.MSF File

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.

An msf file extension is associated with the Mozilla Thunderbird, an e-mail client for Windows, Mac and Linux. An msf file contains mail summary data.

How to open:

The *.msf file is used by Thunderbird for internal purposes.

How to convert:

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