For a Microsoft Outlook 2002 version of this article, see 287577.
For a Microsoft Outlook 98 version of this article, see 253504.
For a Microsoft Outlook 97 version of this article, see 253505.
E-mail messages may disappear from your Inbox after they have been read, or they may begin disappearing before you read them if the preview pane is open.
Two possible causes for this behavior are:
You have a filter that applies to only display unread messages.
You are looking at a Microsoft Exchange Mailbox and have an instance of Outlook running that has delivery set to a Personal Folders (.pst) file.
Use one of the following methods to work around this behavior.
To remove all filters, follow these steps:
On the View menu, point to Current View, and then click Customize Current View.
In the View Summary dialog box, click Filter.
In the Filter dialog box, click Clear All, and then click OK twice.
All e-mail messages, both read and unread, are now visible.
NOTE: The procedures in this article only apply if you have installed Outlook with the Corporate or Workgroup option. With this option, you can use Messaging Application Programming Interface (MAPI) services. To determine your installation type, click About Microsoft Outlook on the Help menu. If you have the Corporate or Workgroup installation, you see "Corporate or Workgroup".
If you are viewing your Inbox on an Exchange Server mailbox by using Outlook in the Corporate or Worgroup (CW) configuration, make sure the delivery point is set to your mailbox and not a Personal Folders File anywhere you are running Outlook.
On the Tools menu, click Services.
Click the Delivery tab, make sure that "Deliver new mail to the following location" is set to your mailbox and then click OK.
For additional information about missing email messages, click the following article number to view the article in the Microsoft Knowledge Base: