Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!umich!samsung!zaphod.mps.ohio-state.edu!usc!apple!bionet!arisia!roo!Xerox.COM!Lennart_Lovstrand.EuroPARC
From: Lennart_Lovstrand.EuroPARC@Xerox.COM
Newsgroups: comp.mail.sendmail
Subject: Re: Need to fake return machine address
Message-ID: <315@roo.UUCP>
Date: 25 May 90 13:42:23 GMT
References: <1990May21.181455.22689@mozart.amd.com> <106@tdatirv.UUCP>
Sender: news@parc.xerox.com
Organization: Rank Xerox EuroPARC, Cambridge, UK.
Lines: 65

In article <106@tdatirv.UUCP> swf@tdatirv.UUCP writes:
>In article <1990May21.181455.22689@mozart.amd.com> mikel@mozart.amd.com
>(Michael W. Wellman) writes:
>>  I've several machines which are used interactively
>>and we wish to have all mail sent only to one machine.  So, assuming that
>>foo is the mail machine, if user@bar sends mail to user1, I want:
> 
>>1)  the mail to be routed automatically to user1@foo
>>2)  the return addresses to be configured so that the return address shows
>>    up as user@foo.
>>
>	I would also be interested in this.  We have a very similar situation
>here. And it makes for some real difficulties with external mail.

Hi, maybe this helps.  The configuration file in the IDA Sendmail Kit has
had this feature for a long time in two forms:

The general version uses a separate "GENERICFROM" database that maps
arbitrary physical addresses (even non-local) to logical addresses for all
header senders.  The database is in turn derived from an extended form of
the aliases database (called xaliases).  For example, an entry like:

	lel@ida, lenlo@ida, Lennart.Lovstrand@ida:
		<> L-LOVSTRAND@LISBET, < lel@obelix, < LENNART@HAZEL, <> lenlo

would mean that any mail coming from either of L-LOVSTRAND@LISBET,
lel@obelix, LENNART@HAZEL, or lenlo on the local host will be rewritten
to have a sender of lel@ida.liu.se.  (Conversely, any mail to lel@ida,
lenlo@ida, or Lennart.Lovstrand@ida will be delivered to L-LOVSTRAND@LISBET
and lenlo on the local host.)

While this feature relies on IDA's generic DBM support, you may be able to
use Sun's YP macros as a substitute.

The simpler version defines a set of hosts which are to be hidden behind
the mailer's hostname.  Any sender address coming from a user on one of
these hosts will be rewritten as user@$j.

The recipe for this goes somewhat like this:

FH/etc/hosts.equiv		(or whatever file you want to use)

S5				(or S1 on non-IDA Sendmails)
...
# Hide these nodes using our own name
R$+@$=H			$: $1@$j
...

All of the above substitutions are performed in ruleset 5 in IDA Sendmail,
which is the header sender specific ruleset.  In a normal sendmail, it
would have to go into ruleset 1, which serves both envelope and header senders.

--------

On the side, I really wish people wouldn't set "Distribution: usa" on
issues that aren't specifically limited to the US.  I generally hate
receiving mail or news related to someone wanting to sell their car in some
remote part of the world, but I also dislike being cut off from an
interesting information flow for no particular reason.  Please let's try
and keep distributions to be meaningful.

Cheers,
--
--Lennart <Lovstrand.EuroPARC@Xerox.COM>
Rank Xerox EuroPARC, 61 Regent St, Cambridge, CB2 1AB, England