I’ve set up a local email server to which OpenHab can send emails in my LAN. Now the real challenge … getting the rule to work 
and befor than, actually understanding how to build the rule. Having read this thread, I think I’m going to have nightmares.
Given that I’ve never built a rule before, where do you recommend I start? I was going to start here but seems to be incomplete? From the above post, it seems like there is a way of building rules and getting syntax check. People also check logs to see if the action is working properly using the “Broadcast” function?