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MS Outlook Error 0x800ccc0f

Written on:June 4, 2013
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Error 0×800ccc0f “Your Server Has Unexpectedly Terminated the Connection” Error Message When You Send anSMTP-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.

SYMPTOMS

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.

CAUSE

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.

RESOLUTION

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

SYMPTOMS

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

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