File Extension MSF

.MSF File

File extension: MSF
File type: Mail Summary File
Do you have MSF - related issues?
First check your registry for hidden errors.


Notes about the MSF file extension:



Errors in your registry are one of the common causes for incorrect file associations on your windows system. It is highly recommended that you check your registry for file association errors (will also check for any other registry errors).

The MSF file type is primarily associated with 'Thunderbird' by Mozilla Corporation.

Thunderbird is the Mozilla mail client. It comes in multiple languages and versions for multiple operating systems (Windows, OS X, Linux).

Each mail folder (Inbox, Sent, etc.) is stored as two files; one with no extension (e.g. INBOX), which is the mail file itself (in ‘mbox’ format), and one with an .MSF extension (e.g. INBOX.MSF), which is the index (Mail Summary File) to the mail file. If importing to another program, tell the other program to import mail from the file with no extension.

Detailed information for file extension MSF:


Primary association: Thunderbird
Company: Mozilla Corporation
Identifying characters Hex: 2F 2F 20 3C 21 2D 2D 20 3C 6D 64 62 3A 6D 6F 72 6B 3A 7A 20 , ASCII: // !-- mdb:mork:z

Other applications associated with file type MSF:

  • EarthLink (E-mail Message File) by EarthLink, Inc.Paired with .MIF file as its index.
  • Multiple Sequence File(biomedical analysis)
  • Netscape Mail (Mail Summary File) by NetscapeEach mail folder (Inbox, Sent, etc.) is stored as two files; one with no extension (e.g. INBOX), which is the mail file itself (in ‘mbox’ format), and one with an .MSF extension (e.g. INBOX.MSF), which is the index (Mail Summary File) to the mail file. If importing to another program, tell the other program to import mail from the file with no extension. The identifying characters used for this association are - Hex: 2F 2F 20 3C 21 2D 2D 20 3C 6D 64 62 3A 6D 6F 72 6B 3A 7A 20 , ASCII: //..!--..mdb:mork:z
File Identifier - TrID
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database




Important: When encountering any file extension issues it is always recommended that you run a free scan for Windows registry errors.

Technical data

To view technical data on file-extension MSF click this link to expand/hide the additional area.

System Info for File Extension .MSF

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly from user systems.

ProgramID: Memory Stick Document File

ProgramID: msffile
EXEFile: blank

ProgramID: SQLServer.Replication.Datafile
EXEFile: rundll32 %ProgramFiles%\MICROS~4\80\COM\replsync.dll,DllAddSubscription -SubscriberDatabasePath %1

ProgramID: SQLServer.Replication.Datafile
EXEFile: rundll32 %ProgramFiles%\MI6841~1\80\COM\replsync.dll,DllAddSubscription -SubscriberDatabasePath %1

ProgramID: SQLServer.Replication.Datafile
EXEFile: rundll32 %ProgramFiles%\MICROS~2\80\COM\replsync.dll,DllAddSubscription -SubscriberDatabasePath %1

ProgramID: SQLServer.Replication.Datafile
EXEFile: rundll32 %ProgramFiles%\MICROS~3\80\COM\replsync.dll,DllAddSubscription -SubscriberDatabasePath %1

ProgramID: msffile
EXEFile: %ProgramFiles%\PianitoStudio\PianitoStudio.exe /open %1

ProgramID: msffile
EXEFile: C:\DOCUME~1\Michael\LOCALS~1\Temp\Temporary Directory 2 for pianitostudio[1].zip\PianitoStudio.exe /open %1

Program Name and MIME Type Info for File Extension .MSF

FILExt has been given permission to display a Program Name/MIME type database collected by Anthony R. Nemmer. Some of this data has already been included into the main FILExt database. Those entries which have not yet been incorporated are displayed below.
Program Name Mime Type application/multiple_sequence application/vnd.epson.msf application/x-moderation-plugin

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Did you know

Everytime you install & uninstall software and modify system components your Windows registry is left fragmented with obsolete, corrupted and harmful files.

We recommend you run a free registry scan to identify the issues causing problems on your PC:


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