On Tue, 2007-05-15 at 22:39 +0800, W B Hacker wrote:
> Kjetil Torgrim Homme wrote:
> > I'm explaining that you can not reject bounces
> > to multiple recipients *in general*.
>
> I don't see why not.
>
> MLM's having been covered,
yes, that was my example.
> how often does your server transmit the same message
> with an envelope-from or sender that lists *multiple* local addresses as the source?
source routing is a SHOULD NOT in RFC 2821, so this is not generally
possible.
> So where would a *legitimate* bounce *get* the 'extra' senders to turn into
> multiple recipients on the bounce going back to you?
let me try with an example going into more detail:
edgar@??? sends e-mail to discuss@???. this is a list
run the old-skool way, in aliases it looks like:
discuss: :include:/etc/lists/discuss
discuss-request: alice@???, bob@???
owner-discuss: discuss-request
when two.example receives the message, it rewrites the envelope header
to be owner-discuss@???. one of the members of the list is
charlie@???. unfortunately, e-mail to charlie bounces, so
two.example will send a bounce to the sender, which is now
owner-discuss. this expands to alice and bob, and is delivered as a
single bounce to those two recipients from two.example to three.example.
--
Kjetil T.
