How to Fix Error 0x800CCCOF

 

Do you use Outlook? Have you ever encounter an error when sending emails? Error 0x800CCCOF is a common error you may meet.

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. The current version is Microsoft Office Outlook 2010 for Windows and Microsoft Office Outlook 2011 for Mac.

It can be used as a stand-alone application, or can work with Microsoft Exchange Server and Microsoft SharePoint Server for multiple users in an organization, such as shared mailboxes and calendars, Exchange public folders, SharePoint lists and meeting schedules. There is third-party add-on applications that integrate Outlook with devices such as BlackBerry mobile phones and with other software like Office & Skype internet communication.

 

Method A:

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Method B:

1. When you encounter an error 0x800CCCOF, the first thing you should do is to check if you are well connected to the internet.
2. If there is no problem with the connection, you can disable your firewall or anti-virus program and try to send an email again.
3. Restart your Outlook email client. Close the program. Wait for a few seconds and reload it from the Start menu or desktop shortcut. Sometimes, a simple restart can troubleshoot error messages with sending or receiving messages in Outlook.
4. If this cannot fix it, you can try to reset your mail account.

Open your e-mail program, click on “Tools”, and then “Accounts”, “your email account”, and “Properties”, “Servers”.

Under Outgoing Mail Server, put a checkmark on “This server requires Authentication “.

Click “Apply” and then “Advanced”.

Change 25 into 465. (under Outgoing Mail)

Put a checkmark on “This server requires a secure connection (SSL)”

Change 110 into 995. (under Incoming Mail)

Put a checkmark on “This server requires a secure connection (SSL)”

Click “OK”.