send the message on its way.
todo can we do something smart here or through an adapter to handle the situation where we have asked for a message receipt? what about if we're using a message receipt
and we're only a receiver or a sender connection and not a transceiver? We need gateway semantics across two unidirectional SMPPSessions, then
@return the messageId(s) (required if you want to then track itor correlate it with message receipt confirmations)
@throws Exception the{@link SMPPSession#submitShortMessage(String,org.jsmpp.bean.TypeOfNumber,org.jsmpp.bean.NumberingPlanIndicator,String,org.jsmpp.bean.TypeOfNumber,org.jsmpp.bean.NumberingPlanIndicator,String,org.jsmpp.bean.ESMClass,byte,byte,String,String,org.jsmpp.bean.RegisteredDelivery,byte,org.jsmpp.bean.DataCoding,byte,byte[],org.jsmpp.bean.OptionalParameter)}method throws lots of Exceptions, including {@link java.io.IOException}