FYI, the application APRSIS32 has an explicit control of acknowledgments, and, to some extent, the path, on each message being sent. Look to the lower left in the Message Sending window. I believe the default is to include Ack processing (box checked).
Clayton Coleman W5PFG via AMSAT-BB wrote:
At home, I use UISS. By default UISS does not request acknowledgement or require it. It will only transmit a message or position packet upon pressing the appropriate function key. This helps limit the amount of "rapid-firing" typically employed by many of the folks using transceivers with built-in packet/APRS capabilities.