Microsoft KB Archive/310876

Knowledge Base

OLEXP: "The Message Could Not Be Sent" Error Message When You Send Mail by CompuServe IMAP Server

Article ID: 310876

Article Last Modified on 1/31/2007

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APPLIES TO

• Microsoft Outlook Express 5.5
• Microsoft Outlook Express 5.01 Service Pack 1
• Microsoft Outlook Express 5.0

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This article was previously published under Q310876

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:

257824 OL2000: Differences Between Outlook and Outlook Express

SYMPTOMS

When you try to send a message by means of CompuServe's Internet Message Access Protocol (IMAP) server, you may receive the following error messages:

The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was 'user name@cs.com'.
Subject subject text
Account: 'imap.cs.com'
Server: 'smtp.cs.com'
Protocol: SMTP
Server Response: '556 CLIENT AUTHENTICATION REQUIRED. USE ESMTP EHLO AND AUTH.'
Port: 25
Secure(SSL): No
Server Error: 556
Error Number: 0x800CCC78

-and-

Some of the messages in your Outbox Folder could not be copied to your Sent Items Folder. Your message could not be uploaded to the IMAP server. The server refused to accept it.
Subject subject text
Account: 'imap.cs.com'
Server: 'imap.cs.com'
Protocol: IMAP
Server Response: 'Command 'APPEND' not supported'
Port: 143
Secure(SSL): No
Error Number: 0x800CCCD2

If you receive the second error message, Outlook Express does copy the e-mail message to the Sent Items folder.

RESOLUTION

To resolve this behavior, verify that Outlook Express is properly configured to work with CompuServe's IMAP server. For additional information about how to configure Outlook Express to work with CompuServe's IMAP server, click the article number below to view the article in the Microsoft Knowledge Base:

255186 How to Configure Outlook Express for CompuServe 2000 IMAP

After you verify that Outlook Express is properly configured to work with CompuServe's IMAP server, complete the following steps:

1. Start Outlook Express.
2. On the Tools menu, click Accounts, and then click IMAP Account.
3. Click Properties, and then click the IMAP tab.
4. Click to clear the Store special folders on IMAP server check box.
5. Click OK.
6. Restart Outlook Express.

MORE INFORMATION

The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

Keywords: kb3rdparty kberrmsg kbprb KB310876

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