MSF File Extension

MSF file icon
Mail Summary Format
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What is MSF file?

MSF file format is used by many mail user agents (email client applications) such as Mozilla Thunderbird. The file, however, doesn’t store email message body , only sent or received message index, i.e. the message header and summary of the contents.

How does MSF format work?

MSF index file is created along with second file, MBOX, which is used for different tasks. Each email folder (Inbox , Sent, Drafts, etc.) stores content in two type of files :

  1. MBOX file – stored without file extension - holds the actual email message.
  2. MSF file – stored with MSF extension - holds the index file of given email message.

The idea behind MSF files

MSF are generated for the purpose of importing messages using other applications directly form MBOX folder. MSF format is considered the current standard, and is supported by many popular email clients.

We hope we helped you solve the problem with the MSF file. If you do not know where you can download the application from our list, click on the link (which is the name of the program) - you will find more information there on the location where to download the secure setup version of the required application.

What else may cause problems?

There can be more reasons which determine that you are not able to open the MSF file (apart from the lack of the proper application installed).

First - the MSF file may be incorrectly associated with the application installed to support it. In this case, you need to change this association by yourself. To do this, right-click on the MSF file that you want to edit, click "Open with" and then select the program from the list that you have installed. After this operation, the problems with opening the MSF file should be solved.

Second - the file you want to open can simply be damaged. Then, the best solution is to find a new version of given file, or download it again from the same source as before (maybe for some reason in the previous session the download of the MSF file has not been completed and it cannot be opened properly).

Do you want to help?

If you have additional information about the MSF file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on MSF file.

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