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  1. #1
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    Unable to start Internet Mail Service

    Hi all,

    I have a problem with Exchange 5.5 running on SBS 4.5. When I restart the server the "Exchange Internet Mail Service" won't start because it's Unable to resolve the delivery route to the isp's smtp server. In Exchange I filled in the smtp server name instead of the ip (ie mail.isp.com) and the name is correct (I use that smtp server from another location without problems).

    In the eventviewer it further states: Since errors in delivery routing parameters can result in misrouted mail, the Internet Mail Service will not start until this error is corrected. Confirm that DNS is properly configured. If you are using a HOSTS file, confirm that it is properly configured.

    Now when I configured the internet connection (ADSL) I never got to specify any DNS server because according to the ISP it should be left blank. Calling the isp is out because although they do allow me to run a server they do not give support for it.

    I know nothing about DNS or whether we need to run our own DNS-server, the reason we opted for SBS is because it could be configured by non-techies.

    Anyone know how I can solve this? Usually, trying to restart the service half a dozen times works most of the times but that's not ideal.

    Thanks for reading this far <img src=/S/smile.gif border=0 alt=smile width=15 height=15>

    [edit]Yikes, this is the wrong forum, sorry[/edit]
    (Not any more ! - Leif

  2. #2
    Super Moderator jscher2000's Avatar
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    Re: Unable to start Internet Mail Service

    Can you ping mail.isp.com from the command line? If not, perhaps you do need to configure DNS manually.

    Does this machine use a fixed IP address, or DHCP? It sounds as though your provider intends to push down DNS servers from the DHCP server. This should work fine if you use DHCP, but on a server, you might be using a fixed IP address. In that case, you should look up the DNS servers on a working machine, using the ipconfig (NT) or winipcfg (9x) utility. You then can plug those into your network settings for the SBS machine and its vision should be restored.

    Why it works intermittently is a mystery to me; maybe nothing I've said here will be useful, but I think it's worth checking.
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  3. #3
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    Re: Unable to start Internet Mail Service

    Why can't you just use Exchange's smtp service? It seems silly to send it to the ISP to be sent when exchange can handle it on its own.

  4. #4
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    Re: Unable to start Internet Mail Service

    Sorry for the late reply,

    When I ping the mail.isp.com, I get request timed out (100 % packetloss).

    As it is now, I have 2 NIC's, one for internal connections and one for external. Based on the second NIC I had to make a "new connection" to dial in through a VPN (PPTP), this connection get's an IP auto-assigned by the ISP, also the DNS is auto-assigned in the same tab. Is this where I can specify wich DNS server to use? (i.e. my own? How do I figure out what IP my own DNS has? running winipcfg from a client? (that's what you mean by working machine right?))

    I do however have a static IP, where this one comes into play I know not...
    Thanks for your suggestions.

  5. #5
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    Re: Unable to start Internet Mail Service

    MaryJ,

    Your suggestion sounds like the ideal solution and I definatly want to go this way. However, I don't have the know-how to set it up. How would exchange know where to send it to? I think they key here would be our own DNS server?

    Thanks for the input.

  6. #6
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    Re: Unable to start Internet Mail Service

    you need a dns server, not necessarily your own, but we do run one our own and use the providers as backup.

    Are you using NT4 or win2k for the OS? The steps might vary depending on the version. The short version is to enable DNS - either on the SBS server or another server, if you have more than one. Then set up the gateways. Without looking closely at your setup and only seeing you mention 2 nics, it's possible you have the gateways messed up right now.

    We had that problem recently when we put a new ISA server machine online and removed the old one. Some of the servers using static IPs were still using the old server as their gateway, including the Exchange and DNS servers and the network was basically dead, no mail going in or out. <img src=/S/sad.gif border=0 alt=sad width=15 height=15>

  7. #7
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    Re: Unable to start Internet Mail Service

    We have a simple setup, one server for basically everything (filesharing, i-net acces, mail), and 8 or 9 clients. Running on SBS 4.5 (NT4) but next week we're changing to SBS2000.

    Here's how I thought it would work (please correct me if wrong), one nic talks to the internal network of clients (i.e. 192.168.etc), the second nic talks to the external modem who gets on the net.

    So if the server runs a DNS service, should I refer to it as the servers own internal IP? Nowhere on the entire network have I specified DNS #s or gateways. it was like that when I got here, but since we changed ISP the only thing I changed was the mailserver to relay to (it relayed to our old ISP) and the actual connection. Once the server works (and it does after a few tries of starting IMS) it's a nifty ol' spitfire.

    I got a dummy server running SBS2k, so rather than fixing the old, I prefer to start right anew (without relaying).

    Thanks, no mail going out does tend to freak people out...

  8. #8
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    Re: Unable to start Internet Mail Service

    we have our network using an ISA, so it may vary slightly with your setup.

    ISA has two NIC - one to the net and one to the LAN
    Nic to the net is setup to use ISP information - IP address, the internal DNS server and one of the isp's dns servers.

    Nic to the LAN is has internal address assigned by dhcp server we run. it points to the dns server we run and the gateway is the other IP that hooks to the net.

    all lan computers have dhcp address, they use the internal dns and their gateway is the LAN NIC on the ISA server. (The gateway tells all the machines where to find the way out.)

    I'm guessing you already have dhcp running and that it assigned the addresses. if you set up dns, you only need to make a change in the dhcp and the new information will be refreshed on the other machines. the lan uses the local dns server, the local dns server is told to use the isp dns server to resolve unknown hosts.

    it's actually quite easy, but we're using win2k and i'm not sure how alike the dialogs are to set it up.

  9. #9
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    Re: Unable to start Internet Mail Service

    Thanks, this sound like a simple setup.

    However, you say "Nic to the LAN is has internal address assigned by dhcp server we run"

    ...and then:
    "all lan computers have dhcp address, they use the internal dns and their gateway is the LAN NIC on the ISA server"
    How can you know wich # to put in as the gateway when it's an auto-assigned # ?

    I have two big problems:

    1) On the NIC that is set up to use the ISP info, I cannot fill in any dns servers. If I do, it won't connect (even if I use the dns servers the isp _will_ assign me). The kicker is though that I cannot leave it blank either, win2k starts to yack that since I run a DNS server it will put that number there (a wrong number 'cause when I try to change (read: delete) it, it says I _must_ change it 'cause it's reserved for loopback purposes (127.0.0.1).

    2) How can I figure out what ip my dns server has? Is it the same as the 'puter it's running on? That would mean that on a client, it's gateway and dns are one and the same IP.


    When I read your reply, it really all started dawning on me. Now, the more I get into it the less sense it makes to me. I really apreciate your help though.

    Btw, we don't run a dhcp server. When I installed 2k, it didn't auto install dhcp. If I can do without it then I would feel just fine.

  10. #10
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    Re: Unable to start Internet Mail Service

    FYI

    Changing "mail.isp.com" to its IP# worked, the internet Mail Service starts without problems. Still relaying mail but oh well. Time to read up on DNS and the like.

    Anyway thanks for trying to help me.

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