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Exchange 2010 Email stuck in queue

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  • Exchange 2010 Email stuck in queue

    Hi All



    I'm right in the middle of an Exchange 2003 to 2010 transition, everything has gone fine up to this point and we are happily migrating users over to the new system. Today I added a second server running the CAS, Hub and mailbox roles, the problem I have is that straight after install the server joined the CAS array and started receiving mail, we then started getting calls to say mail was disappearing, I checked on the second server and the mail is sitting there unable to be routed through the connectors on the first server, on the new server the mail is queued in the connector but if you look at the first server there is no mail in the queue, this is for both external mail and through the routing group connector to the old system...any ideas? have to say I'm stumped on this one.....

  • #2
    Re: Exchange 2010 Email stuck in queue

    Primary reason for this is a restriction of some kind on the receive connectors, which isn't allowing the traffic to pass between the servers.

    CAS Array is AD site specific, so joining the array is to be expected.
    Exchange will use a server as soon as it comes online, in effect it goes in to production immediately.

    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: Exchange 2010 Email stuck in queue

      Thanks for the reply, pretty sure that the routing group connector between the 2010 and 2003 systems is blocking the second server (first 2010 server is routing fine) would I have to add the second server into the connector? or create it's own... I was under the impression that the first server would route the mail for the second? if so it may explain the external mail from the second server not working as if it's going out using a different IP it would be blocked on the firewall (first server goes out on a different IP)

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      • #4
        Re: Exchange 2010 Email stuck in queue

        On Exchange 2007 and higher the transport servers are all equal.

        Therefore as long as they can route email between themselves you should be able to route across the RGC. If server 1 can route, then as long as server 2 can talk to server 1 the email will flow - hence the restrictions on the connector being the cause.

        You can add the second server to the router group connector if you wish, but it shouldn't be necessary.

        You need to look at whether the two servers can talk to each.

        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


        • #5
          Re: Exchange 2010 Email stuck in queue

          Right fingers crossed I think I've sorted it, there were two problems firstly, there was a relay receive connector set up and the range overlapped the second servers IP so it looks as though the second server was trying to use that connector and of course it couldn't authenticate, secondly the external connectors route through a smart host which is set to only accept traffic from the external IP that was natted for the first server so when I added the second in as a source server it couldn't connect, removed it as a source server and let the first do the routing and the queues disappeared (all except shadow redundancy that is)
          Thanks for pointing me in the right direction

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