MSF File

What are MSF files and how to open them

Are you having problems opening a MSF file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a MSF file?

MSF files have multiple uses, and Mozilla Mail Summary is one of them. Read more about the other uses further down the page.

Mozilla Mail Summary File

Files that contain the .msf file extension normally hold an index of mail messages that have been created by a variety of different email applications.

The files do not contain the actual email contents sent or received by the user. Instead, they only contain an index of the emails with the mail headers and text summaries.

How to open MSF files

Important: Different programs may use files with the MSF file extension for different purposes, so unless you are sure which format your MSF file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested ten different MSF openers which you will find listed below.

Last updated: February 24, 2023

All known file formats using extension .MSF

While Mozilla Mail Summary File is a popular type of MSF-file, we know of 2 different uses of the .MSF file extension. Different software may use files with the same extension for different types of data.

Amino/Nucleic Acid Multiple Sequence File

We know that one MSF format is Amino/Nucleic Acid Multiple Sequence File. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

MSF opener for Windows

We have identified 2 MSF openers that are compatible with this specific type of MSF file.

Various apps that use files with this extension

These apps are known to open certain types of MSF files. Remember, different programs may use MSF files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about MSF file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.