Article ID: 267245
Article Last Modified on 10/28/2006
APPLIES TO
- Microsoft Exchange Server 5.5 Standard Edition
This article was previously published under Q267245
SYMPTOMS
When you send an e-mail message, if the Domain Name System (DNS) records for a target domain are unreachable or a remote server denies the Internet Protocol (IP) address of the Exchange Server computer, the Internet Mail Service may either silently drop the e-mail message or incorrectly return a non-delivery report (NDR) message without trying to send the message again. This occurs even though the Internet Mail Service should try to send the e-mail message again, because at least one IP address may be temporarily unreachable.
CAUSE
This issue can occur if the Exchange Server computer incorrectly sets retry for an outbound message when there are several mail exchanger (MX) records for a target domain in DNS.
RESOLUTION
To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
191014 XGEN: How to Obtain the latest Exchange Server 5.5 Service Pack
STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 4.
Additional query words: IMS
Keywords: kbbug kbexchange550presp4fix kbexchange550sp4fix kbfix kbqfe KB267245
