I'd recommend looking at the configuration files to see what you have set up:
In the plist you can turn the debug on, and then check the apropriate logs at
2) Alternatively you can run
sudo fs_usage emond to take a look at just what files emond is accessing in real time.
3) If you want to disable emond to see what breaks when you turn it off run
sudo launchctl unload /System/Library/LaunchDaemons/com.apple.emond.plist
Oddly the best documentation I've ever seen on emond is on a thread at discussions.apple.com from late 2007 to do with Leopard Server.