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?
You must be talking about S60 device and the inbox storage. Do NOT touch those files. All the files are part of the database system of the device inbox. By modifying/deleting some of those files you will corrupt the database index and there is no tools to recover the database structure.
Symbian SDK has a well documented API's for handling the items in the device inbox, use those.
actually, I need info on how to read received MMS from my mobile. I'd like to check the incoming folder, read text and image files and send them via Bluetooth to some machine near. Without any user interaction that is!