Symptoms
How to disable SmartAction functionality.
Diagnoses
Possible via config modification.
Resolution
You can edit the "Program Files (x86)K2 blackpearlHost ServerBinK2HostServer.exe.config" on your K2 server, changing ' enableListeners="false"' in , and restart the K2 blackpearl service.
This will disable the SmartAction listener on the server. Note that this will strip out SmartAction content from the default task notification, but will not alter a user-customized notification.