How to Fix Outlook Express Error 421

Microsoft Exchange server doesn’t accept connections through POP3 by default. Consequently, when the user tries to send or receive an email, he/she would fail in the attempt, as the server would reject the connection. The error message may vary but will typically begin with "An unknown error has occurred" and specify "Server Error: 421."The error occurs when the number set for maximum inbound server connections exceeds its limit. You can resolve this error by setting the number of connections on the server to a higher value. Follow the given steps to solve your outlook express error.

Step1: Open the Microsoft Exchange Server Administrator utility. The access path to the utility will vary depending on the installation procedure used to set up your Exchange Server.

Step2: In Microsoft Exchange Server Administrator window, click the "Connections" icon .Select the server, which you want to make admin. Double-click the Internet Mail Service icon in the right-side pane. This opens the Properties window.

Step3: Click the "Connections" tab in the Properties window, and then click the "Advanced" button. This opens the Configuration window.

Step4:  Set the number for "Max No. of Inbound Connections" to a high number such as 100. You may need to reset it to higher values until the problem is resolved.

Step5:  Close all open Exchange Server Administrator program windows to save the changes.

Microsoft outlook express doesn't have a built-in filter.Filter help to stop the spam messages from your inbox.If you want to setup filter in outlook express ,you can follow this article-How to Setup Microsoft Outlook Express Filter.

Note:If you want to get technical support on Microsoft outlook express, you can reach online technical support service desk of V tech-squad at their Toll Free No +1-877-452-9201. 


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