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Outgoing relay problem on exchange 2003

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  • Outgoing relay problem on exchange 2003

    Hi,
    I have a setup installed Exchange and AD installed in the same machine.There are two NIC's, One connected with PUBLIC network and Public ip's and another one connected with our LAN.

    Heres problem i can able receive all the mails from internally and externally.But i cant able to send mails from exchange server.It was some errors showing 550 unable to relay. Can we use Public IP and Local IP on the same system, if so do we need to use any relay options?
    Please let us know.

    Thanks.
    Pete
    MCSE (2003 server : Active Directory, Security), MCSA,MCTS, MCP

  • #2
    Re: Outgoing relay problem on exchange 2003

    Dual homed Exchange servers are a pain, and I would not recommend them. Windows makes a very poor router. Is there any reason you aren't using it in a flat single connection and having a router do the work?

    You do not have to set any relay options if you are using native MAPI clients (so Outlook connected via MAPI, OWA, EAS, OMA). Cannot relay normally means the server doesn't recognise the domain. If you are getting it on sending email and are NOT using SMTP to send email form the client to the server (Outlook Express for example) then the problem is likely to be with the next hop.

    Not really enough information to say exactly what the problem is.

    Simon.
    --
    Simon Butler
    Exchange MVP

    Blog: http://blog.sembee.co.uk/
    More Exchange Content: http://exchange.sembee.info/
    Exchange Resources List: http://exbpa.com/
    In the UK? Hire me: http://www.sembee.co.uk/

    Sembee is a registered trademark, used here with permission.

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    • #3
      Re: Outgoing relay problem on exchange 2003

      Hi Simon,

      Just let me know, Could i use public and local IP's in the same exchange system using two NIC's? Will it work without any NAT or Router?

      Thanks.
      Pete
      MCSE (2003 server : Active Directory, Security), MCSA,MCTS, MCP

      Comment


      • #4
        Re: Outgoing relay problem on exchange 2003

        Originally posted by pete007 View Post
        Hi Simon,

        Just let me know, Could i use public and local IP's in the same exchange system using two NIC's? Will it work without any NAT or Router?

        Thanks.
        You could, but I wouldn't recommend it. I never dual home Exchange servers, I find that it causes headaches with the configuration. It also means a domain machine is exposed directly to the Internet without the protection of a router. While I have no problems exposing port 25, I don't really like the idea of a domain machine being protected by the Windows firewall.

        Simon.
        --
        Simon Butler
        Exchange MVP

        Blog: http://blog.sembee.co.uk/
        More Exchange Content: http://exchange.sembee.info/
        Exchange Resources List: http://exbpa.com/
        In the UK? Hire me: http://www.sembee.co.uk/

        Sembee is a registered trademark, used here with permission.

        Comment

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