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Newbie - IP has been changed for WAN RRS feed

  • Question

  • Hi all,

    I'm new at the exchange server thing and have been given the job of looking after IT.  I've got a pretty extensive background in other computer "stuff" and can play with routers quite happily - but I'm in the (hard) beginnings of the learning curve with exchange.  A lot of information out there assumes that you have read the book from the start and know how to navigate around the software. I've had to hit the ground running and there are a LOT of debri and I keep tripping. :P

    My question is as follows. :)

    When I came here, we were using a 3G dongle to access the internet and emails, with a fixed IP.  Today, we moved away from the 3G to a wireless version of ADSL. We received a new router and an new IP address. The internet is working fine and I can send emails to myself and to others in the intranet - but we aren't receiving emails from outside.

    We host our own exchange server (2003) but our domain is hosted elsewhere.

    What I need to know is, how do I check the IP address that exchange is using for receiving emails? Should I be changing the pointers where the domain is hosted?

    Please dumb it down, as my knowledge is sparce in this area. Ask me anything about most of other things, but I've left the "real" networking to the experts - but now it seems that I'm having to learn to be an expert. :D

    Thanks to everyone, in advance. :D

    Mandy

    Thursday, August 18, 2011 2:14 AM

Answers

All replies

  • What I need to know is, how do I check the IP address that exchange is using for receiving emails? Should I be changing the pointers where the domain is hosted?


    There are several ways to determine your mail exchanger. One way is to use services on the Web, such as with the link below. Your MX record need to point to your new IP address. That is if your Exchange server is configured to receive mail directly. You might also have a third party hosting your SMTP gateway for antivirus /anti-spam handling. If that is the case, they will need the new IP address.

    Type your domain, query type: MX - Mail exchange

    NsLookup
    http://centralops.net/co/NsLookup.aspx

    An alternative way would be to use the command line ("Dos box"):

    C:\Users\felicia>nslookup -querytype=MX
    Default Server:  dc-01.smith.lan

    Address:  10.0.0.4

    > hosle.org

    Server:  dc-01.smith.lan
    Address:  10.0.0.4

    Non-authoritative answer:
    hosle.org       MX preference = 10, mail exchanger = mx.hosle.org
    hosle.org       MX preference = 20, mail exchanger = mx2.mailhop.org

    mx.hosle.org    internet address = 83.109.5.247

    > quit

    C:\Users\felicia>

     


    MCTS: Messaging | MCSE: S+M
    • Proposed as answer by Xiu Zhang Friday, August 19, 2011 7:41 AM
    Thursday, August 18, 2011 2:53 AM
  • On Thu, 18 Aug 2011 02:14:31 +0000, PC Girl wrote:
     
    >I'm new at the exchange server thing and have been given the job of looking after IT. I've got a pretty extensive background in other computer "stuff" and can play with routers quite happily - but I'm in the (hard) beginnings of the learning curve with exchange. A lot of information out there assumes that you have read the book from the start and know how to navigate around the software. I've had to hit the ground running and there are a LOT of debri and I keep tripping. :P
    >
    >My question is as follows. :)
    >
    >When I came here, we were using a 3G dongle to access the internet and emails, with a fixed IP. Today, we moved away from the 3G to a wireless version of ADSL. We received a new router and an new IP address. The internet is working fine and I can send emails to myself and to others in the intranet - but we aren't receiving emails from outside.
    >
    >We host our own exchange server (2003) but our domain is hosted elsewhere.
     
    Does that mean that your external DNS is at your ISP? Or does it mean
    you have your e-mail delivered somewhere else?
     
    >What I need to know is, how do I check the IP address that exchange is using for receiving emails?
     
    Your Exchange server is probably using an IP address on one of the
    non-routable networks (10.0.0.0\8, 192.168.0.0\16, or 172.16.0.0/12).
    You probably have a routable IP address assigned to your router.
     
    In your external DNS, the MX record references the "A" record for your
    server's name. That "A" record has the external IP address of your
    router. If it still has the old IP address it needs to be changed.
     
    Your external IP address should also have a PTR record in DNS. Arrange
    with your ISP to make sure it's there. The name on the PTR should
    match the name your SMTP server places into the HELO or EHLO command
    it sends when it starts a conversation with another SMTP server.
     
    >Should I be changing the pointers where the domain is hosted?
     
    You should change the A and PTR records (or have the ISP change them).
     
    ---
    Rich Matheisen
    MCSE+I, Exchange MVP
     

    --- Rich Matheisen MCSE+I, Exchange MVP
    Thursday, August 18, 2011 3:59 AM
  • So far how did you access ur mails from outside.

     

    -bpara

    Thursday, August 18, 2011 5:57 AM
  • Hi, We need to configure the following to receive internet emails.

     1. Configure recipient policies.

    2. Configure inbound SMTP virtual server settings.

    Manually Configuring Your Exchange Server for Internet Mail Delivery

    http://technet.microsoft.com/en-us/library/aa998167(EXCHG.65).aspx

    Xiu

    • Proposed as answer by Xiu Zhang Monday, August 22, 2011 5:27 AM
    • Marked as answer by Xiu Zhang Wednesday, August 24, 2011 3:06 AM
    Friday, August 19, 2011 7:45 AM