XIMS: Outlook Express POP3, Error 0x800ccc0e, Socket Error 10061

• Microsoft Exchange Server, versions 5.0, 5.5

SYMPTOMS

When you try to send or receive messages using Outlook Express, an error message may be displayed. When you try to send a message to your Simple Mail Transfer Protocol (SMTP) server, the following error message may be displayed:

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

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 is not available 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 problem, make ports 110 and 25 available. You may need to further troubleshoot the following components 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 anti-virus software, and then restart the server.

Additional query words: exfaq

Keywords : XIMS exc5 exc55
Version : winnt:5.0,5.5
Platform : winnt
Issue type : kbprb