Sometimes, you get an error message in an email that tells you to forward the error to your favorite system administrator. Or maybe you don't have a favorite system administrator, so you forward it to your favorite computer-savvy friend. One way or another, this is a good way to get help, because it preserves the actual error you've gotten, so that someone else has a good shot of knowing what happened, rather than relying on a description of what actually happened.
As a result of my work, I'm in the place of receiving these messages a lot. I get lots of them, with absolutely no actual message from the person forwarding them to me. I think maybe people don't expect a real person to read the messages they send to some random administrator address, but if you don't expect anyone to read it, then I suppose you wouldn't bother sending it.
It's often not very obvious what you're trying to do as a user, except that the error itself indicates you're having trouble. If you ever forward someone a message and don't add notes to the top that indicate why you're forwarding it, please reconsider. From the perspective of someone who reads these, it's rude. And it's difficult not to sound off-putting when I respond asking something along the lines of, "What?"
-N
