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From: michi@ptcburp.ptcbu.oz.au (Michael Henning)
Newsgroups: comp.mail.sendmail
Subject: Re: Sendmail not rewriting my "Cc" field
Keywords: Cc
Message-ID: <353@ptcburp.ptcbu.oz.au>
Date: 19 Mar 91 00:00:33 GMT
References: <1991Mar17.233843.21794@cs.umn.edu>
Organization: Pyramid Technology Corporation
Lines: 61

iacovou@cs.umn.edu (Danny Iacovou) writes:


>    Hello;

>    I am having a bit of a problem with sendmail (5.61).  When sending 
>    mail from machine A, to a user at machine B (machine B is not in
>    the same domain as machine A), and Cc'ing user at machine C 
>    (machine C is in the same domain as machine A), the address of
>    machine C is not expanded when it reaches machine B. For example:


Interesting... I don't know how to solve the problem, but it seems that
it is more complicated than one is inclined to think.
To be specific, suppose my machine is "mymachine.dom", and I mail a user "x"
at "hismachine.dom", with a carbon copy to a user "local" on mymachine,
the Cc: line when the mail gets to "x@hismachine.dom" should look like

	Cc: local@mymachine.dom

However, things get more complicated with mixed addresses. Suppose
I have two Cc recipients, one on the Internet, and one on the other side
of a uucp link from "mymachine" to "uucphost", what should the
Cc: line in the mail for "x@hismachine.dom" look like ?

That is, how should a mail item sent from me@mymachine.dom to x@hismachine.dom
with Cc: as below appear at x's end ?

	Recipient:     x@hismachine.dom
	Carbon copies: local, uucphost!uucpuser

When user x gets this, one possibility is to rewrite the Cc: line to:

	Cc: local@mymachine.dom, uucphost!uucpuser@mymachine.dom

or possibly:

	Cc: local@mymachine.dom, uucpuser%uucphost@mymachine.dom

Worse, what should the headers look like when the mail gets to uucpuser ?
One thing I can think of is:

	From: mymachine!me
	To: uucphost!uucpuser
	Cc: mymachine!local, mymachine!x%hismachine.dom

Does anyone know whether there is a standard way of dealing with this ?
It seems to me that the Cc: address really needs to be rewritten twice,
once as a To: address to be given to the transport mechanism, and once as
a From: address, to be placed in the Cc: header of the recipient.
Is it possible to teach sendmail (5.61) to deal with this, or is it just not
worth the bother ?

I would really appreciate any help with this...

						Michi.
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