On 29 Dec 1998, Russell Nelson wrote:
> o Bounce message bounces because sender domain not in DNS.
> o email has been misdelivered to unrelated third party.
> o This is a total privacy breach, an email disaster.
Well, the "unrelated third party" is the postmaster alias at the qmail
site. Whoever controls the .qmail and control files can already forward
copies of the mail passing through the system anywhere they want, so this
is no more of a privacy breech than sending unencrypted mail through
untrusted third-party systems is in the first place.