Because wood and plastic are not good conductors, they just do not work the same way with radio frequency signals. It had only taken me four hours and three text books to validate what I thought I knew by heart. I was quite pleased with my answer. Not too technical, but technical enough to open the door if greater depth is desired. With that, I shipped the answer off.
Email is like first class snail mail.
If the message can not be delivered, the system returns the message to the sender. It has been a week since the answer was sent. The reply did not bounce back, but neither have I received a reply. That's another thing about Email. I guess I will never know.