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Why bounce/reject is necessary

1997-11-17 15:09:15
The crucial difference between bounce/reject and reply is that the
envelope sender is used.  There are two cases where it is very important
to use that rather than the reply-to/from header:

(1) Change of address.
(2) Rejecting a mailing list which won't unsubscribe you.

In either of these cases a "reply" function is actually the wrong thing to
do, as it would go to the author of the message rather than the mailing
list owner.

So I think bounce/reject is critical functionality in Sieve and is
important independent of reply.

I also think it should use DSN syntax.  I'm looking forward to the day
when MUAs can automatically associate DSNs and MDNs with the messages that
generated them.

                - Chris

P.S. I think it's pointless to argue at what point Sieve is executed.  As
long as we know what objects it operates on, its function is well defined.

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