Microsoft KB Archive/175327

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Article ID: 175327

Article Last Modified on 6/24/2004


  • Microsoft Outlook Express 5.0
  • Microsoft Outlook Express 4.0
  • Microsoft Outlook Express 5.5
  • Microsoft Outlook Express 5.0
  • Microsoft Outlook Express 4.0

This article was previously published under Q175327


When you use Outlook Express to send or receive mail, one or more of the following symptoms may occur:

  • When you attempt to send mail messages, you may receive an error message similar to:

    Message could not be opened from Outbox folder.

  • When you are connected to your Internet service provider (ISP) and you attempt to download mail messages, you may be prompted for your password again.

NOTE: Also, when customer sends email, the following error message may appear:

Message Could Not Be Opened From Outbox Folder, Account: <account name>MailAccount',Server:'<outgoing mail server name>', Protocol:SMTP,PORT:25,Secure(SSL):NO, Error Number:0x800420CB

(various SRX cases have the error code mislabelled at 0x800420C8)


This behavior can occur if you have two identical accounts with different names or the Outbox.dbx file is corrupted.


To resolve this behavior, remove the duplicate mail accounts. To do so, follow these steps:

  1. In Outlook Express, on the Tools menu, click Accounts.
  2. Click the Mail tab.
  3. Click a duplicate mail account, and then click Remove. Repeat this step until only one instance of the mail account remains.
  4. Click Close.

If the earlier steps do not resolve the behavior, rename the Outbox.dbx file. Note that any items that remain in the Outbox folder in Outlook Express are permanently deleted after you perform the deletion. To do so, follow these steps:

  1. Quit Outlook Express.
  2. Right-click Start, and then click Find or Search.
  3. Search for the Outbox.dbx file.
  4. Right-click the file, click Delete, and then click Yes.
  5. Start Outlook Express, and then try to send the message again.


More than one of the duplicate accounts may be displayed as the default mail account on the Mail tab in the Internet Accounts dialog box.

Additional query words: 4.00

Keywords: kberrmsg kbenv KB175327