X400: Unable to Send or Receive Mail

Last reviewed: March 9, 1998
Article ID: Q124737
3.20 MS-DOS kb3rdparty kbfile kbbug3.00 kbbug3.20 kbfix

The information in this article applies to:

  • Microsoft Mail Gateway to X4.00, version 3.2

SYMPTOMS

Version 3.2 of Microsoft Mail Gateway to X.400 may disconnect an existing session under heavy use conditions or it may be unable to establish outgoing or incoming connections, and it may display one or all of the following errors:

   ERROR 3 (RTS): RTS open refused (Session limit exceeded)

   DEBUG (T4_recv): Connection xx: tp_wait() failed:15

   DEBUG (T4_send): Connection xx: tp_accept() failed:1

CAUSE

If the gateway is under heavy use, two errors may occur as it counts the number of active connections:

  1. This count is incorrectly decremented with every occurrence of a connection request on the listening connection. This is incorrect; the listening connection is not an active connection. Eventually, the count will decrement to zero (0), and if a connection is active, it will be closed.

  2. Every attempted connection used additional memory in RAM. The previous connection attempt was not being cleared from memory. The lack of memory results in the "tp-wait" errors. The "tp_accept" errors tell the sending MTA that the gateway cannot accept incoming connections at that time.

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

   ARTICLE-ID: Q119303
   TITLE     : X400: Err Msg: ERROR 3 (RTS): RTS Open Refused...

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 3.2.12. If you do not have version 3.2.12 (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

MORE INFORMATION

The updated X400GATE.EXE file includes the following modifications for the causes listed above:

  1. The count is no longer decremented unless an active connection is released.

  2. The TP4 stack is deactivated and reactivated with each connection attempt, freeing up memory.

There is also a workaround for the memory issue: the TP4 stack can be allocated more memory by adjusting the [PLUTO] section of the PROTOCOL.INI file, as follows:

   [PLUTO]
     memory=8192

The default value is 512 bytes/connection. For more information about the memory parameter, see Chapter 2 of the TP4/CLNP "Administrator's Reference."


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


THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

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