rem: int idx = mParameterList.findIndex( mParameter ); if ( idx < 1 ) return ErrorButGoOn;
add: KMMessage *receipt = msg->createDeliveryReceipt(); if ( !receipt ) return ErrorButGoOn;
context: KMFilterAction::ReturnCode KMFilterActionFakeDisposition::process(KMMessage* msg) const{  int idx = mParameterList.findIndex( mParameter );  if ( idx < 1 ) return ErrorButGoOn;  if ( idx == 1 ) // ignore    msg->setMDNSentState( KMMsgMDNIgnore );  else // send    sendMDN( msg, mdns[idx-2] ); // skip first two entries: "" and "ignore"  return GoOn;}