Adding a Third DNS Server Causes SMTP to Not Use MX Records

Last reviewed: February 3, 1998
Article ID: Q159932

The information in this article applies to:

Microsoft Commercial Internet System, version 1.0

SYMPTOMS

You may experience a parsing failure if the SMTP server fails to correctly parse the DNS names. However, the mail messages should still be delivered to the host indicated on the MX record.

Also, if you add a third DNS server, it can cause the SMTP server to use the "A" record when it should be using the MX record.

RESOLUTION

Upgrade to MCIS Service Pack 1 (SP1). The DNS list parsing code in the Smtpsvc.dll file which causes this problem was updated, and the SMTP server now correctly parses DNS names.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Commercial Internet System, version 1.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Version           : 1.0
Platform          : WINDOWS
Issue type        : kbbug

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Last reviewed: February 3, 1998
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