Connection to the server fails Error# Ox800CCCOE

When trying to open Outlook Express I get the following message: Outlook Express: Finding host connect to ''. Connection to the server has failed. I have contacted my internet provider and they have stated that the problem is not with them, but with Microsoft.
Hello Fitzgerald

Your post is a duplicate of the OP original question. Are you experiencing the same issues? If so then some of the suggest steps to try from this forum are listed below.

Here are things to try

1. The Outgoing (SMTP) server requires authentication. 
 you are using Outlook Express you should check the box 'My server requires authentication'.

2. If you are behind a firewall, we may be unable to authenticate you. 
If you have a personal firewall, try lowering the security or disabling it to see if it is causing the issue.
(Remember to re-enable it after testing) 

3. Your SMTP (outgoing mail server) could be blocked. 
Here is how to test it: 
A. Go to Start -> Run -> type: cmd 
B. When the Command prompt appears type: telnet 25
(include the spaces exactly as shown above) 

C. Wait a few seconds. You should see the following: '220 ESMTP'. This means that it isnotblocked. 
D. If you do not see this message, your SMTP is being blocked.


Turn off e-mail scanning in your anti-virus program. It is a redundant layer of protection that eats up CPUs, slows down sending and receiving, and causes a multitude of problems such as time-outs, account setting changes and has even been responsible for loss of messages. Your up-to-date A/V program will continue to protect you sufficiently. For more, see: 

Why you don't need your anti-virus to scan your email

Note that for some AV programs, it may be necessary to uninstall the program and reinstall in Custom Mode and uncheck e-mail scanning when the option arises. 

If the suggested steps do not apply to or do not address the issue you are facing then please create your own thread with your specific issue and provide as much information as possible. This will allow the focus of the thread to be directly related to the problems you are facing. Thanks

How to begin your own, new thread

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Question Info

Last updated July 23, 2020 Views 25,420 Applies to: