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Unable to connect to port 25 on host server

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  • Unable to connect to port 25 on host server

    I have one Windows 2003 server installed with Microsoft Virtual Server and have a few virtual machines running inside Microsoft Virtual Server. The virtual machines are able to telnet to port 25 of our mail server but the physical server is unable to telnet to port 25 of our mail server. Any idea how to solve this problem? Thanks in advance

  • #2
    Re: Unable to connect to port 25 on host server

    Is this correct. You have a Windows Server 2003 and are running Virtual Server on it. You have Virtual Servers running in the Virtual Server that is running on the physical Server.

    If not correct, please provide a more accurate description of your setup and configuration of your Server(s). The more info the better you can be assisted in resolving this problem you have.
    1 1 was a racehorse.
    2 2 was 1 2.
    1 1 1 1 race 1 day,
    2 2 1 1 2

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    • #3
      Re: Unable to connect to port 25 on host server

      where is the mail server located?

      what subnets are you using for your hosts?
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      • #4
        Re: Unable to connect to port 25 on host server

        Tehcamel's questions should point you in exactly the right direction - the simplest reason I can think of is that your mailserver is a virtual machine and all other VMs can ping it and/or telnet to it, because all your VMs are on one subnet, but your physical machines may be on a different subnet. Is that the case? If not, please describe your setup more, as suggested by Biggles and Tehcamel.

        So your first step is to look at the subnets of the virtual machines, and consider them as one network, then see if you can configure them to be on the same subnet as the physical machine.
        Best wishes,
        PaulH.
        MCP:Server 2003; MCITP:Server 2008; MCTS: SBS2008

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