How to Remove an Error Message on Outlook Express
In Microsoft Outlook Express, an error will sometimes occur if the computer user tries to send an email to an account on the server using a POP3 connection. The error is known as the "Server Error: 421" error. This error occurs because the number of connections on the server is not set to a high enough number. Unless this number is changed, the error will continually occur.
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Instructions
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Run the Microsoft Exchange Server Administrator utility. Depending on the process used to set up the Exchange Server, the utility access path will vary.
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Go to the left navigation pane of Exchange Server and click on "Connections" for the server that you plan to administer.
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3
Find the "Internet Mail Service" icon located in the right pane of Exchange Server and click on it. The "Properties" box will open up.
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Click the "Connections" tab in the "Properties" box then click the "Advanced" button. This action will prompt the "Configuration" dialog to open.
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Set the number higher for the "Max No. of Inbound Connections" option, for example, to a number such as 100. If the error is not corrected, keep setting the number higher until it is corrected.
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Close out the Exchange Server Administrator to save recent changes.
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