I have a mirth channel that listens to a source and then deploys the inbound communications to several channels. One of these channels sends the HL7 to an application I am developing, and I do not know where to send my ack message. Should I send it to the inbound port of the original message, or does MIRTH have a specific process for sending acknowledgements?
Acknowledgements in Mirth are handled in destination's Response Transformer. To get there, go to the Destinations tab, select your destination if there are more than one, under Channel Tasks menu on the left side select Edit Response. The msg variable there is your response message. To generate an acknowledgement use Postprocessor script or place your acknowledgement into responseMap directly and configure the Response setting of the Source connector.