XADM: Too Many Consecutive CRLF Characters Truncate Message or Cause Information Store to Stop Responding

ID: Q235219

The information in this article applies to:

Microsoft Exchange Server, version 5.5

SYMPTOMS

If the IMS receives an inbound SMTP message that includes a large number of consecutive carriage-return line-feed (CRLF) characters in Japanese encoding, the message may be truncated at the CRLF characters, or the Information Store may stop responding. If the message is very large, stack overflow occurs and the Information Store stops responding.

CAUSE

When a whole series of CRLF characters are copied at one time, the operation will fail if the CRLF characters do not fit in the output buffer. On the other hand, if the free space in the output buffer exceeds the margin (256 bytes), the buffer is not reallocated. This problem always occurs when the series of CRLF characters exceeds the buffer size (4096 bytes = 2048 CRLF pairs), and in certain circumstances, it may occur with as little as 128 CRLF pairs, or with any number in between.

RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Microsoft Exchange Server version 5.5 service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

The English version of this fix should have the following file attributes or later:

Component: Information Store

File name	Version
Gapi32.dll	5.5.2637.0
Mdbmsg.dll	5.5.2637.0
Netif.dll	5.5.2637.0
Store.exe	5.5.2637.0

Component: Directory

File name	Version
Dsamain.exe	5.5.2600.0

NOTE: If this product was already installed on your computer when you purchased it from the Original Equipment Manufacturer (OEM) and you need this fix, please call the Pay Per Incident number listed on the above Web site. If you contact Microsoft to obtain this fix, and if it is determined that you only require the fix you requested, no fee will be charged. However, if you request additional technical support, and if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support, you may be charged a non-refundable fee.

For more information about eligibility for no-charge technical support, see the following article in the Microsoft Knowledge Base:

Q154871 Determining If You Are Eligible for No-Charge Technical Support

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5.

Additional query words: internet


Keywords          : exc55 
Version           : winnt:5.5
Platform          : winnt 
Issue type        : kbbug

Last Reviewed: July 12, 1999