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# SMTP: Err Msg: Error Bind (110) Smtp_listen System Error

Article ID: 115491

Article Last Modified on 10/30/2006

APPLIES TO

- Microsoft Mail Gateway to SMTP 3.0

This article was previously published under Q115491

## SYMPTOMS

Microsoft Mail Gateway to SMTP may produce the following error when starting:
Error bind (110) smtp_listen system error

## CAUSE

When the SMTP gateway starts, it attempts to lock open the first socket from the TCP/IP software. If the socket is not available or is already locked open by an incoming connection, the error occurs.

## RESOLUTION

Try to restart the SMTP gateway. If you still get the error, ensure that the mail routing host has nothing queued up for the SMTP gateway and then try to restart the gateway again.
You can also disconnect the network cable from the SMTP gateway computer, start the gateway and plug the network cable back in to ensure there are no incoming connections.

## STATUS

Microsoft has confirmed this to be a problem in Mail Gateway to SMTP version 3.0. To resolve this problem, obtain the TCPTSR.EXE upgrade (dated 09/06/95, 66,816 bytes).

## MORE INFORMATION

You can find TCPTSRU.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 TCPTSRU.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 TCPTSRU.EXE
- The Microsoft Network
  On the Edit menu, click Go To, and then click Other Location.
  Type `mssupport`.
  Double-click the MS Software Library icon.
  Find the appropriate product area.
  Locate and Download TCPTSRU.EXE.

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

119591 How to Obtain Microsoft Support Files from Online Services

Microsoft employees should connect to the CROSSPRD database.

Additional query words: 3.00 Lan Manager

Keywords: KB115491