Aliens with Apple IIs use their sector editor . In your inbound area if you can grab a copy of the incoming files before your mail processor does.
Specific tips follow.
But first a word about file names. Hubs and other regular callers usually will have made arrangements with you to use an archiver with better compression. Mo0 0069002a.flo is a control file that references the mail bundle. This 0069002a.flo file contains one line. The packets folder is dynamic.