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How to create a backup 2003, IIS, SMTP Server

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  • How to create a backup 2003, IIS, SMTP Server

    Hi,

    Our site has a main link to the Internet with an Exchange server handling mail for the company this works fine. In addition we also have a totally seperate link, with a totaly seperate public IP address through a different ISP completely seperate to our LAN. I want to use this second connection to setup a server that will collect mail in the event either our main exchange server goes down or our main link goes down to ensure no-one externally trying to send mail to us gets any undeliverable messages. Can I and if so how would I configure a Windows 2003 server with IIS and SMTP installed to collect mail if the main exchange box isnt contactable and then pass it onto the main exchange server when it comes back on line. I know how to configure the MX records its more how do I configure the backup server I need advice on.

    You help would be appreicated.

  • #2
    Re: How to create a backup 2003, IIS, SMTP Server

    Originally posted by backpedal View Post
    Hi,

    Our site has a main link to the Internet with an Exchange server handling mail for the company this works fine. In addition we also have a totally seperate link, with a totaly seperate public IP address through a different ISP completely seperate to our LAN. I want to use this second connection to setup a server that will collect mail in the event either our main exchange server goes down or our main link goes down to ensure no-one externally trying to send mail to us gets any undeliverable messages. Can I and if so how would I configure a Windows 2003 server with IIS and SMTP installed to collect mail if the main exchange box isnt contactable and then pass it onto the main exchange server when it comes back on line. I know how to configure the MX records its more how do I configure the backup server I need advice on.

    You help would be appreicated.
    In DNS, configure 2 MX records pointing to your respective exchange servers on different netwnorks. When setting up your MX records, your primary exchange server should have a lower numberic priority value than your backup exchange server.

    In this situation, assuming Utopia, mail should be routed to the primary exchange server. If it is unavailable, mail will be routed to the backup exchange server.

    The question is, with the backup exchange server not being on your network, do you expect to be able to route the mail to your LAN at some point and how are mailboxes set up on the backup exchange server? Does it have visibility to a domain controller?
    VCDX3 #34, VCDX4, VCDX5, VCAP4-DCA #14, VCAP4-DCD #35, VCAP5-DCD, VCPx4, vEXPERTx4, MCSEx3, MCSAx2, MCP, CCAx2, A+
    boche.net - VMware Virtualization Evangelist
    My advice has no warranties. Follow at your own risk.

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    • #3
      Re: How to create a backup 2003, IIS, SMTP Server

      Most email servers will continue to try and send you email for up to 48 hours, with the most error messages that they will get is a delay message.

      Backup MX records I find are nothing but spam traps, and I don't recommend their use. I work on the principle that if email is down for 48 hours then you have bigger problems to worry about.

      My preferred method is to use the a dynamic DNS address and only use the backup server in the event of a failure. I blogged on the process here:
      http://www.sembee.co.uk/archive/2007/02/02/38.aspx

      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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