Article ID: 302339
For information about the differences between Microsoft Outlook and Microsoft Outlook Express e-mail clients, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/257824/EN-US/ )OL2000: Differences Between Outlook and Outlook Express
If you are connected to the Internet through MSN, the Microsoft Network, and you attempt to send messages by using an account other than your MSN e-mail account, you may receive an error message that is similar to the following error message:
The connection to the server has failed. Account: '<account name>', Server: '<SMTP server name>', Protocol: SMTP, Port: 25, Secure (SSL): No, Socket Error: 10051, Error Number: 0x800CCC0E
This behavior can occur because MSN does not allow messages to be sent to another Simple Mail Transfer Protocol (SMTP) server while you are connected to their network.
To resolve this behavior, change the SMTP server for your e-mail account to use the MSN SMTP server. To do this:
Article ID: 302339 - Last Review: June 19, 2014 - Revision: 2.0
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.