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- Maybe in reply to: Christian Kratzer: "Re: Delivered-To or Envelope-To header ..."
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From: Phil Chambers (no email)
Date: Tue Jan 02 2007 - 12:12:09 EST
On Tue, 2 Jan 2007 12:00:16 +0100 (CET) Christian Kratzer <>
wrote:
> On Fri, 29 Dec 2006, Phil Chambers wrote:
>
> >
> > On Tue, 26 Dec 2006 17:17:49 -0400 "Marc G. Fournier" <> wrote:
> >
> >> -----BEGIN PGP SIGNED MESSAGE-----
> >> Hash: SHA1
> >>
> >>
> >> Is it possible to add this where delivery method is lmtp? I have one person
> >> requesting it, and am not finding anything particularly useful on the subject
> >> ...
> >>
> >> Mainly, what they are looking at is where UserA is aliased to UserB, but they
> >> want to know that the original was sent to UserA for 'sub-filtering' purposes
> >> ...
> >>
> >> I'm using Postfix in front of cyrus imapd .. and v2.3.x of Cyrus IMAPd ...
> >>
> >
> > If a message has been delivered to B because A is in the To: or Cc: then you
> > don't need any extra header lines because you can see it in the To: and Cc:.
>
> a message is delivery solely by what is in the envelope. The headers
> are irrelevant to mail routing.
I never claimed otherwise! Marc was talking about adding a header for a filter
to use. I was pointing out that the information was already in the header in a
particular case.
>
> > If the message was delivered to multiple recipients because of Bcc: or because
> > of a list (Postfix can't tell the difference) then you are snookered as far as
> > I can see.
>
> of course postfix can tell the difference. It has the envelope
> information. If it did not have the envelope data it could not
> deliver the message anywhere.
You missed my point! Postfix cannot tell whether it received a message because
of earlier expansion of a list or because of a Bcc: recipient. My point was
that you would not want to have a header which disclosed all recipients because
that would break the Bcc: privacy.
I agree that the alternative of producing seperate copies for each individual
user does not seem like a desirable solution either.
Phil.
---------------------------------------
Phil Chambers ()
University of Exeter
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