This article was previously published under Q173676
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When you use a Microsoft Windows NT version 4.0 Domain Name Service (DNS)server, your clients may not be able to successfully resolve mail servernames to IP addresses.
The DNS client is sending a recursive query to the Microsoft DNS server,which is forwarding that query to a BIND-based DNS server. Some BIND-basedDNS servers return a Start of Authority (SOA) record with a ResponsibleAuthoritative Mailbox field instead of a Mail eXchange (MX) record. If theauthoritative DNS server for the domain in which the mail server resides isone of these BIND-based DNS servers, the Microsoft DNS server will notreturn that record to the client.
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.