> The final mystery is solved. My MMS client works with > Vodafone D2 in Germany. It turned out, that the WAP gateway > did not know about the binary encoding for > "application/vnd.wap.mms-message". >
This is an WSP version issue, right ? Binary encoding for application/vnd.wap.mms-message is only specified for WSP 1.4 and higher. So if your WAP gateway indicates that it supports WSP 1.3 or lower, then its correct to reject the WSP PDU. Did you have to make your client WSP version aware ?
