Article ID: 299496 - View products that this article applies to.
This article was previously published under Q299496
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:
(http://support.microsoft.com/kb/257824/EN-US/ )OL2000: Differences Between Outlook and Outlook Express
Editor's note: This article also applies to Microsoft Outlook Express 5.0.
When you attempt to receive an e-mail message in Outlook Express, the following error message may appear:
An unknown error has occurred. Account: account name, Server: server name, Protocol: POP3, Port:110, Secure(SSL): No, Error Number: 0x80004005
This behavior can occur because of a corrupted .mbx file, typically the Inbox.
To resolve this behavior, rename the affected .mbx file, and then restart Outlook Express: