Error 0×800ccc0f “Your Server Has Unexpectedly Terminated the Connection” Error Message When You Send an SMTP-Based E-mail Message
This problem can arise seemingly ‘out of the blue’. One day everything is fine, the next Microsoft Outlook complains of error 0×800ccc0f when trying to send email.
It comes down to Microsoft products conflicting with Microsoft products, for example, MS Window Firewall blocking MS Outlook. See if one of the scenarios below applies to you and follow the steps to solve the problem.
When you try to send or receive an e-mail message in Outlook 2002, you may receive an error message similar to the following:
Error 0×800ccc0f: Connection to the server was interrupted.
This problem may occur if you have an antivirus e-mail protection utility enabled, which checks the mail as it comes in from your Post Office Protocol (POP) server.
To resolve this problem, disable the antivirus e-mail protection utility as well as the Windows Firewall, to disable the Windows Firewall, follow these steps:
1. Open the Control Panel (Start > Control Panel)
2. Open Network Connection
3. Right click on the internet connection you’re using (LAN, or Wireless, or GreenNet Dial-up)
4. From the menu select ‘Properties’
5. Go to the ‘Security’ tab, and switch off the Firewall.
Then, if you haven’t already done so you need to manually add the incoming POP server name (pop.gn.apc.org) and the outgoing SMTP server name (smtp.gn.apc.org) in the E-mail Accounts dialog box in Outlook. To manually add the POP server setting, follow these steps:
1. Start Outlook.
2. On the Tools menu, click E-mail Accounts.
3. Click View or change existing e-mail accounts, and then click Next.
4. In the E-mail Accounts dialog box, click Add.
5. Click POP3, and then click Next.
6. Type the correct information for your POP3 mail server, and then click Next.
7. Click Finish.
Source: Microsoft Knowledge Base Article – 816866
When you try to send an e-mail message through an SMTP connection, you may receive an error message similar to the following after submission of the e-mail message has completed:
Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Subject ‘Over Limit’, Account: ‘Acount_Name’, Server: ‘Server_Name’, Protocol: SMTP, Port: 25, Secure (SSL): No, Error Number: 0×800CCC0F
2nd possible CAUSE if using Windows 2000
This issue may occur if the message is larger than the message size limit of the SMTP connection. The receiving server will usually generate a 552 error. Other email clients check the maximum length permitted before sending.
Service Pack Information
To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this fix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:
NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Windows 2000 Service Pack 4.
OL2002: “Error 0×800ccc0f: Connection to the Server Was Interrupted” Error Message When You Try to Send or Receive an E-Mail Message