No and yes. In general NO this is not possible due to a ...
By Thomas Schulte 2 decades ago
restriction build in by IBM. The time that is allowed as a minimum for agents to repeat is 5 Minutes and this is build into the system.
Yes if you chose to do it another way. I tried this once and it worked in a test for me. You could use TriggerHappy to watch the event and start the dispatcher agent each time the event occurs or you could change the agents properties from every 5 minutes to after new mail arrives (i did not test this ever so if it does not work don't put the blame on me).
Thomas