Migrating from MAC to Windows Both versions of Eudora keep their mailboxes in the same format (UNIX mbox). However, Macintosh and Windows file systems handle text differently, so line feed conversion must be done. You can do this by FTPing the files in ASCII (text) mode, or by using a carriage return/line feed conversion utility (like the shareware application CRLF). It's very important that you FTP or convert the files to take care of the carriage return/line feed processing.