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MarkDissington Outstanding Contributor.
Outstanding Contributor.
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Internet 'split' Domain question

Our parent company would like us to start using the same internet domain as they do, even though we have completely separate network infrastructures. At first I thought this was impossible but thinking about how mail/spam filtering works I'm wondering if it could be achieved.

So what I'm thinking is that the required domain - let's call it abcd.com for now - points to their mail server (I believe this is some version of Exchange).

Q1: Can Exchange have a list of specific mailboxes that it re-delivers to another host? A bit like a sendmail alias list?

Assuming Exchange can take our list of users and redirect the mail to us, we then add the abcd.com domain to our accepted domains, make it the default and everything gets should now route in via the abcd.com parent companies Exchange server.
We now set the abcd.com Exchange server as the SMARTHOST/ default route for all mail.

Q2: can we configure GroupWise to send emails to the smarthost for the same domain it is configured as its own if the user does not exist? There will obviously be some xxx@abcd.com users in Exchange and some xxx@abcd.com users in GroupWise, anyone GW doesn't know about should be routed back to the parent Domain/Smarthost.

If anyone has other experiences like this please share, would hate to be forced off GW to an Exchange server

TiA,
Mark
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3 Replies
Knowledge Partner
Knowledge Partner

Re: Internet 'split' Domain question

Hi.

I can't answer the Exchange specific questions, but...

On 30.01.2015 13:16, MarkDissington wrote:
>
> Q2: can we configure GroupWise to send emails to the smarthost for the
> same domain it is configured as its own if the user does not exist?


It actually does that by default. All mails sent to *ANY* address that
isn't a groupwise internal email address goes out the GWIA, and gets
handled there like any other mail. If the MX record of abcd,com points
to the exchange server, a mail to unknowningroupwise@abcd.com will
automatically go there, without you needing to do anything.

CU,
--
Massimo Rosen
Novell Knowledge Partner
No emails please!
http://www.cfc-it.de
CU,
--
Massimo Rosen
Micro Focus Knowledge Partner
No emails please!
http://www.cfc-it.de
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mblackham Absent Member.
Absent Member.

Re: Internet 'split' Domain question


Q1,- This is very possible. In Exchange (assuming Exchange 2010 or 2013), You need to change the abcd.com Accepted Domain defintion to an Internal Relay Domain, then create a new Send Connector to relay to your GWIA.



Details can be found here for Exchange 2010: https://technet.microsoft.com/en-us/library/bb676395.aspx



--Morris



>>> MarkDissington<MarkDissington@no-mx.forums.novell.com> 1/30/2015 5:16 AM >>>




Our parent company would like us to start using the same internet domain
as they do, even though we have completely separate network
infrastructures. At first I thought this was impossible but thinking
about how mail/spam filtering works I'm wondering if it -could- be
achieved.

So what I'm thinking is that the required domain - let's call it
abcd.com for now - points to their mail server (I believe this is some
version of Exchange).

Q1: Can Exchange have a list of specific mailboxes that it re-delivers
to another host? A bit like a sendmail alias list?

Assuming Exchange can take our list of users and redirect the mail to
us, we then add the abcd.com domain to our accepted domains, make it the
default and everything gets should now route in via the abcd.com parent
companies Exchange server.
We now set the abcd.com Exchange server as the SMARTHOST/ default route
for all mail.

Q2: can we configure GroupWise to send emails to the smarthost for the
same domain it is configured as its own if the user does not exist?
There will obviously be some xxx@abcd.com users in Exchange and some
xxx@abcd.com users in GroupWise, anyone GW doesn't know about should be
routed back to the parent Domain/Smarthost.

If anyone has other experiences like this please share, would hate to be
forced off GW to an Exchange server

TiA,
Mark


--
MarkDissington
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MarkDissington Outstanding Contributor.
Outstanding Contributor.

Re: Internet 'split' Domain question

Thanks guys,

I have tried the "sending to unknown address" and it does send out via the gwia to our relay host.

Thanks for the pointers on Exchange I will make sure that is passed over to our parent company's Exchange people when I meet with them.

BR,
Mark.
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