As far as I know the folder in c:\system\Mail\00001001_S is the incoming folder for sms and mms messages. I see 16 folders in there and probably a couple of more in them again.
My question is: does anyone know the format of the files which are in there? E.g. a file called 00100182 (without extension) - has a binary format and includes sender and receiver phone number - and more ... anyone know how to use these files?