Exchange Server client receives an error message when it tries to send or receive e-mail: “Socket error: 10061, Error Number: 0x800ccc0e”
When you try to send or receive messages by using an Exchange server client, 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 trying to send a message, the blocked port is 25, and if the client is trying to retrieve a message, the blocked port is 110. Refer to the error message for the protocol and port numbers.
WORKAROUND
The following workaround should be performed on only the Exchange Server.
Warning This workaround may make a computer or a network more vulnerable to attack by malicious users or by malicious software such as viruses. We do not recommend this workaround but are providing this information so that you can implement this workaround at your own discretion. Use this workaround at your own risk.
To work around this behavior, make ports 110 and 25 available. By default, ports 110 and 25 are available 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, 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:
| 1. | Open a command prompt on the Exchange Server computer. You have 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 modify either 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. 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 typical.
MORE INFORMATION
You can also receive this error message when you have antivirus e-mail protection or personal firewall software enabled on your computer.
APPLIES TO
| • | Microsoft Exchange Server 2007 Enterprise Edition |
| • | Microsoft Exchange Server 2007 Standard Edition |
| • | Microsoft Exchange Server 2003 Enterprise Edition |
| • | Microsoft Exchange Server 2003 Standard Edition |
| • | Microsoft Exchange Server 5.5 Standard Edition |
| • | Microsoft Exchange Client 5.5 |
| • | Microsoft Exchange Client 5.0 |
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Microsoft Knowledge Base Article
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