If “Error 0x800ccc0f – Connection To the Server Was Interrupted” appears when attempting to send or receive an e-mail message, the enabled anti-virus protection utility most likely caused the error.
The anti-virus protection utility checks mail when it comes in from the Post Office Protocol (POP) server.
Disable the anti-virus protection utility and the Microsoft Windows Firewall.
Follow these steps to disable the Microsoft Windows Firewall:
1- Go to the Start Menu then click Control Panel to open the Control Panel.
2- Open the Network Connection on the Control Panel.
3- Right click the Internet connection being used (wireless or LAN).
4- Select Properties from the Menu.
5- Click the Security tab then switch off the Microsoft Windows Firewall.
After disabling the Firewall, manually add the incoming POP server name (mail.example.com) and the outgoing SMTP server name (mail.example.com) to the E-mail Accounts Dialog Box in Outlook.
Follow these steps to manually add the POP server setting:
1- Open Outlook.
2- Click E-mail Accounts on the Tools Menu.
3- Click View or Change Existing E-mail Accounts then click Next.
4- Click Add in the E-mail Accounts Dialog Box.
5- Click POP3 then click Next.
6- Type the correct information (listed above) into the POP3 mail server then Click Next.
7- Click Finish.
If the problem persists, then, try to increase the server timeouts:
1. Open Outlook.
2. Navigate Account Settings. (Its' lactation depends on to the OutLook Version)
3. Double Click on the e-mail account that you would like to change.
4. Click More Settings.
5. On the Advanced tab, under Server Timeouts, move the slider bar all the way to Long.
6. Click OK.
7. Click Next, and then click Finish.
8. Restart Outlook.
If the problem Still exists, that means you have a problem with your Internet Connection, so please check it with your ISP.