SMTPSVC warning/error (event id 2012, 2013)

Discussion in 'Windows Small Business Server' started by Eric, Feb 2, 2005.

  1. Eric

    Eric Guest

    I keep getting a few warnings: " SMTP could not connect to the DNS server
    'x.x.x.x'. The protocol used was 'UDP'. It may be down or inaccessible.

    Then I get an error message "SMTP could not connect to any DNS server.
    Either none are configured or all are down".

    My DNS is running and I can ping external DNS servers, which I set as my
    forwarders. I can browse the Internet even though it is slow and I can
    send/receive emails.

    Please advise.
    Great thanks!

    Eric, Feb 2, 2005
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  2. In
    Can you check the SMTP queue? You can find that here:

    C:\Program Files\Exchsrvr\Mailroot\vsi1\Queue

    If there are a lot of messages it could be that your server is used for a so
    called NDR spam run.

    a. Load exchange system manager and then click the + on Global Settings.
    b. Right click on Delivery options and choose Properties.
    c. Click on the tab for "Recipient Filtering".
    d. I checked the box for "filter recipients that are not in the directory".
    Once this box is checked the server gives you a message that you still have
    to make another setting to complete the process as described in next step.
    e. As a final setting you have to go to the SMTP Virtual Server (also in the
    exchange system manager under the server) right click on the SMTP virtual
    server and choose Properties. Now go to Advanced for the IP address and
    click EDIT for the IP address (usually unassigned) and you will see a check
    box that says "Apply Recipient Filter". Check that box.
    f. Now this will stop the exchange server from taking a message to a user
    that does not exist on your domains (active directory in this case) and
    sending NDR reports back to the spammers reducing traffic on the server.
    You can also delete all the messages currently in your Exchange queue by
    stopping the SMTP server, deleting all the files under “C:\Program
    Files\Exchsrvr\Mailroot\vsi1\Queue” and restart the SMTP service. Remember
    these messages are not delivered because the addresses they are being sent
    to do not exist (unless you have an extremely busy server and very low
    bandwidth in which case you better open some of them and verify they are all
    Mariette Knap [SBS MVP], Feb 2, 2005
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  3. Eric

    Eric Guest

    Thank you for your prompt response.

    I have it configured exactly the way you said and the Queue is empty. But
    still it does not resolve an issue.
    Eric, Feb 2, 2005
  4. Eric

    BrandonH Guest

    BrandonH, Mar 2, 2005
  5. Eric

    BrandonH Guest

    I have the SAME exact problem and also do not have any queued items other
    than the domain that is failing and causing this error in my event log.

    I get the same above two event id's about 1hr and 15 min apart, but only
    when I'm sending to a specific remote domain. All other remote inquiries
    (that I'm aware of) pass fine without problem.

    Server passes Netdiag test AND smtpdiag tests pass even when using the "bad"
    email address that causes the failure.

    Anyway, if I play around with it long enough by nslookup'ing and/or (haven't
    kept track of what precisely is allowing it to finally send) forcing
    connection the stuck email eventually gets through, and the event ID's stop.

    It makes no sense.

    Any help would be appreciated thanks.

    BrandonH, Mar 2, 2005
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