I got your PM of the same question. I don't mind PM but please send a link to your post here. The idea of the forum is for everyone to discuss and learn.
Regarding your question. "GE historian" isn't useful, GE have used many different version of historians and none of them are able to send out email notification except for the PI historian but that isn't really a GE product but GE does bundle it with their Turbine DCS system. So, please be specific on what product and version.