Simple Mule Flow using Amazon SQS

sqs-http-async-four.xml

<flow name="sqs-http-async-four" doc:name="sqs-http-async-four" processingStrategy="asynchronous">
        <sqs:receive-messages config-ref="sqs-test-flow-in" doc:name="Receive Message" preserveMessages="true"/>
        <choice doc:name="Choice">
            <when expression="#[message.inboundProperties['ApproximateReceiveCount']&gt;=${sqs.test.default.maxretries}]">
				<logger level="INFO" doc:name="Log Max Retries Exceeded"/>
				<sqs:send-message config-ref="sqs-test-flow-dlq" doc:name="Push to dlq"/>
            </when>
            <otherwise>
                <http:outbound-endpoint exchange-pattern="request-response" host="${http.outbound.host}" port="${http.outbound.port}" path="${http.outbound.path}" method="POST" responseTimeout="${http.timeout}" doc:name="Invoke HTTP Endpoint"/>
                <choice doc:name="Choice">
                    <when expression="#[message.inboundProperties['http.status']=='200']">
                        <logger level="INFO" doc:name="Log Success"/>
                    </when>
                    <otherwise>
                        <logger level="INFO" doc:name="Log Business Error"/>
                        <sqs:send-message config-ref="sqs-test-flow-dlq" doc:name="Push to dlq"/>
                    </otherwise>
                </choice>
            </otherwise>
        </choice>
        <sqs:delete-message config-ref="sqs-test-flow-in" doc:name="Delete Input Message"/>
       	<choice-exception-strategy doc:name="Choice Exception Strategy">
	       	<catch-exception-strategy doc:name="Catch_Exception_Strategy" when="#[exception.causedBy(java.net.SocketTimeoutException)]">
	            <logger message="A timeout exception has occurred: #[message.exception] Message will be retried." level="INFO" doc:name="Log Timeout Exception"/>
	        </catch-exception-strategy>
	        <catch-exception-strategy doc:name="Catch_Exception_Strategy">
	            <logger message="An unhandled exception has occurred: #[message.exception] Pushing message to DLQ." level="INFO" doc:name="Log Exception"/>
	            <sqs:send-message config-ref="sqs-test-flow-dlq" doc:name="Push to dlq"/>
	            <sqs:delete-message config-ref="sqs-test-flow-in" doc:name="Delete Input Message"/>
	        </catch-exception-strategy>
	    </choice-exception-strategy>
    </flow>

awesome stuff Andy. Is there any chance of seeing your config.xml files. i.e. sqs-test-flow-in and sqs-test-flow-dlq. That along with the properties files you have provided is the last piece of the puzzle for me.