Unable to bind to the destination server in DNS when sending external emails

Posted on 2008-11-06
Last Modified: 2010-04-21

This doesn't seem to be a huge problem as it only seems to be affecting one or 2 external clients. Emails from the users here to this other company get caught in the queue with the Unable to bind to the destination server in DNS as an error. I've had a look on the net and found a few things about removing entries for external DNS servers in the SMTP virtual server (which was empty anyway).

I've run an smtpdiag test, everything has passed barring:

Checking MX records using TCP:
Warning: The TCP DNS query returned no results.
Checking MX records using UDP:
Error: No MX or A records were found for the remote domain. Verify that the
remote domain is valid. Your firewall allows outbound DNS queries (Windows
NT/2000 Server requires TCP), and your DNS server can resolve external domains.

Am i right in thinking that this is a problem with the recepient or could this still be an issue with our Exchange/DNS here?

Question by:the1paulcole
    LVL 19

    Accepted Solution

    it appears that has no dns records.
    it is registered though.
    [root@web ~]# whois
        Domain name:
            GRS International
        Registrant type:
        Registrant's address:
            Trent House, 3 Sewardstone Road
            Waltham Abbey
            EN8 1NA
            K4Zone Ltd [Tag = TOWNSITES]
        Relevant dates:
            Registered on: 13-Sep-2004
            Renewal date:  13-Sep-2010
            Last updated:  02-Oct-2008
        Registration status:
            Registered until renewal date.
        Name servers:
        WHOIS lookup made at 23:21:05 06-Nov-2008

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    LVL 19

    Expert Comment


    [root@web ~]# host -tany
    Using domain server:
      has no ANY record

    Open in new window

    LVL 1

    Author Closing Comment

    Thank you. I checked this on DNS Stuff, but I'm still sort of learning this as I go so wanted to double-check that I was reading what I saw correctly. Thanks again

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