Troubleshooting Outlook Error 0x800C0133

Error 0x800C0133 is a data storage notification. It occurs when your email client (such as Microsoft Outlook, Outlook Express, or Windows Live Mail) is unable to write newly downloaded messages to your computer’s hard drive.

In most cases, this is not a server-side issue with mybox, but rather a local problem where the database file storing your emails has reached a size limit or become corrupted.

Common Causes

1. File Size Limit: Older versions of Outlook and Outlook Express have strict limits on how large a mailbox file (PST or DBX) can be. Once this limit is reached, the application can no longer “fit” new mail into the file.
2. File Corruption: If Outlook is closed improperly (e.g., during a power outage or system crash), the internal structure of the email database can become damaged.
3. Disk Permissions: Your operating system may be preventing Outlook from writing to the folder where your mail is stored, often due to restrictive security settings or a full hard drive.

How to Resolve

To fix error 0x800C0133, you must address the health of your local mail database:

1. Repair the Outlook Data File Microsoft provides a built-in tool called ScanPST.exe (the Inbox Repair Tool) specifically for this error.

• Locate ScanPST.exe on your computer (typically found in the Outlook installation folder).
• Select your data file (ending in .pst or .ost).
• Run the repair process to fix any internal inconsistencies.

2. Compact or Reduce Mailbox Size If your file is approaching 2GB (for older versions) or 50GB (for modern versions), you should move older messages to an archive.

• In Outlook, go to File > Info > Cleanup Tools > Mailbox Cleanup.
• Select View Mailbox Size to see which folders are taking up the most space.
• Use the Archive feature to move old correspondence to a separate local file.

3. Check Disk Space and Permissions Ensure your computer has at least a few gigabytes of free space. If your drive is nearly full, Outlook will be unable to cache new messages from imap.mybox.com.

Distinction Block

Local Storage vs. Server Storage Error 0x800C0133 is a local storage error on your computer. Even if your mybox account has plenty of space available at mail.mybox.com, Outlook will still fail if it cannot save its local copy to your hard drive.

Practical Implications

• Data Safety: Always create a backup of your .pst file before running repair tools or deleting large amounts of data.
• IMAP Benefits: If you use IMAP (the recommended protocol for mybox), your messages are safely stored on our servers. If your local Outlook file is beyond repair, you can simply create a new profile in Outlook, and it will re-download your messages from the server.
• Software Updates: If you are using an extremely old version of Outlook Express, consider upgrading to a modern client, as older formats are significantly more prone to this type of corruption.

Summary

Error 0x800C0133 indicates that your local email “container” is full or broken. By repairing your data file and managing your local storage, you ensure that Outlook can continue to sync smoothly with the mybox infrastructure.