Being found that Sony Ericsson(T68i) support a mechanism called Limited distribution to limit any object recieved in an mms, from being forwarded from the phone.
Limited distribution is a part of the MMS header for that object. The content type is defined as belows:
Header field name:X-Mms-ericsson-Protected
Header field value: same values as from the Content-Type header
The phone will recognise the indication, disabling the object from being used in outgoing messages. With the set of Java library download from the forum.nokia, please indicate which part of the code can be changed to add the above header information in (e.g. encoder??)?