rs is telling me that all my boxes and my parents' have not been seen for 14 hours (which is the time period I set). It did it some time last week and it's busy doing it again. The fact it complains about my parents' boxes which are in a different county says to me there's something up with the server. Either that or the package needs an update on all of them, it'll be one I updated in the summer.
Hard to tell since rs doesn't start thinking about sending the emails again until it has successfully connected to the box. I've just logged in to rs and it claims to have contacted all the boxes last night.