message file info
    | position | byte | type | description | 
|---|
    | (1) | 0x0000 |  | "01 00 00 00" | 
    | (2) | 0x0004 | int1 | Source type (0x00 = Newsgroups, 0x01 = IMAP, 0x03 = Local folder) | 
    | (3) | 0x0005 | c-string | Registry key of the account | 
    | (4) | 0x0105 | c-string | Folder name used in 'Outlook Express'. Only valid until the folder is renamed as it stores only the initial name. After renaming it keeps the initial name (however, Folder Info, stored in Folders.dbx file, is updated with the correct name). | 
    | (5) | 0x0210 | int4 | a small value ( 3 or 4 or ...) | 
    | (6) | 0x0214 |  | "01 00 00 00 00 00 00 00 fa 0f 00 00" | 
    | (7) | 0x0220 | int4 | OE session number file last changed | 
    | (8) | 0x0224 | int4 | ??? | 
    | (9) | 0x0348 |  | "01 00 01 00" | 
    |  | Normaly it seems to have the length of 0x0618 bytes. |