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List:       ipfilter
Subject:    RE: rdr for mail relay server.
From:       Seth <ssscud () yahoo ! com>
Date:       2002-08-31 10:57:38
[Download RAW message or body]

I do the same thing.
Initially sendmail is on the outside as primary mail
relay and exchange is on the inside as a secondary
mail domain (mail2.domain.com). I open port 25 110 to
the sendmail relay  only and config exchange as
internet domain server for "secondary domain" add mx
record and setup users with a secondary domain acct.
So the users addresses are whoever@domain.com not
whoever@secondary.domain.com

I hope this helps
--- Bob Perkins <rnpnj@optonline.net> wrote:
> Why is the name of a firewall getting involved in
> mail delivery at all?
> It would seem that flyingfox shouldn't be trying to
> deliver mail to
> keeper, which is hopefully not acting as a mail
> server as well as a
> firewall.  The solution is to point the alias to 
> whoever@zoe.showshore.com.  This way the confusion
> ends and everyone is 
> happy - the mail servers talk
> to mail servers and the firewall can be a firewall.
> 
> Bob
> 
> At 05:32 PM 8/30/02 -0500, frankg@overland.net
> wrote:
> >Hmm. I don't use Exchange, so I may miss the mark
> on this, but if the
> >problem is that zoe doesn't want to accept mail to
> >whoever@keeper.snowshore.com, the solution would be
> to configure
> >keeper.snowshore.com as a local domain on zoe. That
> way, incoming messages
> >to joeblow@keeper.snowshore.com would wind up in
> joeblow@zoe's mailbox. At
> >least that's what I'd try with Exim :-).
> >
> >Hope that helps,
> >Frank Garcia
> >--
> >System Administrator
> >The Overland Network
> >www.overland.net
> >
> > > No responses to this question yet.  I guess you
> all are thinking it a
> > > pretty novice question.  Maybe I can pull
> someone in still.
> > > As an update I have outbound email working well
> from my
> > > internal mail server out to the Internet.  I
> have also successfully sent
> > > an email to someone that is still receiving
> email on the external mail
> > > server.  What I have not been able to do is send
> email to my new
> > > internal email server.  Here's the scenario. 3
> systems:
> > >
> > > int-mail-server(zoe) -----   firewall(keeper)
> -----  external mail
> > > server(flyingfox)
> > >
> > > I have setup an aliases so that:
> > >
> > > jblow : jblow@keeper.snowshore.com
> > >
> > > Keeper, the firewall, rdr's to zoe internally. 
> I have sniffed packets
> > > on Zoe so I know the SMTP communication is
> happening.  But the problem
> > > now is that the internal mail server, zoe, is
> not liking the idea of
> > > delivering to 'jblow@keeper.snowshore.com'.  It
> doesn't know about
> > > 'keeper.snowshore.com'.
> > >
> > > Any ideas how to fix this?
> > >
> > > -Ed
> > >
> > >
> > > -----Original Message-----
> > > From: owner-ipfilter@coombs.anu.edu.au
> > > [mailto:owner-ipfilter@coombs.anu.edu.au]On
> Behalf Of Ed Sanborn
> > > Sent: Friday, August 30, 2002 9:11 AM
> > > To: ipfilter@coombs.anu.edu.au
> > > Subject: rdr for mail relay server.
> > >
> > >
> > > Hi folks,
> > >
> > >   I am new to the list and ipfilter.  I have
> > > inherited an existing mail server that exists
> outside our
> > > ipfilter-based firewall.  Presently, folks
> connect via POP and
> > > IMAP on our internal LAN through the firewall to
> this external
> > > mail server.  I am planning to install a new
> mail server
> > > (an Exchange server) on the internal LAN.  I
> would like to leave
> > > the external mail server as a store and forward
> mail relayer.
> > >
> > > Two issues:
> > >
> > >   1. How do I go about doing this for one or two
> accounts initially
> > > while leaving
> > > all accounts unaffected?  I am assuming I will
> be utilizing mail aliases
> > > to forward email for these test accounts through
> the firewall and to my
> > > internal mail server.  What are the firewall
> rules that I need to put in
> > > place?  I see alot of discussion in the archive
> about using rdr or
> > > bimap...
> > >
> > >   2. How do I cleanly do this for all
> "@snowshore.com" email after I
> > > have tested
> > > with my test accounts.  How does this, if at
> all, affect the firewall
> > > rules?
> > >
> > > Thanks in advance,
> > >
> > >   -Ed
> > >
> > > Ed Sanborn   (978) 367-8478
> > > Principal Network Administrator
> > > SnowShore Networks
> > > 285 Billerica Rd.
> > > Chelmsford, MA. 01824
> 
> 


=====
SRR

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