The subject for the e-mail sent when bringing a node back online (after marking it as temporarily offline) is misleading. It is currently:

"Computer [NAME] marked temporarily online"

This should not imply that it will only be online temporarily, but that it is no longer offline. I would suggest something like:

"Computer [NAME] marked online (was temporarily offline)"

Alternatively, an option to set the e-mail subject and content globally as well as per node would be great.