Re: Devils advocate.
"My viewpoint is that there's no reason for the admin to be reading those emails in the first place - just bounce them. I'm guessing he set this up as a way of snooping, rather than to be helpful"
Actually I believe in the article he said that often customers emails would be mis-addressed and he was attempting to forward them to the appropriate recipient. Sounds like a reasonable thing to do for the business.
It just happened that some internal mails were also mis-addressed.