MSF file extension

Mozilla Thunderbird Mail Summary File

Related .MSF software

Windows

Mozilla Thunderbird

The .msf extension (Mail Summary File) is used by Mozilla's Thunderbird email client. Thunderbird stores the user's mail in two files, one without an extension (E.g Inbox) which holds the actual mail messages in the standard 'mbox' format and the other with an .msf extension (E.g Inbox.msf) which holds an index of the mail.

These files can be found in the following locations:

Windows Vista
C:\users\[User Name]\AppData\Roaming\Thunderbird\Profiles\

Windows XP/2000
C:\Documents and Settings\[User Name]\Application Data\Thunderbird\Profiles\

Windows 95/98/ME
C:\WINDOWS\Application Data\Mozilla\Thunderbird\Profiles\xxxxxxxx.default\

To convert Thunderbird emails (mbox format) to eml files (used by Microsoft Outlook and Microsoft's Outlook Express), you will need a tool such as IMAPSize.

Click here to run a FREE scan for .MSF related errors

Other .MSF file extensions

.MSF - Netscape Mail Summary File

Other information

Author:	Mozilla
File Type:	?

.MSF format - Technical information

Identifying Characters (ASCII):
Identifying Characters (Hex):
Program registry ID:
.MSF MIME Type:

.MSF extension links

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Visitor comments

tonybaker33 _at_ hotmail.

2007-05-05 11:58:13

Thanks for the information. Can I use these files on my mac?

Franz

2007-07-10 17:05:02

I like ordering my messages by thread. Occasionally I'd like to add a message to a thread or merge two threads. I thought the easiest way would be tweaking the .msf file, but I can't find any useful info and reverse engineering the format seems too time-consuming an effort. Any suggestions? Thanks.

Silversleeves

2008-07-21 14:00:41

tonybaker33_at_hotmail:

Yes. In fact, what the above information does not include is any mention of the fact that Thunderbird Mac also creates .msf files as well as the no-extension "box" files
(i.e.: "JunkMail", no quotes).

I just brought one of my .msf files over from the boot drive of a G4 (Dual 1.25Ghz 80/40/1GB RAM, OS X 10.3.x) on which I was using T'bird almost exclusively [occasionally Mozilla Mail, but not often]. So there's your proof. As for using a Windows-created .msf in Mac OS X's build of T'bird, I'd say it's worth a shot.

Silversleeves
Refugee from the 'Elegant OS'

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