Integrate the freeware SpamAssassin spam-filtering software with Lotus Notes / Domino
configuration:
You'll need to isolate whether the problem is with the SpamAssassin Integration agent, or with the external SpamAssassin programs. Try running the SpamAssassin programs to do the same thing from the command line to see if you can reproduce the problem. If an "before mail arrives" agent hangs the Router task should automatically kill it after a while based on the time limit set in the Configuration document.