transacted data update and retrieval.

A crash recovery mechanism is provided so that data consistency is maintained even in the event of a system crash. It provides ACID (Atomic Consistent Isolated Durable) transactions over data and schema by way of a write-ahead log and a snapshot isolation model.

Transactions in ESE are highly concurrent, making ESE useful for server applications. It caches data to maximize high performance access to data. In addition, it is lightweight, making it useful for applications that serve in auxiliary roles.

How to open:

A *.msmessagestore files are meant for internal use of Windows Mail and Windows Live Mail. They can not be opened in any third party applications, because file is locked.

How to convert:

Conversion to other formats is not possible.

How to solve problems with MSMESSAGESTORE files

  • Associate the MSMESSAGESTORE file extension with the correct application. On :
    Windows: Right click on any MSMESSAGESTORE file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.MSMESSAGESTORE files". Mac: Right click (or Ctrl-click) the MSMESSAGESTORE file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .MSMESSAGESTORE is Windows Mail message information database. Because only the current version supports the latest MSMESSAGESTORE file format. Search, therefore, e.g. on the Microsoft Corporation manufacturer website after an available .MSMESSAGESTORE is Windows Mail message information database update.
  • To make sure that your MSMESSAGESTORE file is not corrupted or virus-infected, get the file again and scan it with antivirus software.