From: Alex van den Bogaerdt (alexergens.op.het.net)
Date: Wed Apr 23 2003 - 16:39:07 CDT

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On Wed, Apr 23, 2003 at 09:50:51PM +0200, Andreas Meyer wrote:

> Bear with me! I learned a lot the past year regarding mail-systems
> and it was a challenge and pleasure to do this with postfix. But the
> difference between bouce- and reject-messages is not that clear to me.

Risking to be flamed but alas:

Bounce:
"I do not accept your message; I do not want to become responsible for it"

You reject the message before it enters your server, you usually do so at
the "rcpt to: " stage.

The sending server (so: the remote one from your point of view) has to
inform the sender. It got a "554 I do not accept this message" response.

Reject-message:
"I took responsibility for the message but cannot deliver it because" ...

You accept the message; then process it, find something bad (such as a
virus, spam, bad language, whatever) and send a message back to the
sender saying "I did not deliver this message".

If anyone disagrees or wants to make some adjustments, please do respond!

HTH
Alex
--
Much of what looks like rudeness in hacker circles is not intended to give
offence. Rather, it's the product of the direct, cut-through-the-bullshit
communications style that is natural to people who are more concerned about
solving problems than making others feel warm and fuzzy.

http://www.tuxedo.org/~esr/faqs/smart-questions.html

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