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Thread: Multiple domains with multiple SMTP points of presence

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  1. #1
    Join Date
    Dec 2007
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    Default Multiple domains with multiple SMTP points of presence

    We're planning a Zimbra deployment for a client and they made an unusual request: being able to route outgoing mail differently according to the "From" address used.

    Let me explain.

    This company have two geographically assigned domains: and; and mail sent to is received through a mail gateway located in Quebec while mail sent to passes through a mail gateway located in Ontario. These SMTP gateways are not Zimbra boxes. This is done with the magic of DNS MX records.

    Once the messages are inside our client's network, they are all routed to the Zimbra server. Also, mail sent to gets to the same mailbox as a message sent to So far so good.

    When users send emails to the external world, all outgoing messages go through the Quebec SMTP gateway, whether they're using the or "From" or "Reply-To" address.

    Our client wants to have mail sent using to get through the Quebec gateway and reach the Internet from there while mail using be routed through the Ontario SMTP gateway and reach the Internet from an Ontario based IP address.

    Is it possible to build this kind of setup with Zimbra? (We're willing to work at a lower level and tweak Postfix if necessary.)

  2. #2
    Join Date
    Mar 2006
    Beaucaire, France
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    Too quick post 8-(

  3. #3
    Join Date
    Dec 2007
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    Just in case someone has a new idea.

    The mentionned request is autentic and an issue for this client. Not a show-stopper, but almost.

  4. #4
    Join Date
    Jan 2008
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    It is hard to picture in my head what you are trying to do - but one potential solution might be views in bind - O'Reilly -- Views in BIND 9

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