How to Repair Outlook Timeout Error 0x8004210A

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Can’t send or receive e-mail to Outlook? It displays the error code “0x80042210a”, which means that the waiting time for the process has expired and it is waiting for a response from the receiving (pop-up) server of Outlook 2010. If your answer is “yes”, you can be sure that after you follow the methods mentioned here, everything is ready. Fixed Outlook timeout bug. The Outlook 0x8004210a error appears when a user tries to send or receive e-mail using his Outlook account. This error can be very problematic if it is not fixed with the highest priority.

Error Outlook 0x8004210a is the same for Outlook 2016, 2013, 2010 and 2007. This error occurs when Microsoft Outlook can not connect to your mail server. There are many reasons why Outlook can’t connect to your mail server. Here we have listed the possible reasons that may lead to this prediction.

  • Your mail server is temporarily unavailable or your Internet connection is not connected.
  • Incorrect e-mail account settings.
  • Mail server does not have enough time to distribute e-mails over the network.
  • Incorrect firewall or virus protection configuration.
  • When sending an email with a large attachment, this error may occur because the message cannot be sent within the allotted time.
  • User profile in Outlook is corrupted.
  • Changes made by users are found to be incorrect.

Check your Internet connection

Your first reaction should be to check whether Outlook is connected to the Internet or not. Since Outlook can work in offline mode, users continue to work with it without accessing the Internet. When Outlook works without Internet, e-mail is not sent.

Remove suspicious e-mails from your Outlook mailbox.

Infected emails in your mailbox can affect the performance of the entire Outlook application. You can prevent the application from sending or receiving emails. If you know about such emails, remove them as soon as possible.

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Disable the antivirus program


If your antivirus and Outlook are integrated, the antivirus may affect Outlook performance. To prevent antivirus software from interfering, disable Outlook e-mail scanning.

Increase server timeout

  • Open “Account Settings” on the “File” tab.
  • Select an account and click “Edit”.
  • Click “Advanced Settings”.
  • Click the “Advanced” tab in the pop-up window.
  • You can increase the time limit using the “Server Timeout” screen.

Restore the entire Outlook package

  • Open the control panel.
  • Enter the “Delete programs” option.
  • Select MS Suite and click “Edit”.
  • A pop-up window will appear. Select “Restore” and click “Next”.

Transfer Outlook files to a new computer

Try this method because messages can open on a new computer.

To use this method, you need to make sure that you have Outlook on another computer and connect your storage device to your computer (you can also use the cloud for data transfer). Now copy the PST file to a USB stick and connect it to your new computer. Insert this PST file into a secure and memorable place.

And now the final touch: paste the rule file into the folder “% USER_NAME% \ Local Settings \ App Data \ Microsoft \ Outlook”. Now you can use the PST file on your new computer.

If you fail, do not panic. There are other good options to get rid of the 0x8004210a error.

If you need an immediate solution you can try a professional tool to fix the 0x8004210a bug. Otherwise try other methods. Maybe one of the methods will be successful for you. However, if your email is badly damaged, I recommend you to skip the seven methods and go to method 8. This saves a lot of time.

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