When you try to receive your email from Outlook Express, an error message “An unknown error has occurred. Account: ‘Example’, Server: ‘example.mail.domain.com’, Protocol: POP3, Port: 110, Secure (SSL): No, Error Number: 0x800C0133 ” display on screen. What’s wrong with the outlook express? The main reason is that the inbox or the .dbx file is damaged or corrupted because of too many emails in inbox or specify folder. According to Microsoft, the maximum file size of the .dbx files that are used by Outlook Express is 2 gigabytes (GB).


1. Delete some of your emails.
2. Create a new folder or new inbox to move some of your emails to the new folder you have created.

Follow these steps to get it done –

> Create the new folder inside Outlook Express called oldinbox, just move all the inbox email to this new folder called oldInbox.
> Find the location of Outlook Express store folder (Tools-> Options -> Maintenance” tab > Click “Store Folder”).
> You may copy the location and paste it in the “Start” > “Run”.
> Click OK to access to store folder.
> After that, just delete the “inbox.dbx” and Restart the Outlook Express, This creates a new inbox.dbx file automatically.

If you follow the steps the mail client error will be fixed and your Outlook Express should be back to normal.

We hope you have found this tutorial useful on how to fix the email error 0x800C0133

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