This position is laughable to pretty much anyone with common sense, and yet there are a good number of large companies that would support his position in court,

This position is laughable to pretty much anyone with common sense, and yet there are a good number of large companies that would support his position in court, if only because they'd really like that "If you are not the intended recipient of this message, please notify the sender immediately, and delete the message and any attachments." tagline in emails to be proven legally-binding in court.