My current and former Principals have as part of there email signature...
"I am sending this communication at a time that suits me. I understand that this may not be during standard working hours and do not expect that you answer until standard business hours." And they actually reply with a light slap on the wrist if you do respond out of hours
The boss was very apologetic when in the last week of the just concluded school holidays (NSW Australia) he sent out an all hands email with information on the new Wuflu restrictions at school.
Biting the hand that feeds IT
