MSF File Documentation

Overview

Feature Value
Format Name Mail Summary File
File Extension .msf
Developed By Mozilla Foundation
File Type Index File
Primary Association Email Clients (e.g., Thunderbird)
Data Format Mork Database Format
Text Encoding UTF-8
Purpose Summarizing and Indexing Emails
Location [Profile Directory]/Mail/.../*.msf
Editable No (not directly by users)
MIME Type application/vnd.mozilla.mork
Encryption Supported by Email Client
Compression No
Linked to Specific Email Account Yes
Automatically Generated Yes
Manual Creation No
Used for Backup No (but related emails can be)
Usability outside Thunderbird Limited
Requirement for Email Loading Not required but improves performance
Rebuildable Yes, by the email client if deleted