Attention corporate mail server admins. The users of my cluster rely on email to let them know of job errors and other anomalous conditions - "no news is good news" is the rule. If you feel that there's too much mail coming from the cluster, please contact me. Do not, under any circumstances, block random nodes without telling anyone. It is particularly evil to just block some nodes and leave others alone, so we still get some emails, and think things are operating as usual.