Q102107: SMTP: Err Msg: ERROR Network_Read: Lost Network Connection

Article: Q102107
Product(s): Microsoft Mail For PC Networks
Version(s): MS-DOS:3.0
Operating System(s): 
Keyword(s): 
Last Modified: 25-MAY-2001

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The information in this article applies to:

- Microsoft Mail Gateway to SMTP, version 3.0 
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SUMMARY
=======

When a connection begins for the Microsoft Mail Gateway to SMTP, the first thing
that occurs is a greeting exchange between the TCP/IP host and the SMTP gateway
computer. RFC 822 specifies that these greeting replies include host names.
However, the SMTP gateway does not include the host names in its greeting
replies. Most hosts ignore this particular piece of the 822 RFC.

When communicating with an IBM VM host running IBM VM SMTP V2R2, an error may
occur because IBM VM requires that the host name be included. As a result, the
gateway log file, SMTPGATE.LOG, will record the following error message:

  ERROR Network_read: Lost network connection

STATUS
======

Microsoft has confirmed this to be problem in version 3.0 of Microsoft Mail
Gateway to SMTP. This problem was corrected in version 3.0.1 of SMTPGATE.EXE. If
you do not have version 3.0.1 (or later), you can obtain the latest version from
the Microsoft Software Library (MSL). Download SMTPGW.EXE (S14223), a
self-extracting file, from any of 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 SMTPGW.EXE, 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 SMTPGW.EXE

- 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 SMTPGW.EXE.


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

  Q119591 How to Obtain Microsoft Support Files from Online Services


MORE INFORMATION
================

The following is an example of what happens when you connect to the IBM VM host
with a telnet session on port 25:

  $ telnet 128.227.212.10 25
  Trying...
  Connected to 128.227.212.10.
  Escape character is '^]'.
  220 yourhost.yourdomain.com running IBM VM SMTP V2R2 on Fri, 19 Mar 93
  12:19:29 EST
  HELO
  501 Syntax Error. Domain name missing
  helo myhost.mydomain.com
  250 yourhost.yourdomain.com is my domain name.
  quit
  221 yourhost.yourdomain.com IBM VM SMTP V2R2 closing connection
  Connection closed by foreign host.

Additional query words: 3.00

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Keywords          :  
Technology        : kbMailSearch kbMailGateSearch kbZNotKeyword3 kbMailGateSMTP300
Version           : MS-DOS:3.0

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