messageSendTransactional

<soapenv:Envelope 
    xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
    xmlns:ecm="http://ecircle.com/developer/ecmapi">
   <soapenv:Header/>
   <soapenv:Body>
      <ecm:messageSendTransactional>
         <messageId>2</messageId>
         <externalTransactionFormula>transactionalID</externalTransactionFormula>
         <recipientId>7</recipientId>
         <additionalContent><!--Zero or more repetitions:-->
           <parameters>
               <name>subject</name>
               <value>This is subject</value>
             </parameters>
         </additionalContent>
      </ecm:messageSendTransactional>
   </soapenv:Body>
</soapenv:Envelope>