DOCUMENT:Q191687 22-APR-2001 [exchange] TITLE :XIMS: Outlook Express POP3, Error 0x800ccc0e, Socket Err 10061 PRODUCT :Microsoft Exchange PROD/VER::5.0,5.5 OPER/SYS: KEYWORDS:kberrmsg exc5 exc55 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, versions 5.0, 5.5 - Microsoft Outlook 2000, Service Release 1 (SR-1) - Microsoft Outlook 98 - Microsoft Outlook 97 ------------------------------------------------------------------------------- SYMPTOMS ======== When you try to send or receive messages using Outlook Express or Outlook, you may receive an error message. When you try to send a message to your Simple Mail Transfer Protocol (SMTP) server, you may receive the following error message: The connection to the server has failed. Account: 'your_account', Server:'your_SMTP_server', Protocol:SMTP, Port: 25, Secure(SSL): NO, Socket error: 10061, Error Number: 0x800ccc0e Similarly, when you start the e-mail client or try to receive a message from your Post Office Protocol version 3 (POP3) server, you may receive the following error: The connection to the server has failed. Account: 'your_account', Server:'your_POP3_server', Protocol:POP3, Port: 110, Secure(SSL): NO, Socket error: 10061, Error Number: 0x800ccc0e CAUSE ===== The client connects to a port that is blocked or unavailable on the mail server. If the client is attempting to send a message, the blocked port is 25, and if the client is attempting to retrieve a message, the blocked port is 110. Refer to the error message for the protocol and port numbers. WORKAROUND ========== To work around this behavior, make ports 110 and 25 available. Ports 110 and 25 are available by default when the Exchange Server services start. The ports 110 for POP3, 119 for Network News Transfer Protocol (NNTP), and 143 for Internet Message Access Protocol (IMAP) are automatically opened and made available on the Exchange Server computer when the Information Store service starts. Port 25 is automatically made available when the Internet Mail Service starts. If these services do not start, then the ports are not available. If the services are running, you can verify that these ports are listening (open) on the server by using the Netstat utility that is included with Windows NT Server: 1. Open a command prompt on the Exchange Server computer. You need to modify the command prompt properties, because the data scrolls off the screen. Open the command prompt, right-click the upper-left corner of the window, and then click Properties. Click the Layout tab, and then change the screen buffer size to 1,000. Apply the change. You are prompted to either modify the current window or the shortcut that you used to start the command prompt. You can modify the shortcut for future convenience. 2. At the command prompt, type "netstat -an" (without the quotation marks). Scroll back to the beginning of the data output, and look for the following entries. Proto Local Address Foreign Address State TCP 0.0.0.0:25 0.0.0.0:0 LISTENING TCP 0.0.0.0:110 0.0.0.0:0 LISTENING If these entries are present, Exchange Server is listening on ports 110 and 25 on all interfaces. This is normal. If these ports are not available, you may need to further troubleshoot the following services or systems. The following general causes may "hold" these ports, or make them unavailable: - The Exchange Server information store service is not running, or the POP3 protocol is not enabled and listening to port 110. Verify that the information store service is running. For additional information about troubleshooting the POP3 protocol, click the article number below to view the article in the Microsoft Knowledge Base: Q161118 XCLN: Troubleshooting POP3 Connections to Exchange Server - The Internet Mail Service is not running or is not listening on port 25. Verify that the Internet Mail Service is running. For additional information about testing the Internet Mail Service and port 25, click the article number below to view the article in the Microsoft Knowledge Base: Q153119 XFOR: Telnet to Port 25 of IMC to Test IMC Communication - A proxy server located between the client and the server may be blocking access to these ports to the Exchange Server computer. For additional information about configuring Exchange Server through a proxy server, click the article numbers below to view the articles in the Microsoft Knowledge Base: Q148732 XADM: Setting TCP/IP Port Numbers for Internet Firewalls Q176466 XGEN: TCP Ports and Microsoft Exchange: In-depth Discussion - Another application, such as virus-scanning software, has reassigned port 25 to another port. Disable all non-essential services, including antivirus software, and then restart the server. MORE INFORMATION ================ It is also possible to receive this error message when you have antivirus e-mail protection enabled on your computer. Additional query words: exfaq ====================================================================== Keywords : kberrmsg exc5 exc55 Technology : kbOutlookSearch kbExchangeSearch kbExchange500 kbExchange550 kbZNotKeyword2 kbOutlook2000Search kbOutlook97Search kbOutlook98Search kbZNotKeyword3 kbOutlook2000SR1 Version : :5.0,5.5 Issue type : kbprb ============================================================================= 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. 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