XFOR: IMC Unable to Resolve Host Addr. Using Raptor Firewall (159299)
The information in this article applies to:
- Microsoft Exchange Server 4.0
This article was previously published under Q159299 SYMPTOMS
When using Raptor Firewall DNS proxy caching, and trying to send mail to a
host where the Mail domain is the same as the Address Record domain, the
IMC cannot resolve the Fully Qualified Domain Name (FQDN) to an IP address.
For example, the Address (A) record and Mail Exchanger (MX) record in the
DNS may look like the following:
microsoft.com. IN A 123.123.123.123
microsoft.com. IN MX 10 microsoft.com.
CAUSE
The IMC buffer that holds the DNS response incorrectly assesses the end of
the buffer. If there are no additional resource records, this causes the
IMC to fail during host resolution.
WORKAROUND
Change the mail domain so that it is different from the mail exchanger
host. This means the SMTP address used by your Microsoft Exchange Server
users will also change.
STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 4.0.
This problem was corrected in the latest Microsoft Exchange 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):
| Modification Type: | Minor | Last Reviewed: | 4/28/2005 |
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| Keywords: | kbbug kbfix kbusage KB159299 |
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