X400: Slow Message Transfer

Last reviewed: March 9, 1998
Article ID: Q111946

3.00 3.20 MS-DOS kb3rdparty kbfile kbbug3.00 kbbug3.20 kbfix

The information in this article applies to:

Microsoft Mail Gateway to X.400, versions 3.0 and 3.2

SYMPTOMS

Microsoft Mail Gateway to X.400 may process messages slowly.

CAUSE

Slow message transfer may result from a large (4000 or more names) custom address map. The X.400 gateway reads the custom address map file (MAPTBL.OUT) in 1K blocks. If a large custom address map exists, it takes time to read the entire file. Other X.400 gateway read activity is handled in 4K blocks.

RESOLUTION

Microsoft has made two changes to the X.400 gateway to increase the search speed when you use a custom mapping table:

The algorithm used to search the custom mapping table has been changed to search first on the X.400 O/R attribute most likely to be unique (the surname attribute).
A parameter is now available in the X400GATE.INI file that allows you to move the mapping table to the local gateway computer. The table can then be loaded into a RAMDrive for quick access. You should add the new parameter to the [Microsoft X.400 gateway] section, following the example below:
```
      [Microsoft X.400 gateway]
      LocalCustomMappingFile=c:\maptbl.out
```

For more information about the custom mapping table, please see the X.400 Gateway "Administrator's Guide." For more information about the RAMDrive program, please see your Microsoft MS-DOS documentation.

STATUS

Microsoft has confirmed this to be a problem in versions 3.0 and 3.2 of Microsoft Mail Gateway to X.400. This problem is corrected in X400GATE.EXE version 3.2.13. If you do not have version 3.2.13 (or later), you can download X400GA.EXE, a self-extracting file, on the following services:

Microsoft's World Wide Web Site on the Internet

      On the www.microsoft.com home page, click the Support icon.
      Click Knowledge Base, and select the product.
      Enter kbfile X400GA.EXE (size: 203636 bytes) 
                             , and click GO!
      Open the article, and click the button to download the file.

Internet (anonymous FTP)

      ftp ftp.microsoft.com
      Change to the Softlib/Mslfiles folder.
      Get X400GA.EXE (size: 203636 bytes)

The Microsoft Network

      On the Edit menu, click Go To, and then click Other Location.
      Type "mssupport" (without the quotation marks).
      Double-click the MS Software Library icon.
      Find the appropriate product area.
      Locate and Download X400GA.EXE.

Microsoft Download Service (MSDL)

      Dial (206) 936-6735 to connect to MSDL
      Download X400GA.EXE (size: 203636 bytes)

For additional information about downloading, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q119591
   TITLE     : How to Obtain Microsoft Support Files from Online
               Services

Additional reference words: x400 address table 3.00 3.20 receiving
KBCategory: kb3rdparty kbfile kbbug3.00 kbbug3.20 kbfix
KBSubcategory: MailGWX400
Keywords : MailGWX400 kb3rdparty kbbug3.00 kbbug3.20 kbfile kbfix
Version : 3.00 3.20
Platform : MS-DOS

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Last reviewed: March 9, 1998
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.