Microsoft KB Archive/223904

= OL2000: (IMO) Error Occurs When Switching Sending Account =

Article ID: 223904

Article Last Modified on 9/29/2003

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APPLIES TO


 * Microsoft Outlook 2000 Standard Edition

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This article was previously published under Q223904



NOTE: These procedures only apply if you have installed Outlook with the Internet Mail Only option. To determine your installation type, click About Microsoft Outlook on the Help menu. If you have the Internet Mail Only option installed, you see "Internet Mail Only".

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 use Microsoft Word as your e-mail editor and address a message, you may receive the following error when sending:

The messaging interface has returned an unknown error.



CAUSE
After composing the message but before sending it, you switched the account configuration to send the message using a different account. This error may occur more frequently with messages that have files attached.



RESOLUTION
Use Outlook as your e-mail editor to send the message.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
If you intend to send a message using an account other than the default account, switch to the account before composing the message.

Additional query words: OL2K

Keywords: kbbug kbnofix KB223904

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