mx_record
BObjectList<mx_record, true> mxList(5);
mx_record *mxRec = mxList.ItemAt(0);
BObjectList<mx_record, true>* mxList, bigtime_t timeout)
mx_record* mxRec = new mx_record;
DNSQuery::_ReadMXRecord(BRawNetBuffer& buffer, mx_record* mxRecord)
BObjectList<mx_record, true>* mxList,
mx_record* mxRecord);