Microsoft KB Archive/827551

= A signed or encrypted message that contains an attachment takes a long time to be delivered from a Windows 2000-based computer =

Article ID: 827551

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
Consider the follow scenario:
 * You are using a Microsoft Windows 2000-based computer.
 * You use the Defense Messaging System (DMS) program to send a signed or encrypted message to a Simple Mail Transfer Protocol (SMTP) address.
 * The message contains an attachment that is larger than 500 KB.

In this scenario, the message takes a long time to be delivered to the recipient.



CAUSE
DMS uses the XEXCH50 command to relay certain message properties, such as envelope, message, and recipient properties. The XEXCH50 command is a Microsoft Exchange extension that is supported by SMTP. An XEXCH50 command that has received a success type response is then followed by a binary large object (BLOB) of variable size.

This problem occurs because signed or encrypted messages that contain attachments that are larger than 500 KB create large BLOBs. These BLOBs block the SMTP route for a short time.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
No prerequisites are required.

Restart requirement
You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time   Version            Size    File name --  22-Aug-2003  10:32  5.0.2195.6808     322,320  Aqueue.dll 22-Aug-2003 10:32  5.0.2195.6808      67,856  Mailmsg.dll 22-Aug-2003 10:32  5.0.2195.6808      38,672  Ntfsdrv.dll 22-Aug-2003 10:32  5.0.2195.6810     444,688  Smtpsvc.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

816915 New file naming schema for Microsoft Windows software update packages

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbqfe kbhotfixserver kbbug kbfix kbwin2000presp5fix kbpubtypekc KB827551

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