Kjetil Torgrim Homme wrote: > 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.
QED. > >> 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: > > [EMAIL PROTECTED] sends e-mail to [EMAIL PROTECTED] this is a list > run the old-skool way, in aliases it looks like: > > discuss: :include:/etc/lists/discuss > discuss-request: [EMAIL PROTECTED], [EMAIL PROTECTED] > owner-discuss: discuss-request > > when two.example receives the message, it rewrites the envelope header > to be [EMAIL PROTECTED] one of the members of the list is > [EMAIL PROTECTED] 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. > Kjetl, OK 'example' it is. But I think we two are going 'round in increasingly off-topic circles by now. 'Old school' as you put it, alias expansion - MLM or other - can indeed screw several breeds of pooch - rewriting or not. But this need not be a dominant factor w/r choosing how best to handle multiple-recipient bounces. Better to fix the problematic aliasing than forego a useful problem-solver. Anyway - the thread started with DNS list lookup defer questions, so I'm going away now..... Best, Bill -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
