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
  • 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

  • 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


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    MarkDissington
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  • 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.