Microsoft KB Archive/239816

= XIMS: Exchange Server Internet Mail Service Stops Responding with a Particular Message =

Article ID: 239816

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition
 * Microsoft Exchange Server 5.5 Service Pack 1
 * Microsoft Exchange Server 5.5 Service Pack 2

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This article was previously published under Q239816





SYMPTOMS
When a message is sent to a domain whose mail servers are currently unavailable and the message has a subject that includes the substring "%s", the Internet Mail Service may stop responding (crashes) if the SMTP protocol logging is set to Maximum.



CAUSE
The crash occurs when the "499 No routing hosts are reachable" error is written into the SMTP log file. The original string to be written is:

"7/5/99 9:31:55 PM : 499 No routing hosts are reachable for test.com. Message subject: ""RE:33%s5%s99"". Rescheduling delivery for later."

The Internet Mail Service fails to determine whether "%s" is a substring or a specification of a substring.



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



WORKAROUND
Disable SMTP protocol logging.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Exchange Server 5.5 Service Pack 4.

Keywords: kbbug kbexchange550presp4fix kbexchange550sp4fix kbfix kbqfe KB239816

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