There are 6 other file types using
the MSF file extension!

msf file icon.msf - Epson file

msf file icon.msf - Quanta MSF chemical modeller input file

msf file icon.msf - Multiple sequence file

msf file icon.msf - Miranda IM skin settings file

msf file icon.msf - Sony file

msf file icon.msf - Altera Mask settings

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MSF file extension - Mozilla Thunderbird mail summary

What is msf file? How to open msf files?

File type specification:

Email related data file type icon Email related data file type

The msf file extension is associated with Mozila Thunderbird. Thunderbird's mail files are in the standard plain text "mbox" format, which almost all mail programs can use or import.

Many proprietary mail programs have a function to import from Eudora, which also uses the "mbox" format; this function should read your Mozilla mail files properly.

Your mail files are inside your profile (see the Profile Folder), in the Mail and (if you use IMAP) ImapMail folders.

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 file extension (e.g. INBOX.msf), which is the index (Mail Summary File) to the mail file. Tell the other program to import mail from the file with no extension.

The default software associated to msf file type:

Mozilla Thunderbird icon

Mozilla Corporation logo Mozilla Thunderbird  Microsoft Windows software

Company or developer:
  Mozilla Corporation

Mozilla Thunderbird is easy to use e-mail client with spam protection and e-mail managing features.

Help how to open MSF files:

The msf file is used by Thunderbird for internal purposes.

How to convert file with extension MSF:

The smf mail summary files cannot be converted to other file formats.

File identification strings:

HEX code: 2F 2F 20 3C 21 2D 2D 20 3C 6D 64 62 3A 6D 6F 72 6B
ASCII code: // !-- mdb:mork:z

List of recommended software applications associated to the .msf file extension

Recommended software programs are sorted by OS platform (Windows, Mac OS X etc.) and possible program actions
that can be done with the file
: like open msf file, edit msf file, convert msf file, view msf file, play msf file etc. (if exist software for corresponding action in File-Extensions.org's database).

  • Others msf file

Unspecified and all other actions for computer programs working with msf file - Mozilla Thunderbird mail summary

Click on the software link(s) for more information. Suggested software applications use msf file type for internal purposes and/or also by different way than common edit or open msf file actions.

Microsoft Windows:

Apple macOS / Mac OS X:

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