From: "Bob Atkinson" <bobatk(_at_)exchange(_dot_)microsoft(_dot_)com>
...
confidence with which said filter determines a particular message to be
spam, many possible treatments of the message are possible, among them:
* the message is deleted and not presented to the user at all
* the message is moved to a distinguished folder
* the message header is colored grey or purple or orange in
the user's inbox list
* the message is moved to the bottom of the user's inbox
* the message was put into a pending state awaiting the result
of a challenge sent to its originator
* etc.
... (even if your
security policy would allow you to send such bounces).
Just for emphasis...
People with sufficient paranoia to be trusted to run systems connected
to the Internet would refuse to tell mail senders about many of those
actions. We would either lie or be intentionally vague and say nothing
more than "250 2.0.0 Message accepted for delivery."
Vernon Schryver vjs(_at_)rhyolite(_dot_)com
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